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#1 |
![]() Join Date: Jul 2018
Location: New Jersey
Posts: 10
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I am not getting enough fuel pressure for the car to drive. It will idle, but any throttle results in the engine breaking up. In checking the various possibilities, I found that I have no power to the fuse for the second fuel pump. Does any one know a source for a complete wiring diagram for the relays, the fuses and fuse blocks and the pumps?
Thank you, |
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#2 |
![]() Join Date: Apr 2007
Location: Northern VA
Posts: 2,654
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Book 2 of the Factory Service Manual set has the diagram you at looking for. If you don't have them for your particular year look on eBay.
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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#3 |
![]() Join Date: Apr 2007
Location: Northern VA
Posts: 2,654
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Second fuel only come on during startup and when the ECM calls for it during hard acceleration. Otherwise the main fuel pump supplies all the fuel engine requires.
How much fuel pressure do you have? Sent from my iPhone using ZR-1 Net Registry
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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#4 |
![]() Join Date: Jul 2018
Location: New Jersey
Posts: 10
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Phil
Thanks for the help. Found the wiring diagram and traced the problem to the fuel pumps. Do you know any source for the internal hoses and the fuel block? Mine are not bad but would like to replace them while everything is apart. Again, thanks for the help |
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#5 |
![]() Join Date: Feb 2010
Location: Ochlocknee, GA
Posts: 434
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Check with local auto parts stores. Gates hose 5/16 x 1 ft. # 27093. And
Gates hose 3/8 x 1 ft # 27037. Also check with Carter for a billet fuel block. John 1990 White/ Black # 2546 one of a few 4l8OE eq ZR-1's Last edited by aafc; 04-01-2024 at 11:50 AM. |
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#6 |
![]() Join Date: Sep 2008
Location: Speedway, IN
Posts: 126
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Be sure you get high pressure, submersible fuel line. The wrong stuff will melt in your tank. Might soak a piece in a jar to be sure.
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#7 |
![]() Join Date: Feb 2010
Location: Ochlocknee, GA
Posts: 434
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Sorry,
If you check with Gates it shows submersible fuel line. I should have said that on my last post. John |
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#8 |
![]() Join Date: Sep 2016
Location: Ocala, FL
Posts: 889
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And one ft of hose can set you back 30 bucks. It is available on Amazon. Get high pressure clamps too. Not the low pressure screw on the side type.
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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. |
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