Misfire no CEL no Codes

[jrpug407]

Hi all

I have a Jetta (2012) 1.4tsi CAVD currently clocking 189000km. A bit of info before I get to the issue this car had an engine and transmission replacement at 75000km under warranty according to the dealership it's an updated version of the engine, but now that the warranty is well over the misfires from my obd2 scan is giving me the jitters.

All started with a usual cold vibration, so I used the obd 2 Wi-Fi scan tool to scan the engine, results shown several counts of misfire in cylinder 1. No Check engine light No trouble codes either.

Suspecting it could be bad coils or plugs I switch them around I found that spark plug in cylinder 1 had black soot on it and the tip looked a little bent and so I changed it with a new piece. I ran the scan code again and cylinder 1 still shows 5 counts of misfire still no check engine light nor fault codes.

I do know the the car is not running as it should for at times it's really smooth and sometimes it's rough when it idles too there's intermittent vibrations and when accelerating it's feels like its pulling back.

Next was to bring over to a garage they too were surprised that their scan tool didn't pick up any misfire, so proceeded with a compression test and results were 12 bars (170psi) across all 4 cylinders. At a lost they decided to change connectors to the coil packs as the plastic clip were broken. After all that I ran obd 2 again and still shows cylinder 1 misfire and still no check engine light and no fault codes though my fuel consumption has deteriorated and cold start vibrations are still bad.

I would appreciate any advice given to resolve this mysterious misfires thanks

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[tyr382]

What’s your fuel trims at?


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[jrpug407]

Hi there tyr382 thanks for asking I have managed to copy some of the test results pretty long though.

Mode $01 - Powertrain Diagnostic Data

PIDDescriptionValueUnits
SAE 0x03Fuel system 1 status2
SAE 0x03Fuel system 2 status0
SAE 0x04Calculated load value12.94%
SAE 0x05Engine coolant temperature87C
SAE 0x06Short term fuel % trim - Bank 13.12%
SAE 0x07Long term fuel % trim - Bank 1-2.34%
SAE 0x0BIntake manifold absolute pressure4.35psi
SAE 0x0CEngine RPM868.5RPM
SAE 0x0DVehicle speed0km/h
SAE 0x0EIgnition timing advance for #1 cylinder0deg
SAE 0x0FIntake air temperature48C
SAE 0x11Absolute throttle position12.16%
SAE 0x13Location of oxygen sensors3
SAE 0x15O2 voltage (Bank 1, Sensor 2)0.46V
SAE 0x15Short term fuel trim (Bank 1, Sensor 2)99.22%
SAE 0x1COBD requirements to which vehicle or engine is certified6
SAE 0x1FTime since engine start473sec
SAE 0x21Distance traveled while MIL is activated0km
SAE 0x23Fuel rail pressure709.23psi
SAE 0x2ECommanded evaporative purge32.94%
SAE 0x30Number of warm-ups since DTCs cleared17
SAE 0x31Distance traveled since DTCs cleared198km
SAE 0x33Barometric pressure14.5psi
SAE 0x34O2 sensor lambda wide range (current probe) (Bank 1, Sensor 1)1
SAE 0x34O2 sensor current wide range (Bank 1, Sensor 1)-0.02mA
SAE 0x3CCatalyst temperature (Bank 1 Sensor 1)274.8C
SAE 0x42Control module voltage13.59V
SAE 0x43Absolute load value18.82%
SAE 0x44Fuel/Air commanded equivalence ratio1
SAE 0x45Relative throttle position1.96%
SAE 0x46Ambient air temperature39C
SAE 0x47Absolute throttle position B12.16%
SAE 0x49Accelerator pedal position D14.9%
SAE 0x4AAccelerator pedal position E14.9%
SAE 0x4CCommanded throttle actuator control2.35%
Aux 0x00Input voltage read by the scan tool13.3V

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[VR28LT]

Sounds like excessive carbon build up

[Lucas_R]

Could very likely be carbon buildup on your injectors causing the misfire with those km's.

When VW replaced your engine they would have reused the injectors from your old engine (as well as alternator/starter motor/ac compressor etc) so the injectors have done 189,000km.

