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Date:         Sun, 31 Dec 2006 11:55:53 -0500
Reply-To:     Geza Polony <gezapolony@SBCGLOBAL.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Geza Polony <gezapolony@SBCGLOBAL.NET>
Subject:      Re: Manifold vacuum specs?

Thanks Max.

Here's what happened when I started checking. First place I tried was the fuel pump regulator vacuum hose. Got the guage on, started car, lo and behold--zero pressure. WT heck? Shut off car, replugged FPR, plugged guage into distributor hose: 13 in., slight wavering, looked good. It turned out the FPR vacuum hose at the manifold was completely severed by the hose clamp I had on there, but couldn't be seen because of its position way inside there and because of the hose clamp itself.

No wonder there was surging idle sometimes!

A new check showed vacuum at 15-19, depending on where I had the throttle bypass screw. Steady, not fluctuating.

I reset the idle speed with AIC bypassed, reconnected, runs like a champ.

I don't have any of those vacuum restrictors the Bentley shows. Are they necessary?


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