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What can cause the fuel injectors to not fire

Customer Question
what can cause the fuel injectors to not fire
Submitted: 8 years ago.Category: Ford
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Answered in 4 minutes by:
6/7/2009
Ford Mechanic: rpmdiag, Tech and Instructor replied 8 years ago
rpmdiag
rpmdiag, Tech and Instructor
Category: Ford
Satisfied Customers: 8,407
Experience: Since 1975
Verified

HiCustomer

 

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,

 

Ron

 

graphic

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Customer reply replied 8 years ago
It is intermittent...seems to shut off completely & comes back on it's own when it wants. v6 1994
Ford Mechanic: rpmdiag, Tech and Instructor replied 8 years ago

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

 

Thanks,

 

Ron

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Customer reply 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
Ford Mechanic: rpmdiag, Tech and Instructor 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.

 

Thanks,

 

Ron

rpmdiag
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