I've been testing some new fueling maps I found on here, and after the car drives a few days on the tune, it will sputter for the first 4-5 seconds after a cold start, then levels out and drives just fine. It does not do this on warm starts. The one time my wideband was able to give a reading during startup, it was reading really lean (15-17)

Do you guys think bumping up my cranking fuel multiplier in that temp range would help a bit, or should I look elsewhere?

 

im doin th same thing.. i got tuned like 2 weeks ago and i had a bad maf sensor changed it and its still doin it.. i would like to know too.. im gonna keep an eye on this!!lol

 

So after reading through a bunch of forums, I'm wondering if it's just coincidental that I made some tune changes, and it's really just my TB / IAC valve being gunked up. I haven't cleaned them in forever. I guess I know what I'll be doing on Tuesday afternoon.

I'll probably take my MAP sensor and spray the **** out of it with sensor cleaner as well just to be on the safe side.