2010 VW Golf GTI.
APR gear.
100,000 km

This car has run perfectly until now.
Forum's are full with this issue, however offer ever conceivable fix you can think of.
Difficult to determine fault & fix.

PROBLEM:
Stuttering during acceleration.
Normal when idle.
Worse when cold.
When warm, still stutters.
Drivable. Just really, really annoying.
Can't feel any loss of power.

When accelerating using the Cruise Control, the engine light flickers on when stuttering.
Does not do this when accelerating using the pedal - when stuttering.
This seems unique?

Also, the fuel consumption readings seems jumpy - with 3 Litre fluctuations driving consistent speed/conditions. I don't recall it doing this before.

1st opinion:
VW dealer mechanic could not replicate the issue, so unable to fix. Could see the Engine Light coming on though.

2nd opinion:
VW Specialist mechanic has some idea's:
- Fit APR Flap Delete and retune.
- Remove carbon build up on Intake Manifold and Intake Valves. $$$$
- Needs a new Turbo Boost Valve as not working (NOT the problem though).

Just wondering if anyone has exactly my problem and what was the fix.

Signed frustrated and tired.