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fuel pump anomoly

 
Old 03-09-2019, 08:06 PM
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I had a similar issue with mine a few years ago.
Sometimes it would start almost normal, others it would crank for 8-10 seconds before starting. Once running, never an issue.
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Short version is I changed fuel pump, filter, pressure regulator, crank sensor, cam sensor, cleaning MAF, all with no change.
Finally had to bring it to a shop, took them a day to figure out it was a failing PCM. It would intermittently delay the signal for spark and injectors.
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Old 03-09-2019, 10:33 PM
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Originally Posted by blupupher View Post
I had a similar issue with mine a few years ago.
Sometimes it would start almost normal, others it would crank for 8-10 seconds before starting. Once running, never an issue.
Thread with details

Short version is I changed fuel pump, filter, pressure regulator, crank sensor, cam sensor, cleaning MAF, all with no change.
Finally had to bring it to a shop, took them a day to figure out it was a failing PCM. It would intermittently delay the signal for spark and injectors.
I remember that. I didn't think of checking coil and injector signal back, that would of clued us in to a problem with PCM signal. Could of did that with a noid light. Yea, didn't think of it.
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Old 03-10-2019, 01:16 AM
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Originally Posted by Jbrew View Post
I remember that. I didn't think of checking coil and injector signal back, that would of clued us in to a problem with PCM signal. Could of did that with a noid light. Yea, didn't think of it.
Yup, it was a PITA. 2 months of dinking around.
The noid light on the injector is what the mechanic finally used to close in on the problem.
2.5 years later and no problems with that (knock on wood).
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