Cruise Control Surges

Jul 03, 2003 1 Replies

So here is the deal. The cruise in my '95 Bonnevile works. It turns on, and keeps the car going at the determined speed (within a few miles per hour) but the ride is terrible. If you could get seasick in a car this will make you do it. When the cruise control is on and set, the car will rev to that speed, then let up, then rev to that speed again, and let up. It continues to do this until you turn the cruise off, or throw up and wreck. These pulses last for about a second, with maybe three or four seconds between each one. It is no different than if I were to push the gas pedal, let off of it, and repeat that process. So can anyone tell me where to start? My little bit of reading says to replace the servo, but I don't understand why, really.



I also get a similar affect when I have the A/C on, but to nowhere near the power difference of when the cruise is on. Seperate issues, I'm sure.



THanks,



-Jeremy


Pontiac failed to duplicate my cruise trouble in late 1992. I think they wanted to wait till the warranty run out a few months later. My car was also criusing along and speeding up & down. Felt like driving a rocking horse. Only differance on mine it would also shut itself off on ocassion. My buddy who works in parts & my usual mechanic tended to think it was the Servo unit causing the problem.

I let it go a for 6 months as I wasn't in vacation mode ( cruise time ). On a weekend trip in May of 93 it was still acting up. Once summer hit I bought a new Servo, I think it cost $199 in June of 1993.

The problem disappeared and for the last 10 years the car has been surge free.

Good Luck.

========= Harryface =========

1991 Pontiac Bonneville LE ~_~_~259,100 miles_~_~~_

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