Question about 2001 Chrysler 300M

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In neutral car is not going more then 4000 rpm

300m 2002 in neutral is not going more then 4000 rpm.why?

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I'm having the exact same problem with a completely different car. I believe its a catalytic converter that's fried. The engine isn't able to push out the exhaust gasses at the higher RPM's and creates too much back pressure.

Posted on Feb 24, 2013

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Most modern vehicles have rev limiters that come into effect around the red line area on the tacho. engines today also are more ballanced than in yester year and can handle revs for longer . If your vehicle wont red line there could well be a problem with the catalitic converter. especially if you have used any leaded or bio mix fuel. Big question is do you have a tacho?

Posted on Nov 27, 2012

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The 300M is equiped with a rev-limiter. The technology is designed to protect the engine. It keeps you from blowing it up when it has no load on it...If it is driving and shifting ok, and you have no check engine light on...there is nothing wrong.
Why would want to rev the engine past 4000 rpm in neutral anyway? Max torque comes in around 3950 RPM...
If you keep reving it up in neutral you might throw the computer in to LIMP mode, then you wont go no where.
Hope this answers your question...

Posted on May 23, 2009

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