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One minute fine next minute knock?
Posted: Tue Apr 24, 2018 7:23 pm
by Wade
Any ideas? Stock tune running fine. Next day same tune and getting knock everywhere
Re: One minute fine next minute knock?
Posted: Tue Apr 24, 2018 8:17 pm
by immortality
FPR, fuel pump, stuck injector?
What mods, anything worked on before the knocking issue occurred?
Re: One minute fine next minute knock?
Posted: Tue Apr 24, 2018 8:31 pm
by Wade
Everything stock l67 from my understanding. May have a very mild cam and unknown comp je forgies
Re: One minute fine next minute knock?
Posted: Tue Apr 24, 2018 8:35 pm
by Wade
Owner has told me he hasnt made any changes since yesterday. Was running fine yesterday but today its got knock everywhere. He says the exhaust is rattling. Could it be failing ignition or the exhaust rattle? Fuel looks rich in the logs
Re: One minute fine next minute knock?
Posted: Tue Apr 24, 2018 8:42 pm
by immortality
LOL, what changes did he make before yesterday?
I wonder if this is the same guy who's been asking questions on the JC forum? I think he had a sick L67 and was going to put new rods/pistons in it from MACE or something along those lines? There is probably a bit more to this story me thinks.
Stuck open injector, one pot will be extremely rich, PCM will pull fuel from that bank and make the other cylinders run lean. Check the fuel trims.
Re: One minute fine next minute knock?
Posted: Tue Apr 24, 2018 9:10 pm
by Wade
Yeah very much could be. Ill post the logs he sent me later