Misfire 2001 dodge ram 1500 5.9 v8
My trucks heater core went and that caused
my water pump seal to leak. Right before
that my truck started to shake and run
rough. I scanned it and it threw the random
misfire codes for cylinders 3 4 5 6, which
are the middle cylinders. Help!!!!!!
Did it overheat before you shut it down?
P0300 DODGE - Cylinder Misfire Fault Detected Random Cylinders.... Possible causes - Faulty spark plug (s) - Faulty ignition coil (s) - Clogged or faulty fuel injector (s) - Intake air leak - Fuel injectors harness is open or shorted - Fuel Injectors circuit poor electrical connection - Ignition coils harness is open or shorted - Ignition coils circuit poor electrical connection - Insufficient cylinders compression - Incorrect fuel pressure.... The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persist more tests needs to be done to diagnose problem.
I have never heard of a heater core taking out a water pump unless the engine has overheated and made too much pressure and blew it. So if that is the case then the likely hood of a blown head gasket is very high, and as you seem to have the problem on all of the center cylinders I would be leaning in that direction, your still going to have to fix the heater core and the pump no matter what you do.
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