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Very persistent misfire, help

I know it’s 3 and 5 because the manifold temps out of those are significantly lower than the other 6, I also got a lean bank 1 code just this morning after not throwing any codes since I’ve had it. All of the valvetrain is okay but I haven’t done a compression test yet.
- BillyGoat
- Post #6
- Aug 1, 2021
- Forum: Engine Performance + Maintenance
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Very persistent misfire, help

I picked up a 2000 k2500 with a 454 a few months ago and I’ve been trying to fix a misfire since then and I’m out of ideas. It seems the misfire is most noticeable when under load under 3k RPM, or at idle. Cylinder 3 and 5 are the ones misfiring. I have replaced the MAF sensor, IAC valve, EGR...
- BillyGoat
- Thread
- Jul 31, 2021
- Replies: 11
- Forum: Engine Performance + Maintenance