Hi team

experiencing a no start condition. Key in, security light comes on and goes out, turn key to start (with clutch pressed)and nothing; temp gauge pegs, wideband cuts out; all normal stuff but no crank

clutch safety (green and purple) link up fine with clutch pressed and bypassing the starter relay (connecting the big green and yellow wires) has it cranking and stumbling for a few seconds then dying (presume no injector pulse)

VATS disabled in bin

stumped! Thoughts really welcome

 

Given this statement; "VATS disabled in bin" I'd think once you got it to crank the starter, and it stumbled for a few seconds, I'm not so sure VATS is your problem. How could it be, since the ECM has effectively been programmed to ignore it?

I'd be inclined to do a noid light check, fuel pressure check, and check the spark for good measure.

 

Thanks Orangebird

just seems odd that it doesn’t crank unless I bypass the relay and then won’t run but for a few seconds. Rinse and repeat. Plug the relay back in and nothing

Fuel pressure is good and can hear the pump prime

but fair and not impossible a few systems have been knocked out here

 

What happens if you disconnect the EST connector and take away ECM spark control?

 

thanks - see the car on weekends (lol, sounds a custody arrangement) and so can play about with it then.

Curious, what's your thinking with pulling the EST connector ULTM8Z?

 

When you say it won't crank unless you bypass the relay are you talking about the starter enable relay inside the driver side kick panel?