Hello i dont have a hp tuners and don?t know anyone here in granite falls Wa that has one .
I have a 04 6.0l lq4 stock I have only installed flex fuel injectors 25326903 and a intake tube for the air cleaner
and the pcm has been programmed for them by psi conversions it program is from a 04 yukon Denali xl 6.0 lq4.
in my 38 olds coupe and I?ve been fighting this lean code on both banks for a while
what I?ve done so far is changed intake gaskets and plugs and wires and replaced the 2 vac lines from valve covers to intake and redid the intake tube with 6? of straight pipe before and after the mass air flow I haven?t found no leaks. I had it smoked tested today ant their was no vacuum leaks.
Fuel pressure is58lbs at idle
also o2 sencers are new bosh ones the drives o2 bung is welded in at 5 1/2? from the stock exhaust I cut off the flangers and welded on a pipe to clear my frame.
Passanger side is 8 ? from the stock exhaust where the bung is welded in
the dip stick and tube is new with the new holley oil pan and gasket.
Ive noticed the pass valve cover frount where the vac line goes to intake behind the tb it sucks air if you plug it up it will keep producing more and more vac.
The drivers side has a little blow by coming out of it and I have a hydro boost setup so no vac line their.
I know it?s running lean when I changed the plugs they was white on the tips.
Oh yea I baught a BlueDriver scan tool that has live data and the ltft are 25 % both banks
I got to thanking today I have a returnless system with a corvette filter.
Would that be causing my lean codes at idle?
I went to a mechanic that used to work for gm he had me unplug a o2 sencer and it read 4.5 when it was unplugged like it had Perfect fuel trims is that normal ?
Sorry for such long post and all the pics but I?m having a hard time getting this fixed it?s kicking my butt.
I also have the log from the live data but not sure how to post it. And trying to post pics but can?t figure it out.
I?ve posted on another sight but as usual I get no reply?s on that sight
Thank you kelly