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Old 02-13-2023   #8
fastpace
 
Join Date: Mar 2022
Location: Houston, TX
Posts: 39
Default Re: 90 ZR1 Randomly Dies

Quote:
Originally Posted by aafc View Post
I had this same problem last year on way to National Corvette museum. On I-75 north in Georgia. Cruising along at 75 mph fuel pressure drops, pull over called AAA for tow. After setting for awhile at auto shop I was able to restart car. At this point I decided to go back home ( The Villages ). Car stalled 3 more times by the time I got home.
After checking I was able to isolate the cause of the failure. Fuel pump
relay# 1 would lose power at times.
Using the 8A section page 8A-22-6. That relay controls fuel pump relay #2
Replace fuel pump relay #1( 20 plus years old ) and car started right up.
No guarantee that this might be your problem, but it gives you something
to look at.
Hope this may help you.
John
1990 white/black # 2546
one of a few 4l8OE eq ZR-1's
This is a very interesting thought and would be a pretty easy check, thanks!

Quote:
Originally Posted by secondchance View Post
About 1500 miles ago I replaced to single fuel pump, new injectors, new spark plugs, and replaced some vacuum lines

When you say single fuel pump, you mean modified pump running on one pump?
I used the Flyman pump assembly, you end up removing/isolating the 2nd pump wiring.

https://www.zr1.net/forum/showthread.php?t=33899
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