Question about 1993 Mercury Grand Marquis
Why does car only go into gear when i press on brake pedal
This is normal It is a safety feature forced upon the automotive industry by lawyers.
Posted on Apr 23, 2014
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Posted on Jan 02, 2017
SOURCE: brake pedal has alot of
The air seeping is a dead giveaway. Your power brakes are now manual brakes, but stiffer. The diaphram in the brake booster has torn and the hissing noise is the engine vacuum escaping (you hear it louder when you depress the pedal right?). Replace the booster and you will be fine. The brake lights probably don't work because you can't push the pedal down far enought to release the switch. Please rate. Thanks.
Posted on Sep 03, 2011
Testimonial: "I am grateful for your help.I was told so by a mechanic that it was brake booster diaphram or abs pump.pedal has so much pressure and hissing."
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