Glock's new project: "Fred" w/ 5.3L LS swap info

[68 TT]

Originally Posted by glock35ipsc

True, but my experience with VATS is that it will start, but die shortly after.

Short of checking spark and power/ground to the injectors, I am leaning towards stuck injectors.

When I put a 93 LT1 & 4L60E into my 67 Chevelle the VATS was not disabled in the programming at first. It would fire while in the start position but die as soon as the key was transitioned back to the run position.

You could spray a little fuel in the throttle body and it would fire up and run for a second.

After getting the chip programmer to do it right the thing fired right up.

My motor had been sitting for close to two years with no injector clogging issues.

VATS may not be disabled in your PCM.