Re: air vents cut out under load
"rgarrett" <email@example.com> wrote:
>When accelerating or climbing a hill, the climate control of my '93 960
>changes from the dash vents to the floor vents until the vacuum rebuilds. I
>have searched and searched for a vacuum leak. Both black/white vacuum check
>valves on the firewall have been replaced.
Have you checked the double acting vacuum motor on the driver's side
of the center console behind the cover on the right side of the
driver's foot well? These are notorious for leaking and a pain to
change unless you cut into the heat/cooling plastic box thingy. It's
one of the few _really_ stupid things I have foind on the 960. That
and the design of the PNP switch- but at least you don't have to
disassemble the tranny to get to that.
>The cruise control works
>perfectly so that portion of the system is fine.
The cruise control is powered by a vacuum pump that is electric and
not at all related to engine manifold vacuum.
>The brake booster check
>valves is fine.
That has a one-way valve, so once a vacuum is built up it is (or
should be) held for long periods if the brakes aren't used, and since
you rarely use the brakes (use the vacuum booster) when accelerating
(when vacuum is the lowest) it usually won't show as a symptom.
>The brakes do pulse a little, maybe the vacuum leak, maybe
Probably warped rotors.
Randy & \ \/ /alerie's
'90 245 Estate - '93 965 Estate
"Shelby" & "Kate"