I have a 2001 s10 that came with the 4.3L and have transplanted a 5.7L vortec and flashed the pcm with the 2002 savana van tune. The engine is a 383 stroker with a pretty wild cam:
"XFI" 280 Hydraulic Roller Camshaft
GM 305-350ci 1987-98
Lift: .576"/.570" w/1.6 Rockers
Duration: 280°/288°
RPM Range: 2000-6000
i have no problem with the wiring of the injectors and the engine starts but has no idle qualities. i know i can't perform the crank relearn until the idle is established so i'm in a tough spot. i'm attaching a copy of my current tune so hopefully someone can adjust it to work or point me in the right direction. Thanks