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01-17-2021
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#1 |
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Join Date: Jan 2021
Location: New york
Posts: 1
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Zr1 fuel pump 1 not working
I have a 1990 zr1 that sat for a few years. I changed injectors and fuel pumps. The car starts and gets up to a certain temperature and loses fuel pressure and stalls. When I start the car cold and I pull the fuse from the block under the passenger side dash it loses fuel pressure and stalls. I do not think this should happen because the fuel pump one should keep pressure and keep it running. I connected the Lead coming out of the firewall to the positive on the battery and still no change car still stalled when it got warm.
Any Ideas? Mike |
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01-17-2021
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#2 |
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Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,843
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Re: Zr1 fuel pump 1 not working
Pull the FP2 fuse and see if it starts in the same manner. If it doesn't start you have a bad FP1 pump. The other possibility to check are the hose clamps on the pump assembly or a cracked Y block on the pump assembly. I'm betting it's a bad FP1 pump.
H 
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01-17-2021
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#3 | |
 
Join Date: Jan 2006
Location: Decatur, AL
Posts: 1,129
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Re: Zr1 fuel pump 1 not working
Quote:
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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 |
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01-24-2021
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#4 |
 Join Date: Jan 2004
Location: Alex VA
Posts: 1,080
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Re: Zr1 fuel pump 1 not working
if anyone needs pumps, I gotz em cheap. I upgraded on the LSV and my fresh stockers are no longer needed.
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01-25-2021
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#5 |
Join Date: Sep 2016
Location: Ocala, FL
Posts: 896
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Re: Zr1 fuel pump 1 not working
Mike,
We can help but we need to know the fuel rail pressures. Get a gauge set from harbor freight. Read the stickies on fuel pumps here on the forum. I think you have a cracked hose or fitting in the tank. We need more info sir.
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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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01-26-2021
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#6 |
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Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Re: Zr1 fuel pump 1 not working
As others have said, very likely pump 1. The LT-5 runs on both pumps until temp comes up and engine switches to closed loop, then it turns off #2 and only runs on #1 unless demanded at WOT by ECM. Make sure you check the bulkhead connector as well (for corrosion) when you have the assembly out.
Sent from my SM-G950U using ZR-1 Net Registry mobile app Last edited by jss06c6; 01-26-2021 at 07:16 AM. |
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Linear Mode
