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02-29-2020
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#1 |
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Join Date: Feb 2020
Location: Covington, LA
Posts: 9
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Vacuum Pump Hose Routing/Troubleshooting
I recently found what I think to be an amazing deal on a 1992 ZR-1 that seems to have been sitting for quite some time. I’ve been able to figure out and fix most of the issues I’ve come across so far, but one thing that is stumping me at the moment is the vacuum pump underneath the passenger headlight.
It appears to be missing at least one hose and has a golf tee shoved into another, which could possibly be correct, but I don’t think it should run continuously. The pump continues to run even when I disconnect and cover the main vacuum line that runs under the plenum. I do not have a high idle. Could anyone give a picture or diagram of their pump with the proper hose routing? If that doesn’t help, am I correct in assuming the next step would be to go towards the secondary check valve or is there another possibility? I had to pull the plenum already to replace injectors and I did my best to make sure I didn’t have any vacuum leaks underneath. Thanks for the help, Everett |
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02-29-2020
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#2 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Vacuum Pump Hose Routing/Troubleshooting
The pump itself and it’s hoses look like this. Hook up the hoses properly including the one that runs under the plenum. If there is no leak in the secondary system and the check valve is sound the pump should stop periodically.
H  
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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03-03-2020
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#3 |
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Join Date: Feb 2020
Location: Covington, LA
Posts: 9
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Re: Vacuum Pump Hose Routing/Troubleshooting
Thanks Ccmano. I had added the line that loops around from the white nipple at the bottom, but ultimately my problem was that someone had hooked up the main vacuum line that runs under the plenum to that white nipple and not the black one next to it. After swapping over everything works as it should.
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03-04-2020
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#4 | |
 
Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
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Re: Vacuum Pump Hose Routing/Troubleshooting
Quote:
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[B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B] |
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03-04-2020
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#5 | |
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Join Date: Feb 2020
Location: Covington, LA
Posts: 9
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Re: Vacuum Pump Hose Routing/Troubleshooting
Quote:
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03-04-2020
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#6 | |
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Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
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Re: Vacuum Pump Hose Routing/Troubleshooting
Quote:
__________________
[B]1990 #2815[/B] [COLOR="Red"][B]Red/Red[/B][/COLOR] Ported Plenum & IH (by Pete) Haibeck Chip Rebuilt FPR (by Phil) FIC Injectors Watson LT Headers 3" Stainless Works exhaust Lingenfelter Open Air Lid Bill B Built Transmission Shifter & C Beam Plates [FONT=Impact][COLOR=red]1992 [COLOR=black]#[/COLOR] 091[/COLOR][/FONT] [FONT=Impact][COLOR=#ff0000]Red/[COLOR=silver]Gray[/COLOR][/COLOR][/FONT] [B]SOLD[/B] |
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Linear Mode
