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12-31-2013
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#1 |
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Join Date: Dec 2013
Location: Wisconsin
Posts: 15
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Vacuum leak on 91 ZR1
Hello all! I've been browsing this forum as I just got my first Corvette - a 91 ZR1 with 66k miles on it. I ran through the forum's inspection list and found a secondary port vacuum leak - runs and doesn't stop when key is in the ignition prior to starting.
Upon inspecting the secondary port vacuum I noticed that it was dangling (see photo) by the far right hand bolt (which was also loose). I also noticed that the main line coming off it it has disconnected just before the line that runs under the plenum. It looks like someone attempted to crimp it in the past and failed. Is it safe to re-fasten the secondary vacuum pump and replace the one connection and/or line to see if that fixes it? Thanks for any tips and Happy New Year! |
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12-31-2013
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#2 |
 
Join Date: Dec 2003
Location: Arcadia, OK
Posts: 3,399
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Re: Vacuum leak on 91 ZR1
Picture did not post. If you are referring to a 1/8" black plastic hard line running from the pump to near the top alternator bracket..... there is a rubber hose that connects to a black plastic line that goes under the plenum. Sounds like yours may have disconnected or the line has broken. Both are common, re-connect the line.
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Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. |
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12-31-2013
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#3 |
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Join Date: Apr 2004
Location: Atlanta, GA
Posts: 2,170
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Re: Vacuum leak on 91 ZR1
Welcome and congrats on the ZR-1. You can get a hand held vacuum pump to help find where it may be leaking, Also do a search many posts on vacuum issues.
http://www.zr1.net/forum/showthread....t=vacuum+leaks
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Steve 1990 Steel Blue/Black #2355 1990 Red/Red #1473 1991 Quasar /Black #118 Sold 1991 Turquoise/Black #766 Parted Out 1993 Yellow/White #179 Sold 1990 Black/Gray #1361 Headers/4:10s Sold Last edited by We Gone; 12-31-2013 at 12:23 PM. |
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12-31-2013
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#4 |
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Join Date: Dec 2013
Location: Wisconsin
Posts: 15
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Re: Vacuum leak on 91 ZR1
Whoops. Here are photos! Thanks for the tips! As soon as I'm back to the heated storage I'll try re connecting it.
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12-31-2013
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#5 |
Join Date: Feb 2006
Location: San Antonio area
Posts: 1,178
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Re: Vacuum leak on 91 ZR1
kablamo - are you any kin to David Hobbs? Enquiring minds, you know. Welcome aboard - that's a good looking 91 - but pretty easy to lose in a snowbank ...
Cheers from a recovering Cheesehead.
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“Buy the best example of what you want, and pay whatever it takes. That way, you cry only once.” ~ Bruce Meyer Last edited by gbrtng; 12-31-2013 at 04:50 PM. |
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12-31-2013
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#6 |
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Join Date: Dec 2012
Location: NC
Posts: 1,783
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Re: Vacuum leak on 91 ZR1
Welcome onto the boards there.
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01-01-2014
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#7 | |
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Join Date: Dec 2013
Location: Wisconsin
Posts: 15
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Re: Vacuum leak on 91 ZR1
Quote:
I am not related to David Hobbs but us WI folks do stick together. Good luck on your recovery, our culture runs pretty deep ! Thank you all fort he warm welcome! I will try and re connect it once I'm back to heated storage. |
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