Fuel System Cleaner/Conditioner | Supercheap Auto (https://www.supercheapauto.com.au/p/liqui-moly-fuel-system-cleaner-conditioner/325542.html)

Fuel Injection Cleaner - 300mL | Supercheap Auto (https://www.supercheapauto.com.au/p/liqui-moly-fuel-injection-cleaner---300ml/156711.html)

[tyr382]

Hard to say looking at your data at idle.
Your ST is pretty lean but your LT is ok but is in the enrich condition.
Your intake temp is fairly high that could mean carbon build up so I wouldn’t doubt that buildup is the issue.

Another potential issue can be faulty coil pack.
I say do as much as you can to isolate the issue, swap he coil packs from each cylinder and see if the misfire changes position.

Also take it for a drive and watch your LT fuel trims.
Wouldn’t hurt putting in some injector cleaner aswell


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[The_Hawk]

I looked into this a long while back and it seems that it's 'normal' that there is a pretty low number, pretty evenly spread across all the cylinders when you look at the computer.

118TSI Misfire Count (https://www.vwwatercooled.com.au/forums/f112/118tsi-misfire-count-93676.html)

When the engine went bang in 2017 the faulty cylinder did start misfiring constantly and the total numbers went up massively for that one, all the rest were normal. That caused a CEL, but the 'normal' nunmber apparently is OK.

Even after a rebuild it still happily misfires and is up to a few hundred on each. I've considered the R8 coil packs and adaptor for a stronger spark, but I'm not sure even that would fix it, apparently the injector blows fuel in such a way that it's possible to damp the spark too much, apparently it was moved (??) in the CTHD... and even that engine disappeared if that's telling enough for you.

[jrpug407]

Guys,

Thanks a bunch for all the feedback very useful indeed. Sorry I took sometime to post a reply as I was stuck in the garage half a day.

As many of you had pointed out carbon build up could be the culprit here. The guys at the garage did a decarbonization job. It seems to be running a bit better now though obd 2 scan still shows a few misfire counts.

here are the results of obd 2 after decarbonizing apologies for all the clutter

Test report:
------------------
MID:$01 TID:$83
- O2 Bank 1 Sensor 1
Max: 1.92888 Min: 1.99644
Test result value: 0.85125
FAIL
----
MID:$02 TID:$81
- O2 Bank 1 Sensor 2
Max: 0.65002V Min: 0.65978V
Test result value: 0.64026V
FAIL
----
MID:$21 TID:$84
- Catalyst Monitor Bank 1
Test incomplete or dependant test failed
--
MID:$35 TID:$81
-
Max: -20° Min: -19.61°
Test result value: -19.61°
FAIL
----
MID:$3d TID:$8b
- EVAP Monitor (0.020")
Test incomplete or dependant test failed
--
MID:$41 TID:$85
- O2 Heater Monitor Bank 1 - Sensor 1
Max: 1,302.80005°C Min: 759.90002°C
Test result value: 819.90002°C
PASS
----
MID:$42 TID:$81
- O2 Heater Monitor Bank 1 - Sensor 2
Max: 918Ohm Min: 0Ohm
Test result value: 124Ohm
PASS
----
MID:$a2 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 1 Data
Max: 65,535Count Min: 0Count
Test result value: 29Count
PASS
----
MID:$a2 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 1 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----
MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----
MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 3Count
PASS
----
MID:$a5 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----
MID:$a5 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----


End of report.


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[jrpug407]

I looked into this a long while back and it seems that it's 'normal' that there is a pretty low number, pretty evenly spread across all the cylinders when you look at the computer.

118TSI Misfire Count (https://www.vwwatercooled.com.au/forums/f112/118tsi-misfire-count-93676.html)

When the engine went bang in 2017 the faulty cylinder did start misfiring constantly and the total numbers went up massively for that one, all the rest were normal. That caused a CEL, but the 'normal' nunmber apparently is OK.

Even after a rebuild it still happily misfires and is up to a few hundred on each. I've considered the R8 coil packs and adaptor for a stronger spark, but I'm not sure even that would fix it, apparently the injector blows fuel in such a way that it's possible to damp the spark too much, apparently it was moved (??) in the CTHD... and even that engine disappeared if that's telling enough for you.Hawk

Thanks for sharing your thread on the misfires looks like it's common issue with the direct injection tsi engines.

I wondering if the CTHD and CAVD share the same injector placement thus like you had mentioned causing spark plugs to get damped?

