Speed Control Cable Problems of Chrysler Pacifica

While leaving a on ramp to us route 15 s. I accelerated to wot(wide open throttle) in order to merge into traffic. Once I reached 60 mph I pushed the set button on the cruise control as I left off of the accelerator pedal. The vehicle continued to accelerate instead of holding the 60 mph speed. I slowed down by pushing on the brake pedal, but once I left off of the brake pedal the vehicle continued to accelerate. I tried the cancel button for the cruise control and also the on/off button, but nothing worked. My wife reached over and pulled the floor mat back to make sure it was not the mat and it continued. I placed the shifter in neutral and the rpm's were at 3500. I turned the ignition switch off and I coasted. I then restarted the vehicle and the rpms immediately went to 3500 and then dropped to 750. I am an ase certified master technician and this is the first time I have experienced this in a vehicle. I am glad I was driving and not my wife. Once I reached my destination I disconnected the cruise control cable at the throttle body. Since this vehicle is a cable operated throttle body my only conclusion is that either the throttle plate stuck, which it is currently moving smooth, or the cruise control is having issues. I am planning on taking it to work in the morning and trying to diagnose it. I have been repairing cars professionally since 1992. Starting in a Ford dealership for 8 years, then being self employed with my own auto repair business until my current position in an independent repair facility (ac delco tss shop) for the past 11 years.

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I own a 2005 Chrysler Pacifica with a sticky accelerator pedal. We took it to the dealer during the summer 2008 and we were told the throttle cable in the accelerator had carbon build up and had to be cleaned. The dealer cleaned it and it was fine until we had to take it back on 12/21/09. Again they cleaned the throttle cable. The first repair was covered by the warranty. The second time cost us $125. I believe our Pacifica has the same problem as the toyotas'. I'm sure we'll have to take it back again.

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