Thread: why do my ltft's go rich when hot?

Basically I have noticed that my trims go rich when I get really hot.... ie 200* + ... why?

Originally Posted by chev1988rolet

how much percent does the LTFT say?

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

my car goes way lean in traffic, +10

wot i get +1.5, cruising 0, +1, -1