Too rich Codes
#1
1996 GMC Jimmy, 4.3 DUH! DTC codes p0172 and p0175 pop up. Truck runs great, starts great and i cant even tell there is an issue but my computer says there is. Regaurdless i need to figure out the issue. MAF and MAP readouts seem good. I would like some ranges of what my sensors "should" be saying so i can narrow down what is causing my issue. I did notice my fuel trim is at about -13.xx on both banks (ST FTRM) at operateing temp. If i'm corect that means it's trying to lean it out like crazy right? This is at idle.
Can someone hook a reader to their truck and tell me what all the sensors read at operating temp.
Can someone hook a reader to their truck and tell me what all the sensors read at operating temp.
Last edited by rriddle3; 07-16-2011 at 05:00 PM. Reason: COMBINING CONSECUTIVE POSTS
#2
Do you have a k&n intake or filter?
#3
I have a Spectre aftermarket filter. Not oil charged. It's dryflow.
#4
So you have already checked the maf for dirt? How about the vac line going to the map?
#5
the MAF sensor seemed clean, i cleaned it with brake parts cleaner anyway. The MAP reading looked normal when i viewed it with my scan tool but i didnt check the vacuum line for it, where is it?
#6
You cleaned the maf with brake cleaner? You may have damaged it. You should only clean a maf with electrical parts cleaner. I need to check out how rhe map is set up. If it is attached to the manifold then it may not have a vac line.
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