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Old 07-17-2012, 11:28 PM   #1
PoorCollegeKid
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Question rpms jumping from 2500/3000 to about 4000/4500

i have a 2000 dodge neon, automatic transmission, and recently it has been lurching forward on the highway at certain speeds. i have been keeping my foot steady on the pedal but at like 75 mph the car will lurch forward and backward and the rpms will jump between like 3000 and 4000 (the car was steady at about 3000 to begin with). when i go down to about 70 the car drives fine, so what could be the problem and how can i fix it?
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Old 07-18-2012, 08:54 AM   #2
das2123
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Re: rpms jumping from 2500/3000 to about 4000/4500

Could be a simple misfire problem. Spark plugs, fuel injectors and/or fuel pump.
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Old 07-19-2012, 12:20 AM   #3
PoorCollegeKid
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Re: rpms jumping from 2500/3000 to about 4000/4500

the spark plugs were recently replaced. but the fuel pump makes sense. ill have to check it out my next day off. thanks!!
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