Looking for a bit of help.
Been chasing a negative fuel trim issue, sometimes near -18 on both banks.
Fuel pressure is good. 58
FPR is functioning and new
Injector pulse test 60-30psi, all the same, and new style bosch not rochester, I changed them myself.
Lower intake manifold gasket is...
need help........
yesterday.........threw codes for MAF and others,........checked LTFT on bank 2 ans 1 and is was @-2%, nearly perfect.........running fine......reset code
today......no code.....noticable knock.....checked LTFT +17 at times, bank 1 ok.
any thoughts?????
Np246...........
intermitent grinding noise.......... IN 2wd
noise will go away instantly when shifted into 4wd or auto from 2wd
no noise in 4wd or 4wd auto
will not shift into 4lo ( the encoder motor is trying to shift but will not and goes back to 4wdhi......loud bangs)
am I correct in...
Some say the 4l80e cant handle much power. I have another 2500 Suburban,6.0 Vortec, stroked to 6.6, then supercharged. Anyone running a stock 4l80e \ np246 in high HP applications?
I know what books say, I am wanting real world knowledge.
recently purchased a 1999 Safari Trek motorhome. For those who dont know, they a ridululously well made motorhomes. The company went outod business diring 2008 recession.
anyway, had slow crank issue when warm, so new fpr and injectiors.
working on this issue inthe rv is great, as i can be...