![]() |
#21 |
![]() ![]() Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,791
|
![]()
These type of issues that are often electrical and intermittent on a 30 year old car can be fixed but often the solution is not specifically identified. The solution takes a lot of patience and often is trial and error (mostly error)
![]() I have run into a couple examples .......one a water pump impeller spinning on the shaft (mechanical) and another as follows which was electrical....... Post 244 - INJ1 Fuse Keeps Blowing One solution I never tried was to remove the fuse in line and see what smokes....But that could be costly ![]() I actually picked up the 95' ZR1 500 miles away and it functioned fine all the way to my garage.......then a few weeks later the INJ1 fuse issue started 1/2 mile down the road from my garage ![]() Keep us posted in this thread and sooner or later one of us will offer the fix among many fixes offered and in the end we will not know exactly what the real fix was or how long the fix will last ![]() ![]() I have one of those electrical issues taking place on a 90' ZR1 now involving the tachometer quitting intermittently.....nothing else on the ZR1 is negatively affected or inffected........ ![]()
__________________
Left Clickable links ![]() -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS Last edited by Dynomite; 03-31-2024 at 03:06 AM. |
![]() |
![]() |
![]() |
#22 |
Join Date: Mar 2024
Location: Northeast
Posts: 41
|
![]()
I am also experiencing an intermittent no-crank when hot issue. I want to rule out the clutch safety switch. When I have the issue and I push the clutch in and turn the key to start I get a voltage drop. If I do not have the clutch in and I turn the key to start I get a slight voltage increase. Am I correct to conclude that the clutch switch is working because the voltage drop when the clutch is in is due to current being sent to the starter, and the voltage rise when the clutch is not in is due to the accessories being turned off, but no current going to the starter?
|
![]() |
![]() |
![]() |
#23 | |
![]() Join Date: Feb 2024
Location: Fairfax, VA and Springfield, IL
Posts: 41
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
#24 |
![]() Join Date: Feb 2024
Location: Fairfax, VA and Springfield, IL
Posts: 41
|
![]()
UPDATE: I had the car running in the garage while trying to tuck back some wires I had dangling still from pulling the HVAC Program Module. When moving around the wires, the car abruptly "turned off" just as it was doing while driving. So, I turned upside down and looked up around the wiring and saw this sorta "frayed" wire in the photo. Obviously I need to repair this wire but does anyone know off-hand what it powers/controls? I'm very admittedly not good with electrical but will try and look through the Electrical Supplement to the 1990 Service Manual.
Also, does "at'ing" people work in here like it does on the CorvetteForum? @Mikey |
![]() |
![]() |
![]() |
#25 |
![]() Join Date: Jul 2020
Location: Nashville TN
Posts: 314
|
![]()
@-ing does not seem to do anything on this forum. I pretty much check it daily anyway so if you are trying to reach me it is not too hard lol Corvette form on the other hand I do not frequent nearly as much.
I cannot really tell from your photo where that set of wires is at. Also difficult to determine if that is part of the original harness that has a splice in it or if those wires are part of some sort of aftermarket, radio or other accessory install. Brown wire is typically a positive power feed wire on the accessory side of the ignition. Good to know that you may have found a way to replicate the issue you were having. That harness repair should be relatively easy. |
![]() |
![]() |
![]() |
#26 |
![]() Join Date: Aug 2012
Location: Ellicott City, MD
Posts: 1,666
|
![]()
Looks like step one to narrow down the cause has been more or less determined. If that is it will be an easy fix.
__________________
Charlie __________ Dredgeguy WAZOO Member 1992 Bright Red/Black ZR1 #246 Dana 4:10 gears Polished LT5 by Haibeck Polished Fikse FM5's with Michelin Pilot Sport 2 Stainless Works headers and cats with Corsa |
![]() |
![]() |
![]() |
#27 | |
![]() Join Date: Feb 2024
Location: Fairfax, VA and Springfield, IL
Posts: 41
|
![]() Quote:
__________________
1990 ZR-1 #299, Bright Red/Red 1998 Z51 Fastback Coupe, A4, Torch Red/Oak |
|
![]() |
![]() |
![]() |
#28 |
![]() Join Date: Jul 2017
Location: West Chester, PA
Posts: 378
|
![]()
Had same issue, similar symptoms. Ended up bypassing the clutch safety sw under the drivers hush panel, no issues since. That said, yours sounds a little more complicated. If i recall, the switch wiring goes to a relay, which picks up when the safety sw is actuated. Part of the starting circuit. Intermittent shutdowns sounds like a different issue.
__________________
1990 Black/Black ZR-1 #1155 1993 White/Red coupe (Regrettably sold) ![]() Last edited by tiegsd; 04-13-2024 at 11:28 AM. |
![]() |
![]() |
![]() |
#29 | |
Join Date: Mar 2024
Location: Northeast
Posts: 41
|
![]() Quote:
|
|
![]() |
![]() |
![]() |
#30 |
Join Date: Mar 2021
Location: Crawfordville, FL
Posts: 216
|
![]()
Are your battery connections clean and tight? What is the battery voltage?
|
![]() |
![]() |
![]() |
|
|