C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Help!!! Vacuum supply

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Old Mar 16, 2010 | 10:30 PM
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Default Help!!! Vacuum supply

Working on by cruise controll. No vac to it. FSM shows supply comes
from a item on the dr side in front of wheel. Where does it get vac from? The FSM doesn't show it. Control clicks when turned on. The pot holds vac. Pulled vac to brake sw and it holds vac till I hit the brake peddle. The vac line coming from item up front is sm. dia. plastic hose.

Thanks again. glassman74
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Old Mar 16, 2010 | 10:49 PM
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Comes from the Vacuum tank on the front of the wheel well, which gets its vacuum from passenger side, right next to the FPR hose.

Check the hose from the CC to the hard vacuum port, it is right under the brake MC.

The LT5 gets it's vacuum from the driver side.

also check the vacuum tank, just follow the hoses till you find the leak.
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Old Mar 16, 2010 | 11:44 PM
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Originally Posted by glassman74
Working on by cruise controll. No vac to it.
What year model?
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Old Mar 17, 2010 | 01:09 AM
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Sorry! It's a 1992 LT1 coupe.
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