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

93 LT1 Shuts Down While Driving

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Old Jul 21, 2018 | 05:40 PM
  #21  
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Default Did u fix problem? Can u call9548267320 plz

Originally Posted by zilla24
Hello all
I am new here and desperately looking for help. After reading some of the other threads I figured I can find some good help in this forum so here I am.

I have a 1993 LT1 my wife and I bought about a year ago. Now its time for the problems to start I guess.

The car will just shut down while driving. It runs great and then will just turn off. I pull over and wait a moment and it then starts right back up. I am mostly a Harley mechanic but have some car experiences under my belt. (mostly pre-electronic controls but I am no dummy) Not sure where to start and looking for some assistance as it is a bit frustrating.HELP!!!

I also noticed that I have the selection (green) indicator light on the climate control blinking and today when it shut off the LCD for the climate control went to a dash and line _ _____ (basically blank)
and nothing worked. I turned the car off and re-started it and was back to a normal readout but still had the flashing light. I was looking at some suggestions in another thread (ECM Crapping Out?) According to what I read in there I should be hunting down a possible bad ground? I am going to try and locate the bundle of grounds located near the oil filter / bell housing?? and make sure they are all making good contact. Could the shutting off and the climate control be related?

There is also an oil leak on the drivers side at the rear of the engine that runs down onto the driver side cat. Don't know if the oil leak is a contributor to this. Cant see where it is coming from exactly. Almost looks like its coming from the head.

Yes I have some work to do but we love this car and want to get it right so we can enjoy it. My wife loves driving it and I don't want her stranded somewhere.

Repair history since I have owned the car:
Replaced the Optispark unit
Ignition Module
Coil
Water-pump
Brake Booster
Fuel Filter
Various vaccume lines
Can u call me 9548267320. I have same problem today. Shuts off
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Old Jul 23, 2018 | 10:04 AM
  #22  
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Originally Posted by zilla24
Hello all
I am new here and desperately looking for help. After reading some of the other threads I figured I can find some good help in this forum so here I am.

I have a 1993 LT1 my wife and I bought about a year ago. Now its time for the problems to start I guess.

The car will just shut down while driving. It runs great and then will just turn off. I pull over and wait a moment and it then starts right back up. I am mostly a Harley mechanic but have some car experiences under my belt. (mostly pre-electronic controls but I am no dummy) Not sure where to start and looking for some assistance as it is a bit frustrating.HELP!!!

I also noticed that I have the selection (green) indicator light on the climate control blinking and today when it shut off the LCD for the climate control went to a dash and line _ _____ (basically blank)
and nothing worked. I turned the car off and re-started it and was back to a normal readout but still had the flashing light. I was looking at some suggestions in another thread (ECM Crapping Out?) According to what I read in there I should be hunting down a possible bad ground? I am going to try and locate the bundle of grounds located near the oil filter / bell housing?? and make sure they are all making good contact. Could the shutting off and the climate control be related?

There is also an oil leak on the drivers side at the rear of the engine that runs down onto the driver side cat. Don't know if the oil leak is a contributor to this. Cant see where it is coming from exactly. Almost looks like its coming from the head.

Yes I have some work to do but we love this car and want to get it right so we can enjoy it. My wife loves driving it and I don't want her stranded somewhere.

Repair history since I have owned the car:
Replaced the Optispark unit
Ignition Module
Coil
Water-pump
Brake Booster
Fuel Filter
Various vaccume lines
When my 93 starting having intermittent problems it would just not restart sometimes. Cycling the key a few times would get it to start. Then it started not starting sometimes when cold but would start the next day. Then it started having weird things like the security light would flash while driving and it wouldn't restart but if the light didn't flash it would restart, etc. I determined it might be the ECM and had it sent out for rebuild and it's started every time since installing rebuild one in December. If you search natrlone93 you will find a thread I had called another non start thread or something like that. I listed the weird things it was doing.

Last edited by Natrlone93; Jul 23, 2018 at 10:06 AM.
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Old Jul 23, 2018 | 09:19 PM
  #23  
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What optispark was put in? The chinese replacements are garbage. You must use one with an oem quality mitsubishi optical sensor. Add a custom vent harness also (like 95/96 model years have).

before saying you have a faulty ecm, make sure eveything is tight.

i had an issue where every time i got on it, it died from the accel g-force. I wasted a lot of time checking ground thinking i had a battery cable or - ground issue.

turns out, the ecm ‘chip’ was falling out of the socket under accel forces (it had a piggyback adapter setup for the aftermarket tuning i had). Man was that a peculiar problem to solve !

Last edited by dizwiz24; Jul 23, 2018 at 09:20 PM.
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