420 surges while coasting downhill....HELP!

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420 surges while coasting downhill....HELP!

01-27-2003, 01:09 PM

gb*kw

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Join Date: Jan 2003

Location: South

Posts: 10

420 surges while coasting downhill....HELP!

Hoping someone can help me with this problem: (1986 420sel)while coasting downhill at any speed I am experiencing a decelerating surge...feels like someone is pressing the brake pedal on and off. One other thing that is occuring that may be related is a decrease in fuel economy....gone from 20 mpg to 13 mpg?

Any ideas...help?

gb*kw

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