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  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

Electrical interlock?

  • Thread starter Thread starter garycroix
  • Start date Start date Jan 16, 2007
G

garycroix

New Member
Sep 16, 2005
39
0
0
GA, wish it was NC
Jan 16, 2007
#1
  • Jan 16, 2007
  • #1
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
 
F

ForceFed70

That's why they call it "dope"
Founding Member
Dec 6, 1999
4,818
1
69
BC Canada
Jan 16, 2007
#2
  • Jan 16, 2007
  • #2
The injectors won't fire unless the ECU is getting a tach/RPM signal. Maybe start looking there?
 

red65

Member
Apr 12, 2003
411
0
17
Ann Arbor, MI
Jan 17, 2007
#3
  • Jan 17, 2007
  • #3
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
 
M

mustangdave

My rearend needs a stud and two nuts.
Founding Member
Feb 26, 2002
2,976
1
56
North Carolina
Jan 17, 2007
#4
  • Jan 17, 2007
  • #4
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.
 
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