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Old 10-14-2014, 09:14 AM   #1
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Flashing Check Engine light, Random Misfire code

Hello, Recently i have had an issue with my check engine light being on constantly with a diagnostic code P0340 which was the camshaft position sensor code, But on top of that the car has been misfiring and if i accelerate to hard the light starts flashing and thats when i get the code P0300 random misfire doesn't tell which cylinder is misfiring. Things that have been done to the car recently (changed plugs and plug wires, fuel filter, and the camshaft sensor) which took care of the constant light it is no longer on. but i still get the flashing if i push the car to hard, it does not run rough all the time just while accelerating fast. the light flashes for 10 to 20 sec. and then it stops and the car runs fine. I am at my wits end with this car what else could it be? maybe a faulty Coil pack? bad plugs and wires even though they were just changed? the altenator has also been tested and is fine it was just replaced last year. I just dont want to keep dumping money on parts i don't need..Thanks in advance.
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Old 10-14-2014, 09:58 AM   #2
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In my case it was the coil pack.
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Old 10-14-2014, 10:04 AM   #3
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Thanks! that was going to be my next step, is there any way to test them before i buy another?
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Old 10-14-2014, 11:49 AM   #4
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You can test them with an ohm meter but no need to it is 100% a coil pack that's what happens when they go.


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Old 10-14-2014, 12:57 PM   #5
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If i wanted to check first , is it done on the car or do i have to take the coil pack off? maybe a pretty silly question..lol
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Old 10-14-2014, 04:38 PM   #6
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Can either way unplug it and test it by checking ohms on each circuit.


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