2000 Toyota Corolla

Tiny
JOHN BATTISTE
  • MEMBER
  • 2000 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 142,000 MILES
While driving my car, I hear a hissing sound (like air is going through somewhere) coming from the front of the car.
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Saturday, July 11th, 2009 AT 8:31 AM

1 Reply

Tiny
MMPRINCE4000
  • EXPERT
If engine idle changes it is most likely a vacuum leak.

Also look at radiator hoses for leaks.

There are a couple vacuum switching valves, one for EVAP system on throttle body, it will usually click but can hiss.
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Saturday, July 11th, 2009 AT 9:28 AM

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