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Showing results for tags 'stumble'.
Trying to track down an issue I'm having on my 2013 TT. It has a stumble when accelerating in the 1800-2500 rpm range in basically any gear. If I punch it, it will sometimes act like a misfire. I've changed plugs and coils and looked for vacuum leaks in the front and rear of the engine but didn't find anything. I hooked up an Edge CTS to it and watched various parameters over the past few days but don't see anything obvious. Spark timing looks good and consistent, fuel pressure looks OK, Long term and short term fuel trims look OK (see below), and O2 sensors don't appear to be mal