P0300 Chevrolet - 1999 Blazer

Question

I get the hesitation. My scanner reads P0300. I have replaced plugs, wires, coil, a new loaded distributer. I have good fuel pressure. Fuel pressure does not bleed down. I replaced mass air flow sensor a month ago. Any help will be appreciated.

Answer 1

P0300 Random misfire

Does the oil smell of raw fuel? The fuel injector have a high tendency to plug and cause the rough idle. The cylinder valve have a tendency to bind on this type of engine