cruise control does not work

1997 AUDI A4
160,000 MILES • 4 CYL • 2WD • MANUAL
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ELITEFIT1
  • MEMBER
  • 1 POST
I love my car listed above with a 1.8 turbo. Except for the electrical gremlins. My problem is that my speed control only works when it is really hot outside, and the car has been sitting in the sun for a while. I do not know how to even access it. I think it's on the right-side passenger underneath the glovebox?? but who knows!
Oct 7, 2010 at 8:43 PM
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KASEKENNY
  • ✓ASE Certified Mechanic
  • 18,907 POSTS
  • ASE Certified Mechanic
More than likely this is an issue with the cruise control vacuum pump. Within this system this is the only component that would be affected by heat. So, I suspect you have a leak in the line going from the pump to the servo.

So, we should connect the pump to a gauge and then drive the vehicle to find out if the pump is working.

Here is a guide that talks a little bit about this:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

The other likely cause is the servo itself.

I am attaching the info on how to replace this below so let me know what questions you have.

Thanks
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Jan 31, 2022 at 11:22 AM
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