If you have cruise control, it is possible the cable came off and is holding the throttle open. Automatic idle speed motor can't raise rpm that high. First, look for a vacuum leak. Friend had a minivan that developed a 1" long missing section in the intake manifold the thickness of the gasket. Van ran 35 mph without touching the gas pedal.
What does the gas pedal feel like when you press it? Normal resistance? Normal length of travel?
If you have cruise control, and nothing else pans out, pull the rubber vacuum hose off the servo and plug it. If idle speed is ok now, we need to figure out if something happened inside the servo or if the engine computer is commanding it on.
Thursday, April 16th, 2009 AT 2:22 AM