I have what I regard to be excessive timing pull on my CCTA engine, in an `09 GTI. With a stock ECU mapping I can get -8.3º correction factors on cylinders 1 & 4, and with an APR Stage 1 remap, I can get CF's of -12º on those same cylinders.
VWoC is playing ignorant, and won't tell me what's considered, "normal", referring me to my dealer... who tells me they don't know, but that they don't think it's a problem.
Meanwhile, the vast majority of advice I've gotten from the internet says that 12º of timing is the most the ECU can pull, and that this is a very undesirable run condition, so I'm concerned.
I've searched my eBahn and paper manuals, but can find no factory data on what's considered normal for timing pull. Does anyone have any light they can shed on the topic? Are there any official specs I can use to convince my dealer to take this more seriously?
From my experience the FSI engine will always be at a 0.0 timing pull unless knock is detected. The TSI engines for some reason seem to always be around -3 degrees even in stock form. Sometimes they will run at 0 but not often. I am not sure what the reason for this is. What you are seeing does seem excessive. APR should be able to answer your question. I have seen agressive REVO tunes bump the tsi up to near -8 degrees but that was due to running over aggressive settings.