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05-14-2020
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#1 |
 Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Fuel issue solved
Just sharing a little info..
Owner filled up his 1990 ZR-1 with ethanol free fuel and drove the car home. Ran great. Went out to move it the following morning and it would not start. It would crank, just not start. Came in and I could get it to fire, but barely. I could hear the fuel pumps prime with key on. Checked fuel pressure, only 4 psi.. pulled and replaced fuel filter.. no change. Patched harness to switch to secondary fuel pump.. 5 psi at key on. Car would start, run about 3 seconds and die... no fuel from either pump.. New pump and sending unit assembly was in the car.. when I pulled the pump assembly, the hose from the Y to the fuel feed line fell off.. remember, brand new assembly in the car.. fuel pressure eventually blew the hose off the hard line.. The plastic hose clamp was positioned below the nipple! Replaced it with a stainless steel hose clamp.. fired right up.. So, don't forget to closely examine all hose connections, even with a brand new unit..20200514_094106.jpg20200514_094118.jpg Sent from my SM-G950U using ZR-1 Net Registry mobile app |
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05-14-2020
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#2 |
 
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Fuel issue solved
Nice catch Steve. Yup, never assume because you put a new part into a car that all is well, should a related issue arise.
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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05-15-2020
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#3 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Fuel issue solved
Quote:
 SOOOO true! "NEW" means nothing . What matters is what you verify by testing.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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05-15-2020
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#4 |
 
Join Date: Apr 2007
Location: Lake Bluff, IL
Posts: 2,035
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Re: Fuel issue solved
What the editor at the old Chicago News Bureau always told young reporters: "If your mother tells you she loves you, check it out". --Bob
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2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough" |
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05-15-2020
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#5 |
Join Date: Nov 2007
Location: Sunshine State
Posts: 1,071
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Re: Fuel issue solved
How/Where did you get a NEW sending unit? I been looking for a long time for a new one...
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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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05-22-2020
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#6 | |
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Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Re: Fuel issue solved
Quote:
I modified a standard LT-1/ LT-4 unit on a '96 Procharged build. Went with high flow TI Walbro 285 (470 lph). Since our LT-5 runs on one pump until WOT demands kick on the second pump, I'm wondering if this setup would work for the ZR-1.. LT-1/ LT-4 fuel pump/sending unit assemblies are readily available..23285.jpg23411.jpg23490.jpg Sent from my SM-G950U using ZR-1 Net Registry mobile app |
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05-22-2020
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#7 |
Join Date: Nov 2010
Location: Omaha
Posts: 402
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Re: Fuel issue solved
Marc has an article in the latest Heart of the Beast about converting to a single pump (page 14, Issue 56).
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Evan
2023 70th C8 HTC, 94 Admiral Blue ZR-1 SOLD - 2012 Carlisle Blue Metallic ZR1 - 800HP SOLD - Steel Blue 91 391cid ZR-1 #391 SOLD - Black 91 ZR-1 |
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05-22-2020
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#8 |
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Join Date: Nov 2010
Location: Omaha
Posts: 402
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Re: Fuel issue solved
He used a Walbro pump available from Summit Racing as PN VPN-GCA758-2.
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Evan
2023 70th C8 HTC, 94 Admiral Blue ZR-1 SOLD - 2012 Carlisle Blue Metallic ZR1 - 800HP SOLD - Steel Blue 91 391cid ZR-1 #391 SOLD - Black 91 ZR-1 |
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05-22-2020
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#9 | |
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Join Date: Aug 2015
Location: Magnolia, Texas
Posts: 884
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Re: Fuel issue solved
Quote:
I definitely think this is an option! The 285 delivers more than enough for the LT-5.[emoji106] Sent from my SM-G950U using ZR-1 Net Registry mobile app |
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Linear Mode
