houstonbuckeye

My car exhibits a condition that feels like either an engine stumble or PDK transmission slip. This happens under low to moderate acceleration (not hard enough to kick the trans down a gear) between 2200 and 2700 RPMs particularly when doing this on an incline. My Porsche dealer service advisor told me that if it was related to the PDK or engine, it would throw a code and I would see a warning light.
The car is a 991.2 GTS with a GIAC tune.
Any help will be appreciated.

Rich_Jenkins

Is this a recent problem? If so, might want to swap gas brands, see if the problem goes away after a few tanks. Have you filled up from any sketchy pumps lately?

houstonbuckeye

I have had this issue while using several brands of 93 RON fuel.
I typically use Chevron fuel, but have run Shell and Exxon as well. I don’t use off brand fuels.

Rich_Jenkins

Missed this part. Did it do this without the tune? I know next to nothing about tunes, but do they not change engine parameters / fuel rate(s) etc.?

I can't really help any further, to be honest, hopefully someone can that knows more about engines/tune/stumbles. Good luck.

DBH

Two things come right to mind: 1) quality of gas and 2) issues w/tune. One's an easy fix, the other...

Class5Kayaker

Could be this: https://rennlist.com/forums/991/9061...ble-issue.html