Hi, I've been having an issue recently on a tune i've done for an edition 30 DSG golf gti k04, 3" decat, VIS HPFP, larger FMIC, intake pipe,rs4 FPRV etc.

The car keeps closing throttle at 6200rpm roughly from 99.6% to 94ish. i've attached some logs so you can see whats happening (same setup with and without throttle closure).
I thought it was fuel at first i.e. lack of it and i thought trims may be high at the upper rpm's but there within 3-5% (25% after a gear change due to boost spiking to 1.7bar) I'm pushing the setup quite hard and have logged it without the throttle closure but recently every log is the same i.e. closing at 6200rpm. The car is ran on 99RON fuel too.
Any feedback will be appreciated, disclaimer the first log is a bit messy but i wanted to know what was happening to the trims on gear changes due to the boost spikes. The dsg box is also tuned and has had tq limits in increased to 500nm.

Thanks
Jack

Hi, thanks for the reply! i've checked my stft's and ltft's and there 0.5% so surely my maf corrections is ok? i've played with KFKHFM in the past and its always threw out my trims if i say do a blanket correction of 5% for example. My intake is aftermarket but the diameter is stock although the volume will definitely be different so i will look into what you've mentioned.

Also the boost spike your referring to is it after a gear change? if so i've been having issues controlling boost when letting off at high rpm and i've been experiencing boost spikes - i've tried reducing IMX in the area where overboost occurs but haven't had much luck reducing the overboost when coming of throttle at high load. I've just turned off the overboost function (LDOB) so will see if this helps with any overshoot.

Did you solved your problem? I have similar throttle closing to 90% after 5k rpm


Edit:

So i I noticed that I do not reach specyfied load despite the fact that the boost is correct. I decided increase about 5% KFKHFM in high load and rpms. This solved my problem, throttle is not closing anymore.
My maf is oem, but very old. I exclude boost leaks.