A/F way off.
A/F way off. Wasnt sure which section to put this in but I took my car(details in sig) to my tuner the other day and my a/f is at 16.1 and as high as 16.9. what would cause this to get that out of wack. i replaced o2 sensors but have not replaced the maf. Could the maf throw it off that bad or is it just in the mods and the ecu? Im confused. Any thoughts or opinions are most appreciated. Thanks.
I have done the first two items myself. I checked the fuel pressure at idle only tho and it read somewhere around 60 if i remember right. it was where is should have been. the guy i took my car didnt say anything about low fuel pressure at idle. im not sure if he is telling me everything. And I cleaned the heck out of the maf. Sprayed it down several times with maf cleaner. I will look at the third suggestion.
No tune after headers were installed but the car acted like a turd before i did that. i put headers on it and off road y originally thinking the cats were clogged and that was the problem. but it was not.
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Is that the reading at idle or wot? Might want to disconnect the maf next time you have a wideband on it and see what happens. Also if you're talking about wot afr then you need to test your fuel pressure at wot.
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Question #1 - sensor in the tailpipe, or what? You
can get all wrapped around the axle if you believe
the wrong thing.
Bad O2 sensors almost always result in a rich-actual
closed loop operation.
can get all wrapped around the axle if you believe
the wrong thing.
Bad O2 sensors almost always result in a rich-actual
closed loop operation.
I am aware of a glitch in a Tuning Software package that has the Target AFR Stoich formulated backwards. If it was set for 14.1 to 1 (E10) with the software I am refering to the Actual AFR would be 15.1
What Software use to tune it?
What Software use to tune it?