If so it I'm wondering did it take so long to show up on OBD ? or perhaps the misfires always been there from the beginning?

Do you suppose in my case could it be a sign of a failing cylinder? My compression test does fall in the normal range though. Appreciate your thoughts many thanks

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[The_Hawk]

My misfires were all very even, when the piston cracked it suddenly ran like a bag of **** and the misfires on that one cylinder instantly skyrocketed. I think they have likley been there all along and are probably not reflective of an impending failure.

Even now following a rebuild and those numbers reset to zero they are slowly growing across all the cylinders.

Your stats seem to be reading a different value to mine (although note that I'm seeing them on the MFD using a PolarFIS), but I get instant misfires on one screen (which is misfires in the last 30 seconds or something like that, so it will show 1 then go back to zero) or total misfires (total number for all time) on another.

You're seeing averages, so they may move up and down, although there are plenty of zero's there... I doubt any of my would be.

What are you reading those with? It would be interesting to drag out my VCDS cable and see what mine are as a comparisson.

[Lucas_R]

Thought this was your car when i first saw it: STAGE 2

VW JETTA 1.4 2013 83k

We... - Engine Carbon Clean NSW | Facebook (https://www.facebook.com/463759637344162/posts/1037750953278358/?d=n)

[jrpug407]

My misfires were all very even, when the piston cracked it suddenly ran like a bag of **** and the misfires on that one cylinder instantly skyrocketed. I think they have likley been there all along and are probably not reflective of an impending failure.

Even now following a rebuild and those numbers reset to zero they are slowly growing across all the cylinders.

Your stats seem to be reading a different value to mine (although note that I'm seeing them on the MFD using a PolarFIS), but I get instant misfires on one screen (which is misfires in the last 30 seconds or something like that, so it will show 1 then go back to zero) or total misfires (total number for all time) on another.

You're seeing averages, so they may move up and down, although there are plenty of zero's there... I doubt any of my would be.

What are you reading those with? It would be interesting to drag out my VCDS cable and see what mine are as a comparisson.I'm using 2 apps Torque Pro OBD Fusion via Wi-Fi

btw I'm on a outstation trip (600km to and from) currently so running the car after decarbonizing was done the day before. I could have detected another issue here while accelerating on high speeds I found the car lurching and pulling back.

Not sure if these problems are related. Digging up online same says it could be a sign of a faulty sensor the N205 variable valve timing oil control valve solenoid.

others say it could be a driveter going bad. Just to which I will post here later is the obd 2 results from my road trip and it's not looking good there are misfires on all cylinders just no check engine light and error codes. Sigh this is getting frustrating .

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[jrpug407]

Can someone enlighten me test shows O2 sensors fail and surprisingly Cylinder 1 test failed too

Test report:
------------------
MID:$01 TID:$83
- O2 Bank 1 Sensor 1
Max: 1.92888 Min: 1.99046
Test result value: 0.81462
FAIL
----
MID:$02 TID:$81
- O2 Bank 1 Sensor 2
Max: 0.64514V Min: 0.6549V
Test result value: 0.63538V
FAIL
----
MID:$21 TID:$84
- Catalyst Monitor Bank 1
Max: 65,535 Min: 4,096
Test result value: 7,830
PASS
----
MID:$35 TID:$81
-
Max: 11° Min: 21°
Test result value: 21°
FAIL
----
MID:$3d TID:$8b
- EVAP Monitor (0.020")
Test incomplete or dependant test failed
--
MID:$41 TID:$85
- O2 Heater Monitor Bank 1 - Sensor 1
Max: 1,302.80005°C Min: 759.90002°C
Test result value: 819.79999°C
PASS
----
MID:$42 TID:$81
- O2 Heater Monitor Bank 1 - Sensor 2
Max: 1,568Ohm Min: 0Ohm
Test result value: 144Ohm
PASS
----
MID:$a2 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 1 Data
Max: 0Count Min: 34Count
Test result value: 27Count
FAIL
----
MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 3Count
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 11Count
PASS
----
MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 3Count
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 9Count
PASS
----
MID:$a5 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a5 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 5Count
PASS
----


End of report.

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[The_Hawk]

Thought this was your car when i first saw it: Engine Carbon Clean NSW | Facebook (https://www.facebook.com/463759637344162/posts/1037750953278358/?d=n)

I think these cars get a lot of blow by messing up the intake. I keep meaning to look into an oil catch can.



