Here is my problem. 89 Trans Am GTA with 350 TPI. This is weird but most of the time this thing will not start. Just cranks and cranks. Sometimes it will fire right up. When you turn the key on you can hear the fuel pump run and its always got good spark. The injectors are new Bosch III's, but when it dont start you can crank it and hold onto the injectors and tell there not pulsing. Doesn't seem to be related to temperature. I dont know if it's related but I already put 2 VATS relays in it. The one in the drivers kick panel. It seems to eat them quickly. But before if I jumped the 2 big wires in the plug it would start right up. So what would allow this to have good start but not fire the injectors and when it's running it will run all day long with no trouble?

 

VATS has two parts;
it takes out the starter and the injectors. Bypassing the starter enable relay only gets you the starter working.
Unless the computer sees the input signal from the VATS module it will not pulse the injectors so will crank all day
As it is a intermittent fault ,maybe bad connection from VATS module to ECM , maybe flaky VATS module

 

Hey VO, always there with the great information. It's appreciated by everyone.

 

injector fuse?

 

I get around

 

Thanks to vetteoz for that wiring info. I didn't know the VATS also controlled the injectors. I measured my key at 6000 ohms, cut the wires under the dash and wired a resistor inline. So far its been starting all the time like it should. Thanks for the help.

 

Great resolution, thanks for posting the result.

 

When do you sleep?