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2005 Chevrolet Avalanche New motor plugs wires cam and crank sensor still missing with p0300. What is the next step?

Vehicle: 2005 Chevrolet Avalanche

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HI there

I would check the fuel pressure for a problem and possibly the mass air flow sensor. These can cause misfires n you. Also, check the catalytic converters for possible blockage. They will cause misfires as well.
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P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders

Read more: https://www.autocodes.com/p0300_chevrolet.html

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