I'm using 2 apps Torque Pro OBD Fusion via Wi-Fi

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I'm going to assume on your Android S7?

As an iPhone user I don't get Torque Pro (which is a damn shame!), although I do have a Nokia X6 with it installed if I ever feel the need. OBD Fusion is available on iOS too, but isn't something I really want to pay for since I have all the other tools already.

Why WiFi OBS adaptor by the way? I've always found that the bluetooth ones had far less lag, although that could just be iOS vs Android since I use bluetooth on Android and WiFi for iOS and I have three or four different adaptors I've tried at different times.


Can someone enlighten me test shows O2 sensors fail and surprisingly Cylinder 1 test failed too

Are you getting these results from Torque Pro or OBD Fusion? It's a different set of results I've not seen before. Do you have a screen shot of what you're running?

[jrpug407]

Attached is a screenshot of 2 identical misfire reports one at first scan and the other after the app refreshed.

it's strange torque shows cylinder 1 not ok at first then when refreshed the next one shows ok but with the same misfire counts.

https://www.vwwatercooled.com.au/forums/images/imported/2020/03/e8bd43698cba2b3c7f8e687e138cff40-1.jpghttps://www.vwwatercooled.com.au/forums/images/imported/2020/03/8b6eaa752172a89283bf6f795541b6dd-1.jpghttps://www.vwwatercooled.com.au/forums/images/imported/2020/03/7d2c84f3d2ca110ab937e5b690364541-1.jpghttps://www.vwwatercooled.com.au/forums/images/imported/2020/03/62f2f4d4ffc3b23343e3f3475f122abe-1.jpghttps://www.vwwatercooled.com.au/forums/images/imported/2020/03/135b53eb33432c5b0797def504964485-1.jpghttps://www.vwwatercooled.com.au/forums/images/imported/2020/03/23622a3cf1a5b42f0ce35aafad25ad2d-1.jpg

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[The_Hawk]

I've done about 7,000km since the rebuild and my count is up to about 300 on each cylinder (total that is).

Rather annoyingly, the fancy bluetooth adaptor I have doesn't work with Torque Pro, but the WiFi one does, although when it comes to real time data it's bloody slow and laggy. Sadly I can't find my very cheap bluetooth one which worked flawlessly with almost zero lag :(

In nay case I've got green ticks across the board, but I really don't believe those misfire averages.... but hey, maybe it's better than I think, but the PolarFIS often shows a 1 here and there if you watch it, especially when cold and accelrating off from a set of lights. Far more than an average of zero anyway.

Remember that Torque Pro is a generic tool. ODB11 or VCDS (if you want to go all out) are the tools of choice.

Really though, I was tearing my hair out trying to understand why I was getting misfires but ultimatly accepted it's normal and stopped looking at it so much... (says the person with a dedicated polarFIS screen...)

Mode $06 report generated by Torque for Android
================================================

Test report:
------------------
MID:$01 TID:$83
- O2 Bank 1 Sensor 1
Max: 1.99882 Min: 0.30003
Test result value: 0.79047
PASS
----
MID:$01 TID:$84
- O2 Bank 1 Sensor 1
Max: 0.06997 Min: -0.06997
Test result value: 0.00296
PASS
----
MID:$02 TID:$81
- O2 Bank 1 Sensor 2
Max: 0.65002V Min: 0V
Test result value: 0.64026V
PASS
----
MID:$02 TID:$82
- O2 Bank 1 Sensor 2
Max: 1.26002V Min: 0.65002V
Test result value: 0.65978V
PASS
----
MID:$02 TID:$83
- O2 Bank 1 Sensor 2
Max: 0.24839V Min: 0V
Test result value: 0V
PASS
----
MID:$21 TID:$84
- Catalyst Monitor Bank 1
Max: 65,535 Min: 4,096
Test result value: 10,784
PASS
----
MID:$35 TID:$80
-
Max: 21° Min: 11°
Test result value: 20.76°
PASS
----
MID:$35 TID:$81
-
Max: 21° Min: 11°
Test result value: 20.76°
PASS
----
MID:$3d TID:$8b
- EVAP Monitor (0.020")
Max: 655.34998 Min: 0.1
Test result value: 1.22
PASS
----
MID:$41 TID:$85
- O2 Heater Monitor Bank 1 - Sensor 1
Max: 1,302.80005°C Min: 759.90002°C
Test result value: 819.90002°C
PASS
----
MID:$42 TID:$81
- O2 Heater Monitor Bank 1 - Sensor 2
Max: 1,132Ohm Min: 0Ohm
Test result value: 158Ohm
PASS
----
MID:$a2 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 1 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a2 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 1 Data
Max: 65,535Count Min: 0Count
Test result value: 0Count
PASS
----
MID:$a3 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a3 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 2 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----
MID:$a4 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a4 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 3 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----
MID:$a5 TID:$0b
EWMA Misfire counts (average) for last 10 drive cycles - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 2Count
PASS
----
MID:$a5 TID:$0c
Misfire counts for last/current driving cycles(calculated) - Misfire Cylinder 4 Data
Max: 65,535Count Min: 0Count
Test result value: 1Count
PASS
----


