capacitor failure causing fuel pump to over prime? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 3 Old 03-27-2019, 10:10 PM Thread Starter
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capacitor failure causing fuel pump to over prime?

I finally got my car idling good and as I started to heat cycle the motor (bring it to operating temp/shut it off/let cool/repeat) to look for leaks etc, I started to notice that on occasion my fuel pump would just continue to prime.
Once it got to the point that it was very difficult to start the car, I decided to call it quits.

Fast forward a few days I decided to take apart the ECU and I noticed that the capacitor closes to the J3 port was busted. I found a few posts on the internet stating that ECU failures can cause the fuel pump to continually prime.

Is this blown capacitor my problem?


'01 GT:
YSI, 20lbs
89 LX:
347 stock
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post #2 of 3 Old 03-28-2019, 09:14 AM
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could be

so can a partially powered ecm

check for 5v reference or scan for codes, and see if you can comm with it


89 GT gr-40, KB2200(10psi), tweecer R/T,LC-1, 22gal cell, w/tailpipes.
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post #3 of 3 Old 04-09-2019, 09:43 PM Thread Starter
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I ended up replacing the capacitors on the circuit board and it fixed my fuel pump priming issue. Two of the capacitors were leaking.

'01 GT:
YSI, 20lbs
89 LX:
347 stock
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