Zoom50
06-20-2014, 09:17 PM
So my 91 keeps throwing 41 and 91 codes. These indicate a lean fuel mixture (or at least the computer thinks so). I checked for vacuum leaks and all seems ok (vacuum lines are pretty much all new). My fuel pressure is at 40 and I just recently replaced my o2 sensors. I also cleaned my MAF and had a thought...
The guy before me installed 24lb injectors, e303 cam, etc in the 306 crate... It still has the stock MAF on the bbk intake. Do I need to upgrade this? I am just wondering if the MAF is pegged out and more air is getting in than the computer realizes.
Also, the smog pump was eliminated and I have off road H-pipe. Is there something to look for related to the removal of this that might throw a lean code?
I'll get this car right someday.
The guy before me installed 24lb injectors, e303 cam, etc in the 306 crate... It still has the stock MAF on the bbk intake. Do I need to upgrade this? I am just wondering if the MAF is pegged out and more air is getting in than the computer realizes.
Also, the smog pump was eliminated and I have off road H-pipe. Is there something to look for related to the removal of this that might throw a lean code?
I'll get this car right someday.