Verification of this vacuum line (pic inside) (1990) - ZR-1 Net Registry Forums

Corvette95 · 12-28-2020

Double checking, the top vacuum line mounted to the power steering pump went to the now deleted exhaust air pump..correct? I can cap this top line (it has vacuum line attached now in this photo - was going to remove and cap) also replacing the unneeded "T" on the drivers wheel well with a straight connector since the addition of the headers and removing the AIR valve.

Young1 · 12-30-2020

I went out to look ar my 91. It only has one vacuum line at that location. Someone with 90 needs to respond please. Hey Joel in Tampa that has an NCRS 90 help out a brother.

Pete · 12-31-2020

Might be needed for cruise control.

Pete

Corvette95 · 01-03-2021

Humm, I need to break out the FSM, I thought this would be an easy question. I thought I unplugged it as part of the header install

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secondchance · 01-03-2021

My 94, this vacuum line continues to a ?T? fitting and I think one line goes to vacuum tank and the other to cruise control - I think.

Corvette95 · 01-03-2021

Quote:

Originally Posted by secondchance

My 94, this vacuum line continues to a ?T? fitting and I think one line goes to vacuum tank and the other to cruise control - I think.

Thanks, still working on transmission and exhaust and haven?t really researched it much yet.I know there was a T on the a.I.r pump that I removed but that I just needed to install a straight vacuum adapter. I?m sure it will be evident when I investigate and look at FSM. Again, just thought it would be an easy answer. Thanks

-=Jeff=- · 01-03-2021

I will try to check my 1990, but as I recall, I think I am still using that line fto the front of the car. I think that is for the Purge solenoid for the Charcoal canister..

Corvette95 · 01-06-2021

Well, its parts of the cruise, I believe it ran from the A.I.R module to the power steering line clip as shown and then to another adapter that went to the A.I.R module. Thats how I have it hooked up now, probably needs a longer piece of hose.

12-30-2020	#2
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 898	Re: Verification of this vacuum line (pic inside) (1990) I went out to look ar my 91. It only has one vacuum line at that location. Someone with 90 needs to respond please. Hey Joel in Tampa that has an NCRS 90 help out a brother. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

12-31-2020	#3
Pete Join Date: Dec 2003 Location: Chicagoland,IL Posts: 2,679	Re: Verification of this vacuum line (pic inside) (1990) Might be needed for cruise control. Pete __________________ '91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage

01-03-2021	#4
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,119	Re: Verification of this vacuum line (pic inside) (1990) Humm, I need to break out the FSM, I thought this would be an easy question. I thought I unplugged it as part of the header install Sent from my iPhone using ZR-1 Net Registry __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454

01-03-2021	#5
secondchance Join Date: Aug 2006 Location: McLean, VA Posts: 3,723	Re: Verification of this vacuum line (pic inside) (1990) My 94, this vacuum line continues to a ?T? fitting and I think one line goes to vacuum tank and the other to cruise control - I think.

01-03-2021	#7
-=Jeff=- Join Date: Jul 2007 Location: Bartlett, IL Posts: 7,169	Re: Verification of this vacuum line (pic inside) (1990) I will try to check my 1990, but as I recall, I think I am still using that line fto the front of the car. I think that is for the Purge solenoid for the Charcoal canister.. __________________ 1990 Corvette ZR-1 #1051 Watson Headers (2" Primary) - Flowmaster Cats - Borla Catback Late Model IH - Plenum Coilovers - 4.10s Custom Interior NCM Lifetime Member #978

01-06-2021	#8
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,119	Re: Verification of this vacuum line (pic inside) (1990) Well, its parts of the cruise, I believe it ran from the A.I.R module to the power steering line clip as shown and then to another adapter that went to the A.I.R module. Thats how I have it hooked up now, probably needs a longer piece of hose. __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454