Hi everyone,
I'm very much a noob at understanding tuning but I've been doing a good bit of reading in the forum & thought I'd post a question.
The car: 2005 CTS-V, M6, 346ci LS6 w/ TFS 220 heads, Comp Cam 229/239 .627"/.621" 111.5+3, 63lb injectors, Fast 92, LS2 90mm TB, LS7 clutch and 19lb lightened flywheel. After a tune, aside from producing somewhat disappointing dyno numbers (390hp/383tq), the issue is that the car idles and runs fine but, when coming off the throttle, the engine dips down to around 260-300RPM and sometime dies (?particularly if I'm turning the wheel sharply?). If it doesn't die, it'll dip and rev, dip and rev like 5 times and eventually find idle around 950RPM.
I've seen a few similar posts about this that all say the ETC Area Scalar needing to be 0.0192 instead of the stock setting of 0.0255. I believe IAC reset is irrelevant since my LS2 TB is electronic. I believe the culprit is the light flywheel, requiring the Throttle Follower Decay be adjusted ?DOWN?. Is that correct? Does anyone see anything in the attached hpt file that I should ask my tuner about?
2005CTS-V_LS2TB.hpt