cold startup tuning issue
cold startup tuning issue lately been having a problem with my car....not sure what the hell. it will sit there and burn rich, have to tap the gas to keep it going...and if it will idle...it'll sit there and surge real bad...400-1200rpms...back and forth. i have a scan of the run...and after a few minutes the 02's start switching and everything is fine....wanting some gurus to look at these tune's and the scan to see what is up...
first one will be the tune i made and it ran great on.
second is a buddies slight mods he made to it.
third is the run itself, dont mind the wb02. its reading wrong...but on fireup its around 12.5 and it will idle around 15 when everything runs fine.
first one will be the tune i made and it ran great on.
second is a buddies slight mods he made to it.
third is the run itself, dont mind the wb02. its reading wrong...but on fireup its around 12.5 and it will idle around 15 when everything runs fine.
First off, your fuel trims pull 10% immediately after start up. That should be your first indication right there. Second, you're not logging your IAC, so no telling where it is, and if it needs to be open more on start up, or if it's even right when warmed up fully.
Surge is almost always too much fuel. Need to dial in the VE and MAF. Then you need to adjust the OL/EQ table to get the open loop fueling correct.
Surge is almost always too much fuel. Need to dial in the VE and MAF. Then you need to adjust the OL/EQ table to get the open loop fueling correct.
