Electrical interlock?

[garycroix]

93 EFI engine into 66. Thought it was a spark problem, but I got that fixed. Now it is fuel. Fuel pump runs and I have fuel pressure at rail. For some reason, apparently the computer is not telling the injectors to spray. Is there some interlock between engine compontents/relays that I am missing? I know the ECM has to know that your fuel pump is running, that is in place.
I do not think it is a ground problem, as I grounded the wiring harness to the battery just to get it running. I am not getting the noid light to blink when I crank it over. Any help would be greatly appreciated! Thanks.

Gary in GA

 

[ForceFed70]

The injectors won't fire unless the ECU is getting a tach/RPM signal. Maybe start looking there?

 

[red65]

Hi Gary

How do you know that the injectors aren't working?

What's a "noid" light?

Can you provide some background on what your spark problem was? There's a fair chance it's related. Also, have you retrieved codes from your EEC? If it's missing signals, the error codes will often provide some clues.

- Andy

 

[mustangdave]

A noid light blinks when the injectors fire so he knows they aren't working. I agree with tracing the signal to the EEC to see if the firing signal is being sent. Then trace it back to see if it is wired to the injectors.