My 07 Chevy Tahoe cyclinder 4 Misfire

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Hardchevy

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Jan 15, 2015
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hey guy
....I really need for this problem to go away
i have changed all my spark plugs and wires ....also all my coil packs and the #4 injectores
 

Hardchevy

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It says p0300 and sometimes it reads p0521 oil pressure sensor ... but right now its just saying p0300 ... I hooked the Genisys hand held scan system up to it and thats what its reading
 

Ojustracing

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The P0300 a random misfire code. Are you looking at the Misfire counter? Does it feel like it is misfiring? or can you feel the skip?
 

fjmichaels

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Might want to check O2 sensor wiring or sensors themselves. I had a random misfire (SES flashing) especially when it rained. Turned out to be a damaged O2 sensor wire.
 
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