HAD2HAV2

First of all, the cruise works. Problem is it is very difficult to set. My foot has to be dead on speed for it to catch. Once the cruse takes control the speed of my C4 can vary as much as 8mph if the road is not flat. I’ve tried to adjust the cable but do not see the cable to the throttle body move.
I have replaced all vacuum lines and all the cables at the throttle body have been moved previously when I pulled the intake and Heads for rebuilding. What do I need to do to get the cruise to work like it use too. Thanks.

don hall

Didn't read through the write-up, but may help (?):

http://www.superchevy.com/how-to/vem...ontrol-repair/

HAD2HAV2

I read through that site and did a search, was not my problem. I did a search and found nothing about adjusting the Cruise nut. Do I turn it clockwise and counter clockwise to shorten the cable? I could tighten by shortening the chain by one link. Don't know what to do.

Cliff Harris

Does it increase the throttle opening on upward inclines and decrease it on downward inclines? If it does then this might be normal. I just read recently that there have been problems with some servos that allow the speed to vary up and down. The only fix is to replace the servo.

The servo takes up the slack automatically. You should have a very slight amount of slack in the cable at the throttle body (to prevent the cruise control from affecting your idle).

Here's another cruise control repair article:

http://www.superchevy.com/how-to/82001/

HAD2HAV2

Cliff, the answer to the first question is yes. The Servo must be the problem. Can the Servo be rebuilt? Going to search now.