96 burb 7.4 misfire after 5.0 injectors

[mehcs]

Can rule out injectors since I jumped the fuel pump while plenum was off to make sure there were no leaks.

Faulty FPR!!! Holey smokes. Put another new one in and bingo!!!

Had one or two misfires so will check for vacuum but it running like it should. For t he most part…

 

[Keeper]

Great news!

From personal experience, if continuing misfires after injector replacement.... when you checked injector spray with plenum off, were all injectors fully seated down equally? I know I had to fart around with a couple of them to get them fully fully down, even though they appeared fine from above and did not leak. I almost replaced the engine out of frustration while chasing that little issue down. Hopefully, it's something simpler.

Mainly posting for future readers that your thread title may bring in.

 

[mehcs]

Great news!

From personal experience, if continuing misfires after injector replacement.... when you checked injector spray with plenum off, were all injectors fully seated down equally? I know I had to fart around with a couple of them to get them fully fully down, even though they appeared fine from above and did not leak. I almost replaced the engine out of frustration while chasing that little issue down. Hopefully, it's something simpler.

Mainly posting for future readers that your thread title may bring in.

I know what you’re saying. The first time I put the injectors in, they were not equal.
I looked at the tips in the chamber and all seemed pretty darn close.

 

[smokymtn65]

So frustrating to get new parts that are junk. Glad you found the issue.

 

[RichLo]

Well, you helped me decide to leave the OEM FPR in when I switch injectors this spring. Current fuel pressure is right where it needs to be so no need risking getting a bad part.

 

[smokymtn65]

I left mine when i did injectors also.

 

[mehcs]

Moving on to something less stressful.

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