My 1992 Ford Aerostar has an extremely high idle while in park and neutral. When driving, it accelerates on it's own to about 35 mph. When I brake, it tries to lunge forward. This happened several times before and after driving at high speeds down the highway but always went away. Now after driving on the highway this weekend, it is still acting like it's going 60 mph at all times! Please help. I'm thinking about replacing the Throttle Position sensor. I cleaned the throttle body and that did not help. Thanks so much!
Yes, I recommend taking a look at the Throttle position sensor TPS. Your description sounds like a characteristic of a failing TPS.
〉 Answered on Nov 4th, 2013 by Amanda J. Pierce, MBA "AJ", Certified Mechanic, Project Coordinator; Primavera Scheduler at VIGOR Alaska Industrial Shipyard & BizzM3ch Solutions
If there is no check engine light on, it's most likely not the sensor.
Best guess is its something wrong with the throttle cable.
Whatever it turns out to be its not safe to be driving this vehicle.
I recommend you tow it into a repair shop for a proper diagnoses and repair.
〉 Answered on Nov 4th, 2013 by Amy Mattinat, Owner and Author at Auto Craftsmen Ltd
You should find a place with a diagnostic tool and have it analyzed.
〉 Answered on Nov 4th, 2013 by Barb Petrey, President - DBK Enterprises Inc at Jiffy Lube
Start with checking for a vacuum leak, possibly a line disconnected. I would get it checked out by a good auto tech as a car that wants to accelerate on its own is not a good thing.
〉 Answered on Nov 4th, 2013 by Helaine Kurot, Owner/Technician at 360 Automotive