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GMC Forum: "Multiple misfire on plugs." Code when Ck eng light
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Old 06-15-2018, 10:51 AM
MartyDufrene MartyDufrene is offline
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Drives a GMC Truck
Join Date: Apr 2016
Posts: 2
Default "Multiple misfire on plugs." Code when Ck eng light

I bought the truck a few years ago. I changed the plugs,wires and rotor n distributor cap. Through out the last year annd a half I had changed wires a 2nd time shrting and also coil wire shorting so i replaced wire. with all that shorting most likely culprit now would be the poor coil right? Would the low fire level set the computer off. Im getting 80 miles to a tank..nightmare
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Old 06-25-2018, 03:49 PM
OnlySonoma's Avatar
OnlySonoma OnlySonoma is offline
Drives a 1995 GMC Sonoma SLS Extended Cab 4.3L V6 TBI RWD
Join Date: Aug 2016
Location: BC CANADA
Posts: 81

The next thing I would replace is the Coil.

Story Time:

When the coil on my Sonoma was on its way out, it would still work but it would also arc a big spark to the closest piece of metal. I noticed it one day while it was dark out and I was looking in to the engine bay. The arc was about 1 to 2 inches long and was very bright. It also made a slight ticking noise, which i believe was the sound of it arcing. The engine still ran, but would misfire.
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Old 10-29-2018, 05:48 PM
dirtygirls96stillrollin dirtygirls96stillrollin is offline
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Drives a 96 GMC Jimmy 4.3 , 02 WJ 4.7, 11 Pathfinder 5.6
Join Date: Oct 2018
Posts: 2

I ran E3 spark plugs one time and my Jimmy didn't even want to run. I have to use OEM/ACDelco plugs and wires.

Last edited by dirtygirls96stillrollin; 10-29-2018 at 06:02 PM.
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multiple misfire code
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