hissing sound when start and stop engine 86 ford ranger 2.9 liter

Asked by jzedaker Sep 16, 2015 at 06:40 PM about the 1986 Ford Ranger S Standard Cab SB

Question type: Maintenance & Repair

still have a hissing sound coming from somewhere else not near
the brake vacuum booster line and still hisses when i disconnect
line, held my thumb over it while starting and stoping engine.....
still hissing when start and stop engine, sounds like
breathing/sucking air through a tracheotomy tube if you have
ever heard that sound........ can anyone help ?

2 Answers
64,510

firebird338 answered 8 years ago

Take a can of carburetor cleaner and spray is throttle body cleaner and spray around the area you think the leak is coming from if engine idle rises the leak is in that area that should put you close enough to pin point where the leak is coming from.

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