Question about 1999 Dodge Dakota

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RPMs jmp I have a 99 dodge dakota. While driving with the cruise control on, the RPMs will randomly jump by about 200 or so to where you actually feel a jolt. Now its startig to do it when the cruise is not on. Any ideas?

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My 98 did the same thing and it took me over a year to catch the problem on a data logger or a scanner. It was the TPS.

Posted on Nov 22, 2008

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Had the same problem. In my case, the wiring harness was scraping against the vibrating motor and wore through the insulation. This caused the computer to think the throttle position sensor was bad and the RPMs were erratic. The engine light came on and indicated TPS. A short time later, more of the wires became damaged and the engine started missing cylinders. My problem was at the top rear of the engine where the harness runs over a metal stud (right behind the valve cover). Check your wiring harness. Not an easy find until you actually look for it specifically.

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JC

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