I'm relatively new to HPT, I have used DHP for the GM V6's for a few years now. Anyway, a friend of mine asked me to tune his 2000 T/A, M6. It has standard bolt ons (LT's, lid blah blah) and the Texas-Speed XS Series Camshaft:
233/239, .595"/.603" and 113LSA.
This is how I've tuned VE's on the V6's and from what I've read on some of the thread's its the same principle.
Unplug MAF (just disable the SES light, not the code completely for the MAF)
Copy high octane to low octane table
set PE to come in at a higher TP % like 80% etc
Disable LTFT learning in PCM
Flash pcm, clear LTFT's in scanner.
Begin logging, copy paste the STFT average trims multiplied by % on the VE table.
Smooth table, repeat until trims are as close to 0% as possible.
I know about the wideband, I just don't have one yet. He's renting a dyno for the WOT tuning
After about 5 street runs, just cruising around idling - I noticed the car was starting to act better however, at idle the STFT's were still PIG rich, around -39% range on both banks. After the VE table at idle, around 45-60kPa range was like a blackhole, talking 15-17 efficiency ratings for those cells and the trims weren't getting better - I had him plug the MAF back in.
This caused the STFT's to then go really lean, +25% range at idle. I continued the VE tune with the MAF plugged in, left LTFT learning disabled, and I got the STFT's in line and the car is MUCH better now with this method. The VE table also doesn't have that blackhole at the idle rpms and looks better now.
Question is - did I do this the right way? It SEEMS to be working less the issue I have described below. I just don't want to go any further if I have screwed up this foundation process.
The only issue's he has now is the high idle when you push the clutch in, then it drops and almost dies - barely saving itself. I searched and read up about zeroing out the throttle cracker and tuning the RAF table to correct this.
Thoughts?