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I have a 2001 Ford Escort. It was idling rough and starting to cut out when sitting at stop lights. I changed the plugs and within a week the Check Engine light came on. It is still idling rough but not cutting out. It runs fine on the highway, no hesitation. I had it checked and they said the cylinder 3 is misfiring. I have had the injection system cleaned, put on a new PCV sensor and put new plugs and wires on. Also I put a new fuel filter in. What else can this be? I would appreciate any help in finding out the problem. My gas milage has suffered since I have done all of these things! Go figure!

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  • minnisdebora Feb 23, 2009

    Thank you for some input. I will have to check out these two things.

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Well the misfire in Cylinder 3 will commonly be that your plug has gone bad. If that is the only code that it is throwing out then it could be an array of things going on. It sounds though that you may have a throttle position sensor out or that you have your idle speed set too low. You will still have great response when gas is applied but sitting at lights the idle will be rough and sometimes bounce up and down.

Posted on Feb 23, 2009

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