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1992 C4 A/C comes out at floor on acceleration


LilRedVette1

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LilRedVette1

I changed the vacuum check valve on the passenger side of the engine, next to the fuel rail, no change. In a possible related item, my cruise control isn't working?

Anything I could check without taking it into a repair shop?

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You have a problem with your vacuum reservoir.  Either it is cracked and not holding vacuum, or the vacuum it is storing is being bled off through a leak elsewhere.

Take a close look at all of those lines and the vacuum reservoir itself.

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  • 1 month later...

The cruise control wont set if the brake light switch is not centered on the brake pedal arm. If you were down there messing around with the pedal areas. Also check the vaccum hose next to the battery that plugs into the CC servo. As to the AC problem that could be an AC programmer issue and you may need to replace the AC programmer which is located in the interior above the gas pedal. It is a bear to get to. This is assuming you have the C68 AC head unit option which is all electronic controls vs the manual controls. GC

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