C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1992 vette killed itself

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Old Feb 8, 2013 | 04:21 PM
  #21  
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Well I just drove her home as is. I turned the key and she started right up. Alternator is working perfect by both the cars voltmeter and my voltmeter. Now I have no idea...
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Old Feb 8, 2013 | 04:59 PM
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Originally Posted by nickgost
Well I just drove her home as is. I turned the key and she started right up. Alternator is working perfect by both the cars voltmeter and my voltmeter. Now I have no idea...
Starting a new list for you:

Check the two ground straps inboard of the battery. Disco and scuff the mating surfaces looking for signs of corrosion.
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Old Feb 8, 2013 | 05:02 PM
  #23  
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Ok I will check that. What are possiable grounds/ connections that are problematic to the starter?

Also VATS... Should I try hacking that yet? Or should I wait?
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Old Feb 8, 2013 | 06:46 PM
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Actually a loose battery cable at the battery would be my guess. VATS will not shut down a running engine. If it will not turn over and the security light stays lit then that is a VATS issue.
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Old Feb 8, 2013 | 06:50 PM
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Ok when I get home I will also check the battery cables. But the only problem that I see with that is it seemed like all other systems had power except for the starter.
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Old Feb 8, 2013 | 09:26 PM
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I don't want to scare you, but my chevy truck was doing the same thing. Would shut down like you turned off the key. Radio and everything would continue to work correctly. On the truck it actually turned out to be the multi function switch (ie blinker hazard switch) not sure what went bad but it would kill the truck at first it would do it when hitting the blinker then would do it at random. Not sure if its tied into your car like my truck or not. Btw the truck is a '95 silverado
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Old Feb 8, 2013 | 09:59 PM
  #27  
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following
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Old Feb 9, 2013 | 02:39 AM
  #28  
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Man...I'm sorry to see (and say) this, but you're getting some TERRIBLE advice in this thread. I apologize on behalf of the forum.

Let's review the symptoms:

*92 vette decided to shut its self off at about 30mph.
*I turn the key i believe I hear the fuel pump and power antenna run and then when I turn the key to initiate the starter nothing happens. When I say nothing happens I mean no click no nothing.
*I have had a problem with the opti-spark shutting the car off but I just replaced it, and during that problem the starter always turned over. And just for the record no my battery is not dead.

If you have a good battery (and it seems likely that it's not SO dead as to not even "click"), then the next thing to check is the primary starting circuit, power to the start/fuse box and VATS (does the security light blink when you turn the key to "on"?)

I completely agree that it is not a fuel problem. Why would someone say that when the problem is clearly that the starter isn't cranking the engine?

Last edited by Tom400CFI; Feb 9, 2013 at 02:45 AM.
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Old Feb 9, 2013 | 07:45 AM
  #29  
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Originally Posted by Tom400CFI
Man...I'm sorry to see (and say) this, but you're getting some TERRIBLE advice in this thread. I apologize on behalf of the forum.

Let's review the symptoms:

*92 vette decided to shut its self off at about 30mph.
*I turn the key i believe I hear the fuel pump and power antenna run and then when I turn the key to initiate the starter nothing happens. When I say nothing happens I mean no click no nothing.
*I have had a problem with the opti-spark shutting the car off but I just replaced it, and during that problem the starter always turned over. And just for the record no my battery is not dead.

If you have a good battery (and it seems likely that it's not SO dead as to not even "click"), then the next thing to check is the primary starting circuit, power to the start/fuse box and VATS (does the security light blink when you turn the key to "on"?)

I completely agree that it is not a fuel problem. Why would someone say that when the problem is clearly that the starter isn't cranking the engine?
my 97 would do this occasionally, (especially when it rained) and I could jump it with a screwdriver, but would only run about 3 seconds, and die. Try cleaning your key or trying a different one. As Tom said, your security light should be blinking, (not solid) when the key in the on position.

To bypass the VATS, you need to measure the resistance of the chip in your key. Using a volt meter, set it to ohm at 20k. Touch the leads to either side of your key, and measure the resistance. Once you determine the resistance, you will have to get resistors to match your ohm number. You can get restors from radio shack, or if your poor, like me, you can rape an old computer, or any electrical device your done with. You may have to solder several together to get the desired resistance. You don't have to come up with the exact resistance, but you have to be within 20% of the value on the ohm reading.

Once you have your part fabbed up, remove the driver side kick panel, and find the orange wire coming from the ignition switch, (actually orange sheathed) and cut the wire. Warning: Make sure you have the orange wire, NOT the yellow! Yellow is for your airbag, in fact you should pull the airbag fuse. Inside the orange wire you will find 2 small wires, (you will be working with the lead going under the dash, not the one going to the ignition switch) so cut accordingly, and leave yourself enough lead to work with. Now you want to strip the 2 wires inside the orange wire, and solder in your newly made resistor. One end to each lead.

Now test it! Key on. Security light should be blinking again, and the car will start. Make sure your work is all taped, and secured, and reassemble the kick panel, and replace the airbag fuse. Now you will never have to worry about this issue again. h
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Old Feb 12, 2013 | 05:05 PM
  #30  
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She has been starting without issue now for a few days... I know it is GOING to happen again, the only question is when. Im thinking about just bypasing VATS anyway because it could be the problem, and because it will fail at some point. Maybe i'll wire in a secret switch from VATS to let the car start.
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Old Feb 12, 2013 | 05:23 PM
  #31  
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Here's a good how to. h

Last edited by hemivett; Feb 12, 2013 at 05:31 PM.
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Old Feb 12, 2013 | 06:43 PM
  #32  
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Thats exactly what ill do. Eccept with a bit better resistor set-up and not having them clumpted togeather. I might just put them on a tiny board. And there is going to be atleast one secret switch, maybe two if I feel like I hate myself enough.
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