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07-26-2021
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#1 |
 Join Date: Aug 2020
Location: Olympia, WA
Posts: 11
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90 ZR-1 Quit
Hey everyone..looking for some advice. Driving my 90 ZR-1 (12.5k miles) to work this morning and it suddenly quit. it felt like it just ran out of gas, but no sputtering...rpms just dropped to nothing and then out. coasted to the side of the road and tried to restart...but it just cranked away. Full tank of gas and no other issues have every popped up. I have owned the car for a year and put about 2K miles on it with no problems. Anyway the only thing i was able to glean from searching other posts was possible problem with fuel pump lines coming off in the tank. Had the car towed to our local Vette shop here, which happens to be closed today, and will talk to them tomorrow. Any other thoughts from you would be super appreciated.
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07-26-2021
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#2 |
Join Date: Jan 2021
Location: Beautiful Bavaria
Posts: 523
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Re: 90 ZR-1 Quit
Check if the car starts when cold and let it idle to warm up. During start up and cold coolant both pumps work whereas the secondary will shut down as coolant warms up. So if the engine stops the primary is likely to be out.
For sure the pros here also have more sophisticated procedures but this should be a good starting point. Good luck! Sent from my SM-G991B using ZR-1 Net Registry mobile app
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ZR-1 #638/1991 |
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07-26-2021
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#3 |
Join Date: Aug 2005
Location: Scottsdale, AZ
Posts: 2,452
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Re: 90 ZR-1 Quit
Primary fuel pump bad? Try the fuel pump jumper from Jim voter
Sent from my iPhone using ZR-1 Net Registry |
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07-26-2021
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#4 |
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Join Date: Aug 2020
Location: Olympia, WA
Posts: 11
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Re: 90 ZR-1 Quit
Thanks for the tip. I did try and start it again after we towed it to the shop (they're not open today). No luck. I'll pass the information on to my mechanics when they get to work tomorrow. Any other tips really welcome. The shop in Olympia (Capital Corvette) is really good and super supportive, but have limited experience with the LT5 so help is appreciated.
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07-26-2021
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#5 |
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Join Date: Aug 2020
Location: Olympia, WA
Posts: 11
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Re: 90 ZR-1 Quit
Just read the Jim Voter posts. Great stuff. I will try and reach out to him. thanks
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07-30-2021
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#6 |
 
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: 90 ZR-1 Quit
Fuel-Air-Spark?
Nothing to add to what Jim Voter may have said/written, but am curious to hear what you finally come up with! 
__________________
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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08-01-2021
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#7 | |
Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,689
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Re: 90 ZR-1 Quit
Quote:
Jim
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If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member |
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08-01-2021
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#8 |
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Join Date: Aug 2006
Location: McLean, VA
Posts: 3,723
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Re: 90 ZR-1 Quit
I think coolant temp triggers secondary pump shut off. If I remember correct, 167 degrees.
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08-02-2021
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#9 | |
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Join Date: May 2007
Location: Westminster, Maryland
Posts: 3,689
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Re: 90 ZR-1 Quit
Quote:
Jim
__________________
If it isn't fun, you aren't doing it right! 1990 Black ZR-1 - sold 1993 Quasar Blue ZR-1 1994 Competition Yellow ZR-1 1995 Dark Purple ZR-1 Maryland State Coordinator WAZOO Member |
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