Vacuum hose madness! Help!
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Vacuum hose madness! Help!
I'm sure my '89 F-250 isn't the only one with this problem-the heater vents don't change,where does the vac line hook up? And the "gate" under the hood by the firewall,it's hose(real tiny one) is dry rotted and gone.Is there any diagrams that show WHERE to hook these hoses up? (and how?) I sure don't know what I'm doing,and wouldn't want to mess up my emissions stuff(351 gas e.f.i.)...If anyone knows the best way to fix this stuff,I'd be a happy camper...signed,Palletcutter,somewhere in the Northwest Mountains of Arizona...myknlin@hughes.net
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From: Easton,Ks
The only thing the vent system has in common with the emissions system is the vacuum source a the top of the intake manifold vacuum tree.
They DO NOT share the same vacuum tank.
Here is a diagram of the system:
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They DO NOT share the same vacuum tank.
Here is a diagram of the system:
/
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Subford-you are not A Ford man,you are THE Ford MAN!!Again,you're diagrams kick serious butt...so,let me put my brain in gear and try to follow...God Bless the color coded hoses,first.Makes it easier!O-side air vac door is the one under the hood by the right Q-panel,?Door #5 is the one(blue hose)that you can see from the floor leaning in the passenger side,yes?Haven't looked for #7,(floor/def door) yet,but it seems the radio or panel around it needs to come out to reach vac/selector valve.Am I on track so far?I'll get back to you about under the hood stuff.By the way,WHERE do these diagrams come from? Chiltons?...Thanks...I feel much better...as you know,the fuel prob is long fixed(thanks again)and the truck runs great,although the fuel guage bounces when itz above 3/4....palletcutter,staying humble in the Az. mountains
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From: Easton,Ks
I think you are.
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An interesting tidbit(on ac/heater controls)
Hi,Well-interesting to me,but maybe useful to others.If your heater fan/blower switch or rheostat goes out,you might get the blower working only on "high".This is a Ford safety idea.If you live out east,hey,almost everything's out east of arizona...and the weather is bad,Ford designed the switch to bypass the rheostat to high so that a driver would still have defroster capability! That was a wow moment for me cuz I never considered that train of thought.SOOO-if your heater switch works on high,it still may be bad.
Palletcutter in the nw mountains of Arizona
Palletcutter in the nw mountains of Arizona
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From: Easton,Ks
I do not think so.
Position HI just bypasses the resister block to ground.
True you could have bad contacts on the other three positions but very unlikely all three.
If the part that contacts the fan positions is bad then the fan would be inoperative on all speeds.
True without vacuum to any of the vacuum motors the default door positions would be to defrost.
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Position HI just bypasses the resister block to ground.
True you could have bad contacts on the other three positions but very unlikely all three.
If the part that contacts the fan positions is bad then the fan would be inoperative on all speeds.
True without vacuum to any of the vacuum motors the default door positions would be to defrost.
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