On my 98 Camaro something started happening everytime I try to go WOT. Something is turning the injectors off. I think it's a malfunction in the PCM or coming from the BCM. I tune with EFIlive and have turned VATS off. Is that suppose to eliminate the PCM's need for the signal from the BCM or do I need to dummy a signal? If so, how do you do it?

By the way...I was on a 200 shot the first time it did this and it wasn't pretty

 

I don't think VATS works after the engine is running.
Is it possible you are hitting the Rev Limiter?

 

That's why I think it's a malfunction. It shuts off as if switching it off. Sometimes it will do it as low as 3000-4000 rpms so I don't think it's the rev limiter.

 

that's not how VATS works.

 

Are you sure you're not just running out of fuel, ie. bad pump or blocked filter?

 

I'm pretty sure on the fuel supply. My wideband was showing 12.7-12.4 everytime it happened plus I have a fuel pressure guage in the car. I have watched it a few times and it stayed steady.

I clipped the signal wire to the PCM today and the motor still cranks and runs fine. But when I try to go WOT it still shuts down. Something is turning the injectors off.

 

VATS is start only. You can take any of these LS cars, throw the ignition key in the yard and start the car with a push button ignition going from the starter to battery.

I would look a little less at programs and a little more at basic connections if it were me. Make sure all pins are locked in location. Make sure all grounds are good. Ohm out some wires and see if you have any issues there. You could have a wire that has rubbed the insulation and is grounding out against something. You claim this happens at various RPM's, so I would look for a direct ground short happening with vibration and harmonics. Good luck.

 

having same issue on my 2001 ss any luck? mine has moved to dieing at idle now data logs dont show much at all...!!!??? frustrating

 

check the battery and make sure it is not tilting and hitting the + terminal to the AC canister, I've seen this once, and it will short the electrical system at full acceleration, and then come back alive.

Ryan

 

I had this exact same problem. It ended up being a broken ground eyelet on the back of the drivers cyl head.

 

Found my problem today! It was a defective crankshaft sensor. Runs perfect now.