Question about 1997 Ford Econoline
When the air cuts out, I can hear the directional door changing positions. The mechanic added an extra vacuum canister on it, but problem still remains.
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Posted on Jan 02, 2017
SOURCE: Vent control
You have a vacuum leak.Defrost is the default postion(no vacuum).
See if you can locate the small black vacuum line that goes inside the vehicle on the passenger side near the heater core. The trace it back,should see it going to a canister then to the intake manifold.Make sure it is not disconnected or broken somewhere.
Posted on Mar 02, 2009
SOURCE: ac vent problem
the vacuum canister is located under the battery tray on this model truck, however the most common problem are the vacuum lines that run around the battery box. usually the battry will leak acid at some point in time and create holes in the small hard plastic lines. i would remove the battery and check the vacuum lines first.
Posted on Aug 18, 2008
it's getting to much egr the egr has gone bad and needs replaced.
the diaphragm in the egr is leaking, and default position for air is defrost.so when you hit 3000 rpm you don't have enough vacuum.
Posted on Apr 30, 2009
usually the check valve is in the engine compartment. look on the pass side at the heater box and see if the vac lines have a check valve in it it should be a grey or black line
Posted on Jul 11, 2009
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