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A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6642
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
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Going down the road at 40 mph, I take my foot off gas, the

Customer Question

Going down the road at 40 mph, I take my foot off gas, the car will not slow down. If I put car in neutral while this is happening, the rpm, is 1500, goes up to 2200, what is wrong?
Submitted: 2 years ago.
Category: Ford
Expert:  A. Penland replied 2 years ago.
Hello and thanks for using JustAnswer.I will try my best to help you with your question.
this problem can be caused by a vacuum leak or a dirty throttle body causing the throttle plates to stick at part throttle. Have the throttle body cleaned properly and also have the intake checked for a vacuum leak. The intake has rubber o rings that seal them together. When they leak, they allow extra air to enter the engine and this in turn will bring the rpms up.