Vacuum lines diagram
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Tuned
Joined: Jan 2010
Posts: 285
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From: Suwanee, GA.
Thanks that helps. But what is the MAP? I don't have one located above the heater box like you do? See first picture, I do have a vacuum hose over there, Not sure what it's for?
Also where does this yellow vacuum hose (see bottom picture) go?
Fleet Owner
Joined: Oct 2005
Posts: 20,786
Likes: 1,751
From: Kentucky
If there is no MAP sensor above the evaporator that means you have a Mass Airflow (MAF) truck that does not use a MAP sensor. Pretty rare to have a 1994 5.8L MAF truck.
The yellow vacuum line is for the Fuel Pressure Regulator, it goes to the vacuum tree on the upper intake manifold.
The yellow vacuum line is for the Fuel Pressure Regulator, it goes to the vacuum tree on the upper intake manifold.
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powerstroke7367
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
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Aug 12, 2019 02:40 PM
