Hey everyone to start off here is what has been done to my 1989 Chevy S-10 4.3 liter Vin Z Computer #1228062.
*All cylinders bored 30 over
*New Pistons (do not have in front of exact ones)
*Comp Cams Cam,Springs,Hydraulic lifters and Roller Rocker arms Part # 09-420-8
-Camshaft C43 270H-R10
*96 and up Vortec Heads
*2114 Edlebrock Performer Intake manifold
*Stiffer spring in TBI Regulator that pushes pressure from 13 to 18.
The Prom I have in the computer now is the stock prom with Main Spark table changes to more of a vortec type table and EGR dissabled. The problem that I am having is that when I fire her up she runs good at idle nice and smooth. I throw here in to drive and head out and for the most part runs fine no problems until I try to accelerate with the pedal more than half way down to WOT my truck stumbles and hesitates but then if I just give the pedal a little push it gets going accelerating normally. My wideband 02 sensor shows a really lean mixture during the stumble like somewhere around 22.3.I have attached my latest data log its not way long but shows the problem. Thank you for the advice and opinions in advance im pretty much at a loss at this point.reference.
Bookmarks