1999 Chevrolet Blazer Code P0300

Question

I have 99 Chevy blazer that has p300 code and can't figure out done change spider injector plugs and plug wires distributor cap rotor button fuel filter please help me with this

Answer 1

P0300 Random misfire

Mechanical condition now needs to be check , you can either do a leakdown test on the cylinder or a compression test of the cylinder. On more area to check is the EGR valve a slighly open pintle can cause random misfire without setting a EGR code condition. Exhaust back pressure can also cause random misfire

Answer 2

P0300 CHEVROLET - Cylinder Misfire Detected Random Cylinders

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