Question about 1999 Mazda 626
When stepping on the brake the car idles rough, when letting off the brake it smooths out. What could it be ?
Bad check valve in the brake booster where the big vacuum hose connects,Go to Mazda and get one an aftermarket one may not work as well Mazda is pickey when it comes to replacement parts
Posted on Aug 07, 2008
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Posted on Jan 02, 2017
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