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Re: 1988 900 cruise control & Vent control Posted by Roger D [Email] ![]() ![]() In Reply to: Re: 1988 900 cruise control & Vent control, Simon S, Sun, 31 Mar 2013 18:34:11 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Look at the white canister that Simon refers to. It should have a vacuum line that goes from a nipple and crosses the engine compartment just below the rubber seal that seals the hood at the top of the firewall. That line obtains vacuum from a white nipple in the manifold just ahead of the brake master cylinder. That vacuum line often splits or cracks at either or both of the nipple connections. That leads to insufficient vacuum to power the inside the dash servos. One test of the vacuum system is to rotate the dash selector knob with the engine on. You should hear a whooshing sound as you move to each vent selection. One of the fun quirks of the car. If the line from the manifold is intact and you still don't hear the whoosh go back to the white canister and follow the other vacuum hose that goes to firewall on the passenger side. That is the line that enters the cabin and supplies vacuum to the dash servos. You'll almost need a mirror to see where it attaches to a nipple on the firewall. Verify that connection is OK
->Posting last edited on Mon, 1 Apr 2013 11:26:08.
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