Sixxshot87
Member
- Joined
- Sep 3, 2008
What are the common causes you guys have noticed that are the cause(s) of running fine up until about 13-16lbs of boost and then car falling on its face from running lean?. I do not have an in car fuel pressure gauge but the rail gauge says its at 43lbs when in idle and O2s read around 800 till around 13-16lbs then drop off to like 50-200 like I'm running out of injector or some thing. I usually run around 22-25lbs of boost but the car is just not having it. If i stayed floored it would just run so lean that making any more boost would be impossible/dangerous. The injector thing doesnt make sense because i have a TT chip mached to 60lb mototrons and have it dialed up to add 20% fuel. The car does not pop out the intake at all like a bad coil pack at low boost or anything. Again the best way I can describe it is like I am running out of injector. I get sufficient pressure up to the boost levels I said then it leans out and does that in-boost lean out sputter with 1-3.5 degrees of knock and a low MV reading. Im ranting now but any past experiences or shots in the dark would help. Thanks