Question about Chrysler 300

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I have a 2005 Chrysler 300 Touring my engine light is on and went to get the test done it came back cylinder misfire detected can this be the cause of my engine knocking

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The Chrslyer engines are prone to carbon build up in the engine when they are not driven hard. When the misfire occurs the engine runs rough, the car shakes a bit, and the check engine light comes on. The good news is that this is a recognized issue at Chrslyer. There is a Technical Service Bulletin (TSB) out for this. Synchronicity in the Universe being what it is, my car is in the shop at this moment being serviced for this very same thing. It is a 2002 300M Special Edition with 57,000 miles on it. I haven't been driving it as much because I started taking a commuter train to work and when I do run it, I do not let the engine get up to operating temperature nor do I run it at highway speeds - thus the carbon build up. You may simply need to have the carbon blown out of the engine. Talk to a Chrysler Tech about a TSB for carbon build up leading to intermittent engine misfires and see if this might be at the bottom of the problem.

Posted on Sep 24, 2009

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A misfire is usually bad plugs and/or wires.
I don't know if it would cause a knock... that is usually a worse problem... check your oil and make sure its not a white-ish color... if so your head or head gasket is shot.

Posted on Jul 25, 2009

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b) spark plug wires - change them if over 15K miles - inspect
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The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or
Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be
lit - the code coming from your truck's computer will probably be one or more of:
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P0302 - Cylinder 2 misfire detected
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P0306 - Cylinder 6 misfire detected
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