86 f150 vacuum problem

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Oct 20, 2004 | 08:23 PM

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86 f150 vacuum problem

help!. i have a 86 f150 with the 5.0 fi. there are two vacuum hoses that come off of the throttle body and they are just hanging there open, i been looking at this thing for hours (yes)! hours, but cannot find where they go. any help at all would be great. thanks.

Oct 20, 2004 | 10:14 PM

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are the hoses on the throtle body, one above and one below the what you ma call it solinoid?? ( the name escapes me at the moment)

Oct 21, 2004 | 02:00 AM

locknkey

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From: Right Next to U

Both od these rubber hoses will go to the throttle Body, it doesn't matter which one goes where..(one on the side top portion, and the other on the bottom portion of the throttle body) Both are connected by a T connection there on top, and it goes all the way over to the middle of the vaccum hose connecter on the top between the air body that connects to the throttle body, it has a bunch of vaccum hoses connected to it also....

Oct 21, 2004 | 11:02 AM

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you will have to bear with me a little bit. I have the motor taken outa my truck right now, and my truck is now under 6 inches of snow.
The distribution block for the vac, sits on to of the intake plenum. From there, there should be a large main vac port, that runs to your brake boster. Then 4 smaller ones. One runs to the cruise (if equiped), one runs to the fire wall, and branches off from there, to operate the various vac systems, like your heater and a/c systems.

Oct 21, 2004 | 11:08 AM

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there should also be a vac line running to an air by-pass valve, behind the motor, to controll the air injection valve. There should also be a vac line running to the egr valve, located next to the throtle body.

Oct 21, 2004 | 12:05 PM

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ok, been haveing a boo see on my truck and my dads, looks like the vac hoses that come off of the throtle body, run down towards the emissions canister.My manual indicates the same. Hope this helps

Oct 21, 2004 | 04:51 PM

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thank you very much for the info. last night i tried hooking those hoses from the throttle body up to the map sensor, and the thing had great throttle response and seemed to run good, but had realy bad fumes that burned my eyes. could this meen something else is wrong. it has a bad hesitation or dead spot the other way. thanks again.