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Acceleration up and down whwn applies brake

Tiny
SALBERTS
  • MEMBER
  • 1992 TOYOTA PICKUP
  • 100,000 MILES
When apply brakes acceleration goes fast and slow. When let up on brake accels high. Chked booster vacuum. The acceleration changes when applieing brakes.
when applying brakes thw idle lopes up and down. When I let up on brakes idles normal
Friday, July 5th, 2013 AT 6:29 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,724 POSTS
You must have a vacuum leak somewhere. Check to see if there is one on the intake as well as the hose going to the booster. If you can't find anything, check manifold vacuum to make sure it is within the manufacturer's specs.
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Friday, July 5th, 2013 AT 7:09 PM

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