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

Vacuum Line

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Old Aug 23, 2006 | 06:20 PM
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Default Vacuum Line

Where does the vacuum line that dissappears behind the distributor towards the firewall area go?
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Old Aug 23, 2006 | 07:22 PM
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One goes into the wiring harness and thru the FW to supply vac to the HVAC system.
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Old Aug 23, 2006 | 08:46 PM
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Originally Posted by 89 Paul in Cal
One goes into the wiring harness and thru the FW to supply vac to the HVAC system.
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Old Aug 23, 2006 | 09:04 PM
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What year car?
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Old Aug 24, 2006 | 10:47 PM
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Default Year

It's a 1991. It looked like the vacuum line dissappeared into the wiring bundle at the firewall when I looked at it.
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Old Aug 26, 2006 | 12:02 AM
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Originally Posted by Coconut
It's a 1991. It looked like the vacuum line dissappeared into the wiring bundle at the firewall when I looked at it.
I started at the top of the this thread also, I went to your profile and it list nothing. To make it easy for the people helping you, you need to add you model year at the least. Yes, now I know it's a 91, but at the top of this thread I didn't....
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Old Aug 28, 2006 | 10:08 AM
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Default Answer

I found out something. When the key is in the ACC position with the A/C unit on, it blows air through the top of the cowl vent. When I crank the car, the vacuum starts, & the air sucks in after the vacuum activates the A/C doors.
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