2003 Ford Crown Victoria UNDER ACCELERATION VENTS CHANGE

2003 FORD CROWN VICTORIA
82,500 MILES • V8 • 2WD • AUTOMATIC
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EANDA_NEWS
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  • 1 POST
Hello, I have a crown vic vin (P74) with the automatic climate control. when i am under acceleration and going up hill the air flow goes from floor or vent all the way to the Windshield defrost vents. As I let off the gas the airflow returns to the set outlet. I am smart enough to know that this system relys on vacuum to work but I cant figure out where to start. some one at ford said to look for a 1 way valve that resembles a flying saucer but i can not seem to locate it.
Mar 10, 2010 at 11:41 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,194 POSTS
  • ASE Certified Mechanic
Have you checked everything under the dash? With the engine running, you may hear a hissing sound where it is leaking. As far as the one way valve, that won't cause this problem.
May 3, 2010 at 11:29 AM
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