Misfire

Asked by Mar 05, 2017 at 07:17 PM about the 2010 Dodge Ram 1500 Laramie Quad Cab

Question type: Maintenance & Repair

My ram 1500 is showing misfire on cylinder 3.
Replaced all plugs,  replaced coil pack,  checked
compression is good.  Where do i go now, it's
actually a2011 model but no option for that year

1 Answer

77,815

P0303 DODGE - Cylinder Misfire Fault Detected...Possible causes; Faulty spark plug 3, Clogged or faulty fuel injector 3, Faulty ignition coil 3, Fuel injector 3 harness is open or shorted, Fuel injector 3 circuit poor electrical connection, Ignition coil 3 harness is open or shorted, Ignition coil 3 circuit poor electrical connection, Insufficient cylinder 3 compression, Incorrect fuel pressure, Intake air leak...The P0303 code means that the cylinder 3 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 3. If the problem persist more tests needs to be done to diagnose problem.

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