KPoole9008
New Member
I have power brakes. When I press down on the brake pedal my engine rpms go up 300 rpms. I'm thinking my booster has a diaphram leak. Is my assumption correct?
Power brakes
- Thread starter KPoole9008
- Start date
Ted Brown
Member
Sounds like a reasonable assumption to me... Drive safe
Corley
New Member
Maybe, maybe not. Could also be the valving. A bit of dirt can cause the valve to stick, and leak. Since these are usually mounted on the firewall, and usually draw air from around the shaft that the pedal pushes, and usually have a foam filter for the incoming air, they are getting fairlly clean air from inside the car. If yours is under the floor, be sure the filter is in place since that air is a bit dirtier down there, and a spec of junk could get into the valve causing your problem.
(However, if the idle goes up 300 then settles back down while you hold the pedal down, that's probably normal, depending upon the vacuum plumbing.)
JMHO,
Corley
(However, if the idle goes up 300 then settles back down while you hold the pedal down, that's probably normal, depending upon the vacuum plumbing.)
JMHO,
Corley
KPoole9008
New Member
Yes. The engine stays idled up until I take my foot off the brake pedal.
Ted Brown
Member
I would have to say there is a vacuum leak somewhere...
KPoole9008
New Member
I replaced the booster & problem solved. Thanks guys!
