Ok, I know my truck is in need of a tune really bad..but im still curious as to what my A/F should be at idle, and cruising around town. I know ideally when in it under full throttle shouldn’t it be around 12.5-12.7 or so..

This is what im getting currently.
Idle - 12.6-13.0
Cruising (not under boost) 11.5-12.3
I’ve seen it dip all the way down into the 10's at times as well.
Around 3500 rpms and maybe 6 lbs of boost its low 11's hi 10's.

I’m running 30 # injs, and my fuel psi at idle is 30-32, with it getting up to 65-70 under boost.

I have not stayed in it long enough to see 10 psi.


So any ideas?

 

At idle and cruise you should be at 14.7:1

Under boost you should bet 11.8:1 or even in the 12's if you don't have enough timing to worry about detonation.

 

Ive got the crane timing retard with a 2 bar MAP sensor, so I can pull out as much or little as I want.

 

Thanks for the info by the way.