01 4.8 in an 87 suburban w t400
Stock 01 fuel pump in 87 tank
pcm and harness are original to the engine
Shorty headers and a 1500 stalled converter are the only mods.
Swap has been up and running about year but never right. It has stumbled on acceleration consistently, especially after coming to a stop. I looked at a tune in a the repository and it has made it much better. Added some timing and took some fuel away.
Not expecting the truck to scream around town, just drive good w/ a little better fuel mileage than the old tbi 454.
The bank 1 Ltfts seem to be off the charts but this is the only thing I have looked at.
Would appreciate you guys taking a look at the tune to help me figure it out. I expected the stock tune to run fine. Not sure what the issue is.
Thanks,
Chrisburbnew1.hpt7 20 17 1.hpl