Please help me understand what may be going on with my k04 LOG

[Doomhand]

I need to try to figure out why is the ECU pulling timing but there's no knock. Where can I look at or what can I try to resolve it?

Mods are:

k04-064
New LPFP
HPFP with IE internal kit
RS4 injectors
Cold air intake with filter
3" Downpipe
Forged JE pistons with IE forged rods
r8 coils
Forge front mount intercooler
BKR7E gapped to .024
Already tuned by a company

[mjmallia]

I would use VCDS to check the chain stretch on the cams when warm to see what condition that is in.

Group 91 and 93 hot idle.

[Doomhand]

Thanks for the advice. This car is an FSI engine which uses a belt instead. Or do you mean the little chain that drives the 2 cams together.

[mjmallia]

As mentioned check for chain stretch.

It is a combination of belt and chain the GTI.  The chain stretches over time and puts the timing out once the adjuster runs out of adjustment itself.

Lots of things to check really like wear on the adjuster (should be smooth inside and not groove wear from the ring seals), the rings that sit in it can snap which looses oil pressure in the adjuster that corrects the cams and keeps timing........start to go from around 90k miles onwards

Carbon build up on the intake valves

[Doomhand]

As mentioned check for chain stretch.

It is a combination of belt and chain the GTI.  The chain stretches over time and puts the timing out once the adjuster runs out of adjustment itself.

Lots of things to check really like wear on the adjuster (should be smooth inside and not groove wear from the ring seals), the rings that sit in it can snap which looses oil pressure in the adjuster that corrects the cams and keeps timing........start to go from around 90k miles onwards

Carbon build up on the intake valves

Thanks a lot mjmallia for your insight.

I did the intake valve cleaning myself not long ago (less than 3000 miles).

I checked on VCDS the timing chain spec (operating temp at idle) and it looked good. Heres a picture

[ZoliWorks]

I would also log injection timing, lambda regulator and overall ignition timing. When I checked for timing issues, it turned out to be too much boost, not enough fuel. Crazy high injection timing and lambda correction being maxed out at 25%. I'm running the same boost as you are, on stock k03 injectors lol