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why do my ltft's go rich when hot?



chev1988rolet said:
how much percent does the LTFT say?
Click to expand...

I have been MAF tuning, and for the most part... my LTFT's are -+1 .... I locking in at 0 in the interstate cruising.

However, when I am in traffic and my water temp gets 200*+ ... I start seeing my LTFT's go up to -7 even when im idling.... I just don't know why.
 
Rich should cause cooling.. Really rich conditions leads to more fuel making it down stream which evaporates causing cooling. Lean spikes is where a lot of heat is produced
 


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