06 chrysler 300 2.7 l v6 misfires randomly some times it runs great others it wi;ll misfire itoverheated and the next day drove great

Asked by Apr 02, 2017 at 07:34 AM about the Chrysler 300

Question type: Maintenance & Repair

some daysno problems othr days will misfire overheat

2 Answers

74,605

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... This 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.

74,605

The overheating is something else to look at. Make sure the coolant level is full, and the fans are working on the radiator.

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