3KVT
09-19-2013, 11:47 AM
So here's the basic break down of what's happening:
Car starts fine when cold, but hard starts when warm. It will turn over if I give it a little gas, but not without it. I have a constant idle, but my afr bounces around (I have the innovate multi) and when I'm driving and I take the car out of gear, it sometimes will not hold idle and die. I have no issues under WOT, and I'm running about 16.5lbs of boost.
I have 16T's and supporting mods (i.e. bigger injectors, fuel pump(hot-wired), and a GMAF to name a few). Everything is getting proper voltage and fuel system is cleaned regularly, including filter. I've been told by more than one person that these issues are most likely related to the GMAF or the ECU. I'm praying it's not the ECU. The car was tuned at GZP, and while the idle afr was a little erradic, I was not having the issue with starting and maintaining idle after pulling the car out of gear. I have not messed with the settings that were set at GZP, and I can provide those later today if needed.
I'm wondering if I need to go back to a baseline and start re-tuning from there, or if you guys think the ECU could be the problem. I realize it's nearly impossible to diagnose things like this without seeing the car in person and tinkering, but any help would be greatly appreciated. If you guys think I need to start from a baseline, I'd like to know what those settings would be. I have found very limited info for this on the net, and most of the aftermarket settings for the GMAF I've found are for DSM's.
Thanks in advance!
Car starts fine when cold, but hard starts when warm. It will turn over if I give it a little gas, but not without it. I have a constant idle, but my afr bounces around (I have the innovate multi) and when I'm driving and I take the car out of gear, it sometimes will not hold idle and die. I have no issues under WOT, and I'm running about 16.5lbs of boost.
I have 16T's and supporting mods (i.e. bigger injectors, fuel pump(hot-wired), and a GMAF to name a few). Everything is getting proper voltage and fuel system is cleaned regularly, including filter. I've been told by more than one person that these issues are most likely related to the GMAF or the ECU. I'm praying it's not the ECU. The car was tuned at GZP, and while the idle afr was a little erradic, I was not having the issue with starting and maintaining idle after pulling the car out of gear. I have not messed with the settings that were set at GZP, and I can provide those later today if needed.
I'm wondering if I need to go back to a baseline and start re-tuning from there, or if you guys think the ECU could be the problem. I realize it's nearly impossible to diagnose things like this without seeing the car in person and tinkering, but any help would be greatly appreciated. If you guys think I need to start from a baseline, I'd like to know what those settings would be. I have found very limited info for this on the net, and most of the aftermarket settings for the GMAF I've found are for DSM's.
Thanks in advance!