fuel trims

[awd93talon]

my low fuel trim is at 80% does that mean its rich or lean?

 

[weith1111]

max rich. the ECU is compensating by running less fuel already.

 

[awd93talon]

so how should i fix it. i have 255 and 510. a safc in there but i took it out tring to fix pk.

 

[weith1111]

Um put the AFC back in. Or stock injectors.

 

[awd93talon]

ill try that. i also get 43 counts of knock at 6k rpms

 

[94Jettameowpsst]

Hmm.....How much boost are you running? Secondly, put the afc back in and at idle, lean it out till your fuel trims steady around 100 or so. Personally, since you obviously have a logger and all the right equipment, i would just richen it up and keep doing pulls till your knock count goes down/away.

Vfaq.com has a good tuning guide, as does this site in the tech article library.

 

[weith1111]

43 counts of knock at 6k probably isn't phantom. 43 counts of knock at 3000 rpm and 20% throttle is phantom knock. If you are seeing knock at WOT, you want to make that go away ASAP!

If you want some help, I'm pretty close to you. Just PM me, I'd be glad to lend a hand.

 

[awd93talon]

ok cool, with the boost thing its at 15 creeping up to 19 psi

 

[beatshack]

an adjustable FPR would help you out a lot...