1993 lumina

1993 ALL OTHER MAKES ALL OTHER MODELS
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GRIMMY523
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  • 3 POSTS
While the brakeis depressed at idle speeds the car wants to stop and sometimes does also sometimes when you accelerate after a stop it boggs down. I have replaced the plugs and wires. The rpm gauge also fluctuates when at idle with the brake depressed.
Apr 16, 2006 at 6:37 PM
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LOSONE
  • ✓ASE Certified Mechanic
  • 1,616 POSTS
  • ASE Certified Mechanic
Simple, you have a bad brake booster that is leaking vacuum when you depress the pedal causing all sorts of wierd problems. Good Luck
Apr 16, 2006 at 6:41 PM
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GRIMMY523
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  • 3 POSTS
How can it be a bad brake booster when the rpm fluctuates even when i n park.
Apr 17, 2006 at 5:09 PM
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LOSONE
  • ✓ASE Certified Mechanic
  • 1,616 POSTS
  • ASE Certified Mechanic
A vacuum leak is a vacuum leak regardless. It is greater when you depress the brakes. In the past 40 odd years of garage ownership I have replaced hundreds of brake boosters. Good luck
Apr 17, 2006 at 5:36 PM
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