1992 Cadillac Deville

Tiny
SEAN03
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • 135,000 MILES
How do you pull a vacuum on a cruise control servo. I have a vacuum pump for the a/c will that work. Also how do you pull the vacuum on the servo. If I cant use the vacuum pump where can I buy the hand held vacuum pump. How many inches do I have to pull it to. Thanks.
Monday, April 9th, 2012 AT 10:21 PM

7 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So your trying to pull a vacuum on the cruise servo to test it to see if it holds vacuum?If so get a hand vacuum pump they work great for testing all the vacuum diaphrams. Plus they have a gauge to tell you if its leaking. Pull about 20 inch pounds a of vacuum on it. Then see if the gauge drops they sell the hand pumps everywhere auto zone sears harbor frieght auto parts stores.I reccomnend the mighty vac brand one I got one they are good quality. If you can wait a few days amazon has them also.
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Monday, April 9th, 2012 AT 10:30 PM
Tiny
SEAN03
  • MEMBER
  • 523 POSTS
I tried to pull the vacuum on the cruise control servo and it wouldn't pull it into a vacuum. Would this cause the light on the inside not to come on and the cruise control not to work. Thanks.
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Saturday, April 14th, 2012 AT 11:42 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
It should hold vacuum or it wont hold the pedal as far as light etc let me lok up your cruise system. Have you checked the fuse yet.
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Sunday, April 15th, 2012 AT 4:51 PM
Tiny
SEAN03
  • MEMBER
  • 523 POSTS
Yes I have changed fuses and I have changed the cruise control lever. I also changed the switch. None of it worked. Is there a way to check the connector that hooks up to the cruise control servo. Also my brakes don't work either. I have to push the pedal to the floor before it stops. I havr changed the brake booster and I have changed the master cylinder. Tomorrow I'm going to try to bleed them.
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Sunday, April 15th, 2012 AT 7:24 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
Did you bleed the master before putting the new one on?Also you bleed the brakes after replacing the master correct?Do you have rear disc or drums brakes?
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Sunday, April 15th, 2012 AT 8:56 PM
Tiny
SEAN03
  • MEMBER
  • 523 POSTS
Yeah I bleed the master cylinder before I put it on. When I got it all hooked up I bleed it again. I didn't bleed the breaks I might do it tomorrow. The bleeder screws are rusted. I have drum breaks in the rear.
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Sunday, April 15th, 2012 AT 10:54 PM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
When you replace a master you habe to bleed it before you put it on then bleed the breaks with the new master on. Also make sure you clean and adjust your rear brake shoes.
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Monday, April 16th, 2012 AT 4:56 AM

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