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Blaine Cornelius

OBS Enthusiast
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Was driving along thinking about how good my truck was running and all of the sudden it wasn't.

Missing consistently and backfiring. Put it on the code reader and all I have is the multiple misfire P0300 or whatever. Posted are the stats. I compared it to one of the others in the driveway and couldn't locate anything remarkable... what say you?



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And here is the frozen data from when crap went awry

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Last edited:

90halfton

I'm Awesome
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I have no idea what your Gameboy is saying (lol), but multiple misfire seems to always be an ignition issue. Check all cylinders for spark. Possibly plug, coil, dizzy, some kind of ignition control module (depending on what your working on). Check for spark and go from there.
 

Blaine Cornelius

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New cap and rotor and plugs. I pulled the cap and checked everything. All looked good. Literally went from running perfect to crap in a second


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Blaine Cornelius

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Fuel psi was on point. Swapped the BW cap out for an AC Delco and she is running like a champ now. I guess this is a common issue on the plastic caps


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dhunt

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Had the same issue. Wires fixed my issue. You didn't say you changed those. I don't care if they look new or have been replaced less than 25k ago they can go bad


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dhunt

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Oh didn't see you fixed it.


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