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The Jeep Grand Cherokee was redesigned for the 1999 model year; the 2000 models have minimal changes. This model is also known as Jeep WJ.

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I have code P0306 any help or suggestions?

Code says cylinder #6 misfire I've already replaced spark plugs and coil pack so i dont know what other thing it could be please help

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carlosleonardos,The P0306 code means that the cylinder 6 is misfiring or is randomly misfiring. Start by checking for intake leaks. Since you already replaced the plugs and the coil pack there are a more possibilities

# Clogged or faulty fuel injector 6

# Fuel injector 6 harness is open or shorted

# Fuel injector 6 circuit poor electrical connection

# Insufficient cylinder 6 compression

# Incorrect fuel pressure

# Intake air leak

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Could i Just buy injector cleaner at an auto parts place and see if that fixes it ??

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You could by I have never been impressed with that stuff. Nothing to lose I suppose, so you might as well give it a try.

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i waited a couple days to see because i bought an injector cleaner but my jeep is still doin the same thing shakes when im at a light or idle

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Then continue down the line with the trouble shooting. i.e. replace injector

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