intermittent idle dip at operating temp and find fault.

[Bill Lee]

A 7da 2.0 1997 aac pet man t4, my van is in relative good repair, but for some time a problem with the idle area has eluded me even with vagcom and physical tests and all with positive results leaving just why it behaved this way-until it stopped starting.
The van would start and run well up until warm, then it would drop momentarily almost stalling, regain in the same second until 5 to 10 seconds and do it again...regularly.
Basically the suspects (left) are injector tips, ecu, immo, CSV, ecm, iacv and a 'throttle bypass valve'.
Although I will need some info on what the actual components are for CSV ecm as I think these may be more likely the problem. Or injectors.
Essentially theres no spark from the coil but worked before it stopped. Dissy new. The order is slightly unclear 1432 with tdc and dizzy mark,rotor aligned. 1 being THE NEXT lead along?!? right.
Anyway all other things tested or evaluated show working order. Not much is left. Vagcoms only lead before was that ecu needed joining with immo which I did, its silent now.

Maybe you know the symptom.