Question about Cars & Trucks
Not a car guy I guess
You need to do some brake work,
at least once a year or more often
Could have said neglect or sloppy work
at some shop in the past
Posted on Dec 05, 2014
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Posted on Jan 02, 2017
From your description this appears to be a Brake servo issue.
The brakes are assisted by a vacuum created from the draw off the inlet manifold, it gives assistance too the brake pedal pressure by a large tank/cylinder mounted on the Bulkhead/firewall.
I feel that the sound you a hearing is air being draw into the Brake Servo from the foot pedal seal and the reason for fluctuation in the engine is the vacuum from the inlet manifold is being upset.
Attention I suspect should be addressed to the Brake servo/pedal seal or gaitor.
I hope this clarifies your thoughts?
Please remember to rate my effort.
Posted on Jan 22, 2009
Check brake fluid level. Check rear brake shoes and wheel cylinders for wear or leakage. If all is good ,the master cylinder may have an internal leak.
Posted on Jul 14, 2009
yes it sounds like the problem it could maybe be the brake booster if the brakes are better at a higher idle but there is a check valve on the brake booster that cost 2.00 too replace that runs off vacume i would replace first
Posted on Jul 22, 2009
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