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rpmdiag, Tech and Instructor
Category: Ford
Satisfied Customers: 7723
Experience:  Since 1975
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What can cause the fuel injectors to not fire

Resolved Question:

what can cause the fuel injectors to not fire
Submitted: 8 years ago.
Category: Ford
Expert:  rpmdiag replied 8 years ago.



A wiring problem, blown fuse, bad computer or a security problem can all cause this. Here's a PIC of how the injector should look when firing good.


Thanks for your question and positive feedback,





Customer: replied 8 years ago.
It is intermittent...seems to shut off completely & comes back on it's own when it wants. v6 1994
Expert:  rpmdiag replied 8 years ago.

Well, have you confirmed that the injectors are not firing?





Customer: replied 8 years ago.
only thru process of elimination...engine will start with starter fluid sprayed into the intake, and fuel is pressure up at test point & injectors were changed
Expert:  rpmdiag replied 8 years ago.

Check for a strong blue spark at the plugs when it won't start. Check fuel pressure and volume with a guage too. Also, I can still help you after you have ACCEPTED too.





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