End of report.

[jrpug407]

Hey, Hawk thanks for sharing your results at least I now know how another vw might fare at the scan test. How's you fuel consumption?

OBD11 for the moment is a bit pricey for me, it would set me back about 400 bucks therefore not an option for now.

btw have you experienced any uneven acceleration like lurching and pulling back while cruising at high speeds?

My car is due to the garage on Monday will update you as to the outcome.

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[The_Hawk]

My fuel consumption is all over the place because it doesn't get driven. When it's only back and forth to the shops it can be as high as 12L/100km, on a trip that is down into the 7's. If I drive a decent distance it's more like 8.x around town.

I wouldn't say I've had any uneven acceleration or lurching and nothing at high speeds, so something doesn't sound right there.

[jrpug407]

Hi there Hawk and the rest,

Hope you guys are all ok it's quite unfortunate that we've been experiencing these crazy endtimes scenario, I believe this is the closest we who are currently alive have come to the end.

Never has anyone living experienced this sigh anyways just to update the grp I was scheduled to send my car in to investigate the misfires etc, when the pandemic went out of control.

The gov has enforced an MCO (movement control order) all businesses to close for 28days pending which if cases drop then they'll lift the ban praying and hoping it will.

I did more searching up found on a ford forum that cold or random misfies could be due to a failing valve spring. In another vw forum some say it could be due to a faulty PCV valve too. I'll try to paste those links here.

Till then guys stay safe take care of yourselves

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[jrpug407]

by the way I guess you guys from down under shld be delighted with the following news from VW

Volkswagen recalls Golf, Jetta, Passat, Polo and Caddy for DSG faults | CarAdvice (https://www.caradvice.com.au/840587/2012-2014-volkswagen-golf-jetta-passat-polo-and-caddy-recalled/)

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[mr gee]

I found my Beetle (CTHD) was affected by the latest VW campaign 35E5 thanks to your last post. Will give VW a call tmr and find out whats that about

[jrpug407]

Hi there Hawk and the rest,

Hope you guys are all ok it's quite unfortunate that we've been experiencing these crazy endtimes scenario, I believe this is the closest we who are currently alive have come to the end.

Never has anyone living experienced this sigh anyways just to update the grp I was scheduled to send my car in to investigate the misfires etc, when the pandemic went out of control.

The gov has enforced an MCO (movement control order) all businesses to close for 28days pending which if cases drop then they'll lift the ban praying and hoping it will.

I did more searching up found on a ford forum that cold or random misfies could be due to a failing valve spring. In another vw forum some say it could be due to a faulty PCV valve too. I'll try to paste those links here.

Till then guys stay safe take care of yourselves

Sent from my SM-G935F using TapatalkOk here's some updates with regards to the misfires.

Throughout MCO/lockdown that's roughly abt 40days for us I couldn't use the car that much occasionally a grocery run. However I have warmed the car once every 2 days or so.

Noticed that the during cold starts the car vibrates then fizzles off to a smooth idling so this has been my issue throughout the lockdown.

After all this time my fuel finally ran out which means it's been in the tank for at least 20 ought days or so I finally refueled the car on Saturday and today when I started the car (cold start) to my surprised it didn't vibrate like it did it was smooth.

Could be the fuel then? I will update this page soonest when I'm able to do a OBD 2 and will share the results here.

Take care all keep safe

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[tigger73]

Certainly could be fuel related if you had some lower octane fuel can certainly cause misfires/pinging.


