How much does it cost to repair a cylinder misfire?
Most auto repair shops charge between $75 and $150 per hour. The Engine Control Module (ECM) uses information from the crankshaft position sensor and the camshaft position sensor to determine when an engine cylinder misfire is occurring.
What to do if a Pontiac cylinder misfire is detected?
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 persists more tests needs to be done to diagnose problem, see “Possible Causes”. There is a factory service bulletin for the following Pontiac models:
Can a fuel injector fault be set during a misfire?
In Spark Ignition Direct Injection (SIDI) system applications, if a fuel injector fault DTC is set during a misfire event, the ECM will not re-enable the injector. Need more information on how to fix the P0300 PONTIAC code?
What causes a Pontiac P0300 to misfire?
P0300 PONTIAC 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
What to do if you get a P0300 random misfires code?
If you own a GM vehicle and encounter a check engine light and P0300 random misfires code, read this service bulletin #PIP5264 before replacing any parts. The bulletin applies to the vehicles listed below:
How does the computer know if a spark plug fire is a misfire?
To monitor these contributions, the computer looks at the crankshaft position sensor and correlates the acceleration speed of the crankshaft in relation to each spark plug fire. It expects to see a contribution immediately after firing the spark plug. If it doesn’t it figures there was a misfire.
What to do if your car has an ignition misfire?
GM has advised all dealers to inspect the condition of the automatic belt tensioner, the belt tension pulley, belt, and all idlers rollers plus the condition of the engine mounts BEFORE performing ANY diagnostics on the ignition or fuel injection system. Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period.