A/C/Vents NOT working...
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More Turbo
Joined: Jan 2014
Posts: 531
Likes: 1
Sorry Sean, I'm not seeing your sig in the first posts of this thread.
CB, I would Rep you too, but I must like your posts too much!
There should be a vacuum motor at the recirc door on top of the heater plenum near the PS hood hinge.
But there must be a vacuum line going to either the reservoir or the distribution block (as is my case)
These plastic lines become very brittle and you might have broken it off without knowing Sean.
CB, I would Rep you too, but I must like your posts too much!
There should be a vacuum motor at the recirc door on top of the heater plenum near the PS hood hinge.
But there must be a vacuum line going to either the reservoir or the distribution block (as is my case)
These plastic lines become very brittle and you might have broken it off without knowing Sean.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
"all of that" = vacuum lines?
You can't eliminate the brake booster, distributor advance or climate controls...
(and EGR if you kept it)
Other vacuum lines control EEC, so there is that too (if you kept it)
You can't eliminate the brake booster, distributor advance or climate controls...
(and EGR if you kept it)
Other vacuum lines control EEC, so there is that too (if you kept it)
Posting Guru
Joined: Apr 2011
Posts: 1,636
Likes: 5
From: Orlando area
here is a photo. The factory lines are small hard plastic lines (which get brittle over time). On my truck I had to replace these lines with rubber. Note how the two lines come out next to each other (at the top of the HVAC housing just under the hood hinge). The hose with the white dots feeds that vacuum control motor in the photo. the other line is manifold vacuum going to that check valve. From the check valve one line goes to my vacuum reservoir (ball shaped) tank and the other side goes to the intake manifold.
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More Turbo
Joined: Jan 2014
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Likes: 1
Right...I meant the plastic vac lines. And I of course added the new DS II Distributor and vac advance line. Apparently I disconnected the climate control stuff though.
pedant
Joined: Jan 2008
Posts: 23,576
Likes: 39
From: EXTREME southwest CT
My truck is a rats nest of those brittle plastic vacuum lines.
At least the colored ends are pretty easy to match up when you have to replace it all with rubber.
Not sure what vacuum controls you would have with EEC-IV that you would need to eliminate for a DSII conversion.
My truck was DSII from the factory.
At least the colored ends are pretty easy to match up when you have to replace it all with rubber.
Not sure what vacuum controls you would have with EEC-IV that you would need to eliminate for a DSII conversion.
My truck was DSII from the factory.
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
My non A/C 80 has it. Doesn't have anything hooked to it, though.
The truck does have dealer installed A/C, but it does not use any vacuum for the HVAC systems (yes, dual). The heat and A/C are completely separate units, sharing only the blower switch, which controls 2 different blowers.
The truck does have dealer installed A/C, but it does not use any vacuum for the HVAC systems (yes, dual). The heat and A/C are completely separate units, sharing only the blower switch, which controls 2 different blowers.
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Thread Starter
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More Turbo
Joined: Jan 2014
Posts: 531
Likes: 1
My truck is a rats nest of those brittle plastic vacuum lines.
At least the colored ends are pretty easy to match up when you have to replace it all with rubber.
Not sure what vacuum controls you would have with EEC-IV that you would need to eliminate for a DSII conversion.
My truck was DSII from the factory.
At least the colored ends are pretty easy to match up when you have to replace it all with rubber.
Not sure what vacuum controls you would have with EEC-IV that you would need to eliminate for a DSII conversion.
My truck was DSII from the factory.
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