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Old 07-08-2011, 09:05 PM   #1
nightshifter999
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vacuum leak

My car has a vacuum leak just behind the throttlebody and firewall. There are 3 hoses back there. Can anyone tell me what part # these are. I know one is kind of C shaped and regular hose will crimp and cut off airflow. Please help asap. Car is running real bad.


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Old 07-09-2011, 01:53 AM   #2
BC_ZX3
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Actually there are more than three possible sources of leaks back there. Using the pic below as a reference:

The very bottom one pointing to the left with the red tip is the take off for the brake booster; the one just above that pointing straight out is the PCV hose fitting; the three above that grouped together are vacuum takeoffs for the 1) the EGR valve actuator 2) the fuel pressure sensor and 3) the EVAP purge valve actuator; the larger diameter one uppermost is for the EVAP purge inlet.

Which one is leaking?
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Old 07-09-2011, 12:40 PM   #3
SVTF410
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I had an escort with same motor that had a major vacuum leak, it was under the manifold where a large hose connect, i couldn't see it fromt the top i just had to feel under the manifold by the throttle body
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