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

Cruise module vacuum routing

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Old Oct 23, 2014 | 10:50 PM
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Hairy W Bush's Avatar
Hairy W Bush
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Default Cruise module vacuum routing

I have 1 hose connected and the other disconnected...wondering where it's supposed to go because I can't find info on this anywhere. It's the one on the bottom. I attached a pic just in case.
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Old Oct 24, 2014 | 01:11 AM
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Two vacuum lines from the cervo ... larger dia. of two ,#6 in the diagrams, goes through the firewall to the brake/clutch switch assem.

smaller dia., #15 in the diagrams, goes to a vacuum T connection. This hose is only about 15'-18' long.

getting the larger dia. line , #6, through the firewall is a PITA... PM me if you need the advice on this hose.
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Old Oct 25, 2014 | 07:52 PM
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Hairy W Bush
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ok something is hooked up to that already so there's something wrong. I believe it is the vacuum hose for the vented optispark. Where is that supposed to go? Here's what it is if you need a picture.

now with this hooked up wrong, I believe that's actually a vacuum leak.

Last edited by Hairy W Bush; Oct 26, 2014 at 08:49 AM.
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Old Dec 31, 2021 | 07:49 PM
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Default cruise control vacuum line (to Brake cutoff)

Mine is rotted and split-broken at the servo. How long is the line? What diameter for replacement tubing? How to mount it thru the firewall? Any advice greatly appreciated!!! Thanks, Rancho
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