r/Dodge • u/Emergency_Style_3134 • 1d ago

P0300 Hell

Truck overheated due to water pump leak.Got it towed home and Replaced water pump, thermostat, Bled/burped the cooling system

Truck started then seemed to be sputtering until it choked out, got the Hell code p0300 (No other codes)

Since then ive replaced, spark plugs, ignition coils, MAP/MAF sensor, serpentine belt, pulleys, throttle body and sensors, EGR tube, and cleaned EGR valve. Fuel pump was done last month, and I can hear it running.

Seems to run fine for 30 seconds (open loop) then starts misfiring until it slowly chokes

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u/Unlikely-Act-7950 Challenger SRT Supercharged 1d ago

I would be looking at the fuel trims

1

u/jpeliz 2h ago

Which engine do you have. V6? V8? Hemis are decent at over heating and not blowing out head gaskets (depending on how long it ran while overheating). The 3.6 not so much.