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[jrpug407]

Hi all

I finally got around to service my Jetta mk6 as for the misfires it could be down to the Chinese made obd 2 that I've been using as the garage still can't detect misfires.

That being said there a new problem that just popped up right after servicing the car, it idles high at P position abt 1000rpm like as though you're still stepping on the throttle I tried a light tap on the throttle and it went back to normal 745rpm.

Could it be a faulty throttle sensor? It feels like the throttle is stuck and upon tapping on kinda releases it.
Not sure what to make of the problem.

Manage to get a video of it will try to attach to this post.http://cloud.tapatalk.com/s/5ef0de0034d74/20200622_230826.mp4https://www.vwwatercooled.com.au/forums/images/imported/2020/06/d59b48433a3bb54ee36216204e8b2342-1.jpg

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[The_Hawk]

I believe it will run richer and noisier on startup until it warms up, although clearly not the case here as it's 28C and the engine appears warm.

Revs will also sit higher if the AC is on (does that change things?).

PS. Fix the bulb.

[jrpug407]

hahahahaha Hi Hawk yea the change blub indicator has flashed for some weeks now, would need to change that this time round.

You've describing the way my car starts up (first start or cold start) yes that's normal, but the problem I'm describing here is an unusual one happens after the running the car and once parked the rpm sorts of notch up a little and maintains at 1000 rpm doesn't go down to normal levels ie 730 ish unless I tap on the pedal a few times. It's due back to garage next week will update you as to the outcome.

Jumping to other topic here I found that the abs esc lights have come on too which the garage indicates the wheel sensors are faulty so gonna get that change too. Here I'm asking if the abs sensor lights up obd2 is supposed to pick up the fault right? ....Mine doesn't sigh

Anyways how have you been doing Hawk hope all is good




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[jrpug407]

My fuel consumption is all over the place because it doesn't get driven. When it's only back and forth to the shops it can be as high as 12L/100km, on a trip that is down into the 7's. If I drive a decent distance it's more like 8.x around town.

I wouldn't say I've had any uneven acceleration or lurching and nothing at high speeds, so something doesn't sound right there.Ok it's be awhile since I posted an update on the misfires my car is plague with. The walnut blasting I had done twice at the previous garage didn't help much.

In short *carbon build up* on the intake manifolds especially on the valves and *vacuum leaks* vent hose leaking breather valve
vacuum Hose & air Hose cracked and leaking after 9yrs had to be replaced these were the main culprits.

I had taken the car to another garage and the mechanic took his time to work on the car abt 12days @1.5k bill

As it stands, cold starts spluttering and excessive vibrations are no longer obvious, the engine starts up like a charm runs really well too.

However, that being said I maybe in the same boat as Hawk those annoying misfires are still present on cyc 1 according to OBDll, but this time at very low counts unlike before also those intermittent vibration felt under the seat is still noticeable.

So it's a paradoxical situation the problem by large is solved but not entirely so.

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[The_Hawk]

It does seem that one or two misfires on a fairly consistent basis is just how it goes for this little engine. There are lots of different ideas on what could be the root cause and I've read about people trying all the fixes with no definitive results.

I'd like to replace the coils with R8 ones for a stronger spark (one of the causes apparently being that the fuel injector blows out the spark). You need an adaptor to get them in there and the wiring needs to be modified (switch around the pins on the ignition coil plugs) before they work, but they end up being about AU$500 including shipping and customs (€187.40 for the parts and €119.53 for shipping for a total of €306.93).

Set of R8 coils With Adapter 1.4 TSI - Ignition Adapters - Adapters - Products (https://www.r-tmg.com/products/adapter/coils-adapter/r8-397.html)

... yet again I have them in my shopping cart... but with the state of the world currently, I might just wait and see how things pan out before ordering things from Greece :P


edit: although a little googling says they are available here from one of our ex-sponsors here in Australia:
Volkswagen Audi Skoda 1.4 TSi R8 Coils Adapter Black RTMG Performance - Euro Car Performance & Electronics Upgrades (https://eurocarupgrades.com.au/vw-audi-skoda-1-4-tsi-r8-coils-adapter-black-rtmg-performance.html)

It works out to be a little bit more expensive at $560, but it's local and supports Australia business.

Damn you tempting things!

