Re: 1989 IROC Electrical Issue
Run a test light, like a 63 light bulb and socket, and ground one end inside the car interior and the other lead to the BAT terminal of the HEI.
This light will show if power is being lost when engine quits.
If engine quits and still stops, fuel pump relay, both relay control from the ECM and f/pump power terminal.
Black wire on the injectors is battery power from a relay. The colored wire on the injector is from the ECM and it places a low voltage (read close to ground) on this wire to open the injector.
No pulses from the HEI to ECM, no ignition nor injector pulses.
Give a man a rescued dog for the health of both their souls. May 2017 ROTM Winner - Thank you!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
CUBS - 2016 World Series Champions - Thank you, Joe Madden … enjoy your next chapter.