changed timing now messed up fuel trims.
05-20-2011, 05:53 PM
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changed timing now messed up fuel trims.
okay so I updated my spark advanced made a gorgeous curve with 25* up top. before I wrote the tune I cleaned my maf sensor and dusted off my airfilter. After I wrote the tune it seems like the fuel trims are absolutely random, driving at a steady 2300rpm it suddenly goes lean then fixes itself. I was looking at the log and there is no rhyme or reason to the lean spikes or rich ones. I'm thinking it may be the maf sensor, but not sure because this same exact thing happened to me last time I changed the spark advanced and I swapped out my good maf sensor and nothing happened. Forget what I had to do last time, fuel trim relearn? idk.. help?
05-21-2011, 01:51 PM
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okay things are looking alot better. Idk what I did but it seems like it just had to learn the new trims. All I did was drive around a bit and it has gotten alot better.
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