doe this answer your question

 

i thought it was just the tune too, but we added fuel and took fuel out and the trims didnt change either way.

 

yes it does. I re read it twice and didn't pick that up.

 

well if you are overly rich then adding fuel wont help. now if you removed fuel from a table that is too rich after you added fuel to it then your not improving.

now are your 02s reading correctly? if they are resposive like normal and reading exceesive values of fuel trims then i would still play with VE till numbers came in order. but make sure you save each file as you do this so you dont get to far out of order incase this doesnt help any

 

we took fuel out from where it is now and that didnt change at all. i just put 2 new o2s in it and it helped the driving but when it idles to long its starts up again. and today i floored it on the highway and the engine light came on and the truck went into limp mode and popped and wouldnt drive normal

 

Whats the code?

 

not sure i barely made it home but i'm thinking it tripped a lean code maybe from the fuel pump going lean up top

 

you need to keep this truck on a scanner till you figure this issue out or else you might hurt it. a scanner will tell you if 02s are working, fuel is rich or lean, and tell you if pump might be failing

 

What do you scan to see if the pump is failing?

 

duty cycle illregulartivity. do muliple scans, and if the duty cycle changes noticably between each scan especially in higher rpms where load would be greater. then a sign of weak pump