Question about 2000 Chrysler 300M

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My car was hooked to a machine and it said the number 2 cylinder is misfiring. What do I need to check out?

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First thing is the #2 spark plug. Pull it and see how it looks. Is it burned up? is it black and oily? Is it wet and smells like gas?

If it is wet and/or smells like gas (most likely problem), either the spark plug wire or the coil pack is bad. I am not familiar with the 300M so you need to see which you have- either a spark plug wire going to a distributor cap or a coil pack that plugs directly into the spark plug.

If you have a coil pack you can swap it with another cylinder and see if the problem also moves, which will prove that it is bad. If your Chrysler uses spark plug wires going to a distributor, I recommend changing the entire set because if one failed, others may follow suit. Make sure that you install each one at a time so they connect exactly how they came out and you do not compromise the firing order (just in case, check the underside of your hood for the emissions sticker, which will have the firing order information).

If you pull the plug and it looks burned up, or black and sooty, you have another problem that will require further looking into. Keep us informed on FixYa and we are always glad to help!

Posted on Mar 18, 2011

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Most of the time on the 300m 3.5 it is the coil on that cylinder. Replace the coil on cyl #2 it pretty easy. It is just 2 torxs screws and a 2 wire plug that unplugs. Once the screws are out and plug is unhooked just pull up on it and it should pop right off the spark plug. Replace the coil and long boot(its one piece) with a new one and you should be good to go. They are about $85 buck at the parts store.

Posted on Mar 18, 2011

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Sirwriter

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