easiest way to change idle fuel??

[gene]

well, i finally have the software loaded and license purchased and the tuning is next. first of the idle fuel is rich and i was curious if there was a simple way to lean it out? another thing..is there anyway i can see with the software if the injectors are stock> i can't psyically read anything on them but, the car used to be supercharger so, i'll assume the inj's were changed? thanks so much for any help!

[bobdec]

Without year, model, MAF or SD mode info I can only talk general.. To lean out idle the easiest is to tune the maf tables or the VE tables at the idle AF (MAF) or RPM (SD) range(s). To verify injectors there should be lb/hr flow rate settings in the constant table.

[gene]

ok thanks, that helps a lot! 1994 vette, hot cam. would you recommend to tune in maf or sd?

[bobdec]

IMO I would tune both, first I would get all my BLM's running at 128 +/- 5% in MAF mode by tweaking the MAF calibration tables. Then turn on SD mode and start doing the same by tweaking the VE tables. It's a drawn out process and VE master helps with the SD tune. Some people say SD is more smoother and responsive, less cam surge with bigger CAMs. Plus if your MAF fails the PCM will fallback to SD mode, so it's nice to know the VE tables are tuned. I personally am running in MAF mode, works OK for me. Some newer OBD2's run a combination MAF and SD for different engine conditions , so it's good to understand both.