Vacuum line help needed
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New User
Joined: Apr 2004
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Vacuum line help needed
I recently replaced a blown 5.0 engine on a 91 F150 EFI, 5 Sp and I'm having trouble locating on the vacuum hoses. There are six connections on the intake. I have the following 5 hooked up: MAP, FPR, Vacuum Reservoir (Coffee Can), Cruise Control, and Brake Booster. Can someone help me out here? I believe it's a rubber hose connection not one of the hard plastic hoses. I've looked at the vacuum schematics but they seem incorrect for my vehicle. They show connections to the Distributor and the Air Cleaner which my truck does not have.
TIA - mjf
TIA - mjf
Post Fiend
Joined: Nov 2001
Posts: 14,947
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From: Topsfield, MA
That schematic you're looking at must be for an older vehicle with vacuum advance on the distributor.
There's also the thermactor actuators behind the engine that need 2 vacuum lines - and the TAB/TAD solenoids on the coil bracket that need vacuum. There is a 3rd item infront of the coil that needs vacuum but I do not know the name of it.
There is also the EGR valve that needs vacuum - and there is a small intersection next to the heater core (left of upper intake) that has a vacuum line connected to it from the engine. Those feed the blend door and something else I forget.
There's also the thermactor actuators behind the engine that need 2 vacuum lines - and the TAB/TAD solenoids on the coil bracket that need vacuum. There is a 3rd item infront of the coil that needs vacuum but I do not know the name of it.
There is also the EGR valve that needs vacuum - and there is a small intersection next to the heater core (left of upper intake) that has a vacuum line connected to it from the engine. Those feed the blend door and something else I forget.
