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AC problem S90-V90 1998

posted by  B.C. on  Thu Jul 28 06:24 CST 2005
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last visit: Wed Mar 28 22:28 CST 2012
[RELATED]

Jbowers is spot on. Here's why: Manifold vacuum is highest at minimum throttle, and lowest when accelerating hard.

The system should have a vacuum check valve, and a vacuum reservoir, so that a drop in manifold vacuum won't affect the air-directing motors. But, as jb sez, if the reservoir and downstream hoses leak, vacuum is lost.

What's the fix? Get that layout from jb, and look for leaks.

Good Luck,

Bob

:>)






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New AC problem [S90-V90][1998]
posted by  Rebe  on Thu Jul 28 03:52 CST 2005 >


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