Having problems with your 1993 Ford Econoline ?

1997 Ford E150 5.4 L vacuum line drawing for heater/air conditioning. Cool air cuts out going up hill.

Posted / edited by AnonymousUser on : 23-05-2022

Answers :

You have a nylon vacuum line running from the engine intake manifold with a vacuum reservoir tied ino it, that runs through the firewall, usually by the passenger side, and runs to the heater controls. If there is a leak, the system fails to defrost as required by law.
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\015\012WHen you are going up a hill, you use up the vacuum and revert to the vacuum storage canister to get you over the hill, when vacuum is restored.
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\015\012So, find the leak. The vacuum stoagre canister line has a one way check valve to prevent loss of vacuum on shut down.
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\015\012It might be easier to remove the passenger fender for access.
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\015\012Also, remove the dog house and you can run a new line from the engine to the canister under the dog house seal.
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\015\012vac reservoir, pass side
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Repair Help & Product Troubleshooting for 1993 Ford Econoline

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