01 Chevy 2500 HD Random misfire
I have a 01 Chevy 2500 HD its been sitting for 2 years so i pulled it out of the weeds and done a few things and i need a little help trying to diagnose a problem.
its throwing a random misfire P0300 i believe,,,,,, with a service engine soon light FLASHING. replaced.. transmission oil oil filter fuel filter air filter plugs wires coil packs cleaned the mass air flow sensor also ran sea foam and 2 tanks of fuel through it however i have a "service engine soon" light that only goes off SOMETIMES!! when cruising about 50-55mph OR!!! slowing down to a light or stop sign. Any advice will be greatly appriciated and followed up on. |
I'd suggest go back through check everything, i.e. plug wires on tight. You have a general misfire according to your post, might be worth pulling the fuel tank, and possibbly replacing the fuel pump. At least check for anything that could be obstructing the pump
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thanks yeah i figured that would be my next step.
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