I took a look at the A/C vacuum system on ALLDATADIY. Yikes! Where do I start? I am leaning toward the vacuum source rather than any individual system within the system. All work fine until I accelerate moderately. Then the air just goes away until I let up on the throttle. Then everything is back to normal.

Where does the system pick up it's vacuum off the engine?

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Coast Aero Support Services, LLC
'92 MB 500 SL
'01 BMW 525i Sport
'98 Harley Davidson RoadKing
'74 BMW 3.0 CSi - Gone to a good home