my car is idling high and trys to die and my breaks dont work sometimes

Asked by Guru9YKY9 Jun 12, 2017 at 12:47 AM about the 2006 Ford Fusion S

Question type: Maintenance & Repair

my car is idling high when i start it up. then is starts trying to die. as long as
you give it gas it drives fine. an twice now when i have went to stop my breaks
went to the floor and the car didnt stop. also sometimes when i start the car it
runs like there is nothing wrong with it. please help we cant figure out what the
problem is!!

1 Answer
59,755

enginecreator answered 7 years ago

The brake booster use vacuum created by the motor, this vacuum line has a one way valve (check Valve) this valve may be bad or the booster itself or the the motor may have a huge vacuum leak in one of the vacuum lines or intake gasket or even in the EVAP system, Vacuum lines running from gas take to cannister under hood with a purge valve which may be the bad part too. Your going to have to trace this vacuum leak down.

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