98 Z28 m6 low rpm stumble/miss fire
04-09-2014, 05:46 PM
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98 Z28 m6 low rpm stumble/miss fire I have a 98 Z28 m6 lq4 swaped with all stock fuel system and I am having a low rpm miss fire or stumble it happens between 1000 1500 rpm and only after it has warmed up when it is warm a slight miss on start up but idles fine and open throttle is just fine with no miss fire only does it under load and in the specified rpm range. it has 6k since swap 80k short block and 6k on msd streetfire plug wires e3 plugs new o2 sensors fuel pressure is 55 psi running, and not showing any codes the swap has been done for two years problem just started the other day .
Last edited by Z28nut; 04-09-2014 at 06:35 PM.
04-10-2014, 06:51 AM
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Do yourself a favour and lose the e3 plugs. Those things are nothing but trouble. They've given me headaches in literally every car I've ever put them in. Swap them out and see if that fixes the issue.