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TrailblazerSS
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Discussion Starter #1
can someone tell me I am getting code p0300 multiple or random misfire a slight miss plus I am getting oil in my k&n filter and at the opening of my throttle body I was getting p0307 misfire cyl. 7 but I changed the plugs wires and cyl 7 fuel inj now p0300... what to do?
 

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TT AWD TBSS Jeep
TT AWD SS Pwrd Jeep
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5,825 Posts
What mods do you have? The 300 random misfire can be caused by a 3600 converter as crank harmonics are differant. Start with all new plugs and wires. Ohm injectors, check for corrosion on coil pack and inector connectors. Including the bulk connecter and each individual connectors. I that all passes then check connectors for cam and crank and all engine grounds for corrosion. One on front pass head, three up front below the drivers side manifold and any ones that go to the fender area up high. Another person has a similar thread recently going thru same thing. Other ideas in there as well I cant think of off the top a my bald head.... lol
 
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