[jrpug407]

It does seem that one or two misfires on a fairly consistent basis is just how it goes for this little engine. There are lots of different ideas on what could be the root cause and I've read about people trying all the fixes with no definitive results.

I'd like to replace the coils with R8 ones for a stronger spark (one of the causes apparently being that the fuel injector blows out the spark). You need an adaptor to get them in there and the wiring needs to be modified (switch around the pins on the ignition coil plugs) before they work, but they end up being about AU$500 including shipping and customs (€187.40 for the parts and €119.53 for shipping for a total of €306.93).

Set of R8 coils With Adapter 1.4 TSI - Ignition Adapters - Adapters - Products (https://www.r-tmg.com/products/adapter/coils-adapter/r8-397.html)

... yet again I have them in my shopping cart... but with the state of the world currently, I might just wait and see how things pan out before ordering things from Greece [emoji14]


edit: although a little googling says they are available here from one of our ex-sponsors here in Australia:
Volkswagen Audi Skoda 1.4 TSi R8 Coils Adapter Black RTMG Performance - Euro Car Performance & Electronics Upgrades (https://eurocarupgrades.com.au/vw-audi-skoda-1-4-tsi-r8-coils-adapter-black-rtmg-performance.html)

It works out to be a little bit more expensive at $560, but it's local and supports Australia business.

Damn you tempting things!I was recommended by the pervious garage to change coil packs as a solution to fix the misfies. They gave me 2 options for the R8 ones OEM or originals which were double the price, went ahead with the oem ones sadly that didn't resolve the misfires.



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[The_Hawk]

While new coils might give a better spark than old ones, as long as they are working I can't imagine there is any real improvement replacing them with new ones... the whole point was the R8's was because they (supposedly) provide a stronger spark. Same reason people upgrade them on the GTI's as they turn up the power.

I do recall reading about people who did the upgrade and still saw misfires anyway... so who knows! If I remember correctly, part of the CTHD update was to move the injector further away from the spark plug than in the CAVD engines to help with misfires.

[jrpug407]

Yes, agreed there's noticeable difference after installing them, most likely my attention or rather obsession lol was zoomed into picking up misfires. How's your fuel consumption has it improved ?

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[The_Hawk]

I haven't done the upgrade, but I wouldn't expect any change to consumption or performance really, after all there are (relatively) few misfires anyway which means it's doing what it should even with the stock coils. Theoretically you could get a better burn... but really it's more about minimising issues (and lets not forget it looks cool... :P )

Same story for the new pistons, no change, just worked again after they were installed.

I know I posted in here somewhere about the misfires and the total numbers, calculating the average per 1,000km...
annnnd found it... (https://www.vwwatercooled.com.au/forums/f112/118tsi-misfire-count-93676.html)

That was at 16,000km I had about 1,500 misfires on each cylinder, now I have 500-600 across each since the rebuild at 31k and I'm now on 39k (yeah... on an '11 Cab I clearly don't drive enough). So the average is about the same as before... which I suppose is a good thing in that it's not getting any worse. I'm reasonably confident that I'm probably still running the same coils (since I've never replaced them) spark plugs were done at 26k, so they are about 13k old and only about half way through their life.

[jrpug407]

The ever resourceful Hawk, thanks buddy we owe you big time man, just to update you the small misfires keep popping up now and then well there are still there but I am keeping my fingers crossed it may all go away when I change my timing chain @190k km, I'll know in a week or so maybe all these problems that never had happened before is due to a worn out timing chain.

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[jrpug407]

The ever resourceful Hawk, thanks buddy we owe you big time man, just to update you the small misfires keep popping up now and then well there are still there but I am keeping my fingers crossed it may all go away when I change my timing chain @190k km, I'll know in a week or so maybe all these problems that never had happened before is due to a worn out timing chain.

Sent from my SM-G935F using Tapatalkoh and the annoying intermittent vibrations during idling too just tired of them.

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[greyfawkes]

The ever resourceful Hawk, thanks buddy we owe you big time man, just to update you the small misfires keep popping up now and then well there are still there but I am keeping my fingers crossed it may all go away when I change my timing chain @190k km, I'll know in a week or so maybe all these problems that never had happened before is due to a worn out timing chain.

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Hey there! Just wanted to know if there were any changes to your misfires after getting the timing chain service done?