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11-15-2019
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#1 |
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Join Date: Nov 2019
Location: Houston, TX
Posts: 2
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1991 corvette zr1 dies after it warms up!
I have a question about my 1991 zr-1, I recently had the ac compressor replaced, and now the car will run normally until it warms up and it just dies! When I try to restart it, it turns on and dies right away. Anyone have any ideas on what could cause this? Thanks!
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11-15-2019
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#2 |
 
Join Date: Sep 2008
Location: Mullica Hill, New Jersey
Posts: 2,593
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Re: 1991 corvette zr1 dies after it warms up!
Primary fuel pump
Marty |
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11-15-2019
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#3 |
Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: 1991 corvette zr1 dies after it warms up!
I’m with Marty
Had the same symptoms on my 94 right after I got it. Sure enough it was the primary fuel pump. When first started cold both fuel pumps run. After reaching 176 coolant temp the ecm shuts down the the secondary fuel pump. If the primary pump has failed there goes your fuel pressure and the engine dies. Upon restarting the ecm turns on the the secondary pump momentarily until 400 rpm is reached which allows the engine to fire briefly then die. In my case the primary pump had fully seized up from being improperly stored for a long time by the previous owner. 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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11-15-2019
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#4 |
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Join Date: Aug 2010
Location: ottawa canada
Posts: 156
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Re: 1991 corvette zr1 dies after it warms up!
Primary fuse?? since someone doing R&R . Just a possible.
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11-16-2019
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#5 |
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Join Date: Apr 2007
Location: Northern VA
Posts: 2,661
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Re: 1991 corvette zr1 dies after it warms up!
If the primary pump seized it will most likely also blow the fuse.
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
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11-16-2019
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#6 |
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Join Date: Jan 2019
Location: Seattle
Posts: 62
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Re: 1991 corvette zr1 dies after it warms up!
I'm going to second the primary fuel pump being the issue. I just had the same thing happen to mine and it was the primary pump.
Mine would run good until it warmed up and than sputter out and die. Replaced the pump last weekend and now it's running good. |
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11-17-2019
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#7 |
 
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: 1991 corvette zr1 dies after it warms up!
FYI, from time to time Daryl (sp?) (aka Gold Cylon) makes up a batch of emergency jumpers which crosses the battery power from the (dead) primary pump over to the secondary pump. The ZR-1 carries a "spare" fuel pump, but you need his wiring jig to take advantage of the secondary pump (in a pinch).
Having said that, a spare pump placed in one's emergency parts travel kit, is not a bad idea either! Welcome to the ZR-1 Net Registry (FORUM) - the brotherhood of the BEAST!  P.
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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 Last edited by Paul Workman; 11-17-2019 at 07:48 AM. |
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11-17-2019
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#8 | |
Join Date: Jan 2010
Location: Mystic CT
Posts: 2,633
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Re: 1991 corvette zr1 dies after it warms up!
Quote:
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11-18-2019
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#9 |
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Join Date: Nov 2019
Location: Houston, TX
Posts: 2
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Re: 1991 corvette zr1 dies after it warms up!
Thank you guys so much, it was the primary fuel pump, I replaced it last night and it fixed the problem! You guys rock!
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