Number 8 cylinder misfire

Asked by Mar 21, 2018 at 12:31 PM about the 2000 Jeep Grand Cherokee

Question type: Maintenance & Repair

#8 misfire

4 Answers

120

Check the plug check the coil check the coil wires

1 people found this helpful.
120

Check the plug check the coil check the coil wires, best way to do that is a swap the wires from #8 with the cylinder next it. Then you see if the code from the check engine light follows the coil or stays with cylinder 8. Good luck!

1 people found this helpful.

Put in new coil and plug. Still reading #8 cylinder intermittently

65

Either 1) clogged / broken fuel injector or 2) bad / corroded coil wiring harness. Good thing you replaced the plugs and coils first, since that's usually the easiest-to-fix cause of a misfire. Since its not that, I would run SeaFoam through to unclog all your injectors anyway, and see if the misfire occurs after the unclogging. Next, replace the wiring harness / wires to cylinder 8, as that will be cheaper than getting a new fuel injector. Hope this helps!

1 people found this helpful.

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