92 Vacuum lines Q
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Joined: Dec 2000
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From: RDU NC
92 Vacuum lines Q
Where do the vacuum lines (92 6spd) lead to from the check valve on the passenger side of the intake? I'm not sure mine are hooked up properly, and the vacuum diagram on the radiator doesn't really help me. If there are diagrams in the FSM, what page?
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Joined: Feb 2012
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From: Brandon MS
On my 93 one of the lines goes into the big wire loom and comes out between the battery and the engine into a t fitting that goes to the ball in the drivers front end and the other goes to cruise control. The other line goes into the cabin on the passenger side and comes out of the main loom and goes across the dash to the AC programmer box (above the accelerator pedal high up on the firewall). If you remove the passenger knee bolster panel you will find it.
Thread Starter
Pro
Joined: Dec 2000
Posts: 555
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From: RDU NC
So here's where they go now, can someone please verify these are correct?
From the pass side of intake:
- Top goes to the FPR
- Bottom goes to the check valve:
-One of the lines from the check valve goes into the wire bundle
-Other goes all the way to the driver side near the battery then T's:
-one of the T's go to the top of the cruise control gimmick
-The other side of the T goes into a wire bundle
- The bottom vac line of the cruise control thing goes through the firewall onto a switch that appears to be on the brake pedal. This line is dry rotted and needs to be replaced.
Does all this stuff sound right? My main reason for chasing the vac lines is because the C68 only blows out the top. A/C doesn't engage the clutch, but I don't know if it's related, and I'm almost positive the freon is low.
From the pass side of intake:
- Top goes to the FPR
- Bottom goes to the check valve:
-One of the lines from the check valve goes into the wire bundle
-Other goes all the way to the driver side near the battery then T's:
-one of the T's go to the top of the cruise control gimmick
-The other side of the T goes into a wire bundle
- The bottom vac line of the cruise control thing goes through the firewall onto a switch that appears to be on the brake pedal. This line is dry rotted and needs to be replaced.
Does all this stuff sound right? My main reason for chasing the vac lines is because the C68 only blows out the top. A/C doesn't engage the clutch, but I don't know if it's related, and I'm almost positive the freon is low.
Instructor
Joined: Feb 2012
Posts: 145
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From: Brandon MS
Sounds right. I had to replace the line from cruise control through firewall also, it goes to the brake switch that disengages the cruise control when you step on the brake. If you are only getting air out of the defrost vent then there is probably a problem with the AC programmer because when this fails the default mode is for only the defrost opening to work. Do a search on AC programmer and you can find out more about the problem. It could be the vacuum hose harness that attaches to the programmer or the programmer itself. The programmer is a real pia to get to.
