Cars Dying....
Cars Dying.... My friends 93' auto z28 is haivng a issue. Itll start up fine cold and run good until it warms up. Once the car is warmed up and its revved over 3k rpm the car dies in its tracks. I checked the fuel pressure and its perfect. Im leaning towards coil or icm or both. Once the car dies it wont start back up until it cools off alittle bit; and when it does start itll shut off again either by itself or when you give it some gas. When the car dies i pulled off the coil wire going to the opti and tested it and no spark...
The ICM and the Coil are the only things i can think of. My question is what else could cause something like this to happen?
The ICM and the Coil are the only things i can think of. My question is what else could cause something like this to happen?
Could there be anything else to cause those symptoms?
Bad coil,icm,IGN switch on column or rotor screws loose or backing out. Mine was doing this, when I removed the opti one screw was all they way out and one was loose. On a friends it would do this because of a bad. IGN switch..
Last edited by defaultexistence; Jul 20, 2011 at 07:19 PM.
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Its not the opti. The coil itself isnt shooting spark. I also doubt it would be the ignition switch. Everything else works perfectly fine expect the coil shooting spark
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Teching In
Joined: Apr 2007
Posts: 22
Likes: 0
From: Jacksonville, NC
Its probably your ECM. Mine did the exact same thing. Swapped ICM, Coil out with buddies. Still couldn't figure it out until my TCC solonoid in my tranny kept going out. It was a bad ECM all along F--ng everything up. Give it a swap. Damn 93s.
Do the tests to find out what exactly is not within spec off the www.shbox.com site. I had the exact issue with mine it would run when cold then when hot it would go haywire and then not start until it was cold again. Ended up being the Ignition Switch on the column that was burnt. Swapped it out and issue was fixed. Thought it was an opti, coil, or module and did the tets and all checked out and heard that the ignition switchs after awhile burn up and cause similar symptons.
Teching In
Joined: Jul 2010
Posts: 4
Likes: 0
From: yonkers , ny
Hey guys , this is my car. Sox is a dear friend. Today new icm and coil went in , still same problem. Dies at 3k rpm . In gear or not. We are at a loss . Next step is a used ecu or a swap maybe. Any ideas as what it could be would be much appreciated guys
Staging Lane
Joined: Sep 2010
Posts: 54
Likes: 0
From: Santa Monica, CA
Try this from shbox's website- was very helpful for myself when my car had a bad misfire- ended up just being the spark plugs
http://shbox.com/1/4th_gen_tech2.html#opti_test
I would not go that far yet... that is too bad that the new coil did not fix it though. It is not the coil wire is it?
Try this from shbox's website- was very helpful for myself when my car had a bad misfire- ended up just being the spark plugs
http://shbox.com/1/4th_gen_tech2.html#opti_test
Try this from shbox's website- was very helpful for myself when my car had a bad misfire- ended up just being the spark plugs
http://shbox.com/1/4th_gen_tech2.html#opti_test
I dont believe it to be the opti because when the car dies im not getting any juice from the coil (thus the coil/icm replacement)
Staging Lane
Joined: Sep 2010
Posts: 54
Likes: 0
From: Santa Monica, CA
Dang that sucks, I'm sorry you have not figured it out yet. I honestly cannot think of any other solutions, and I do not want to just throw ideas at you to waste your time. Try emailing this guy below-- he has helped me with a lot of little issues with my LT1, knows his stuff, also does mail order tunes...
http://www.lt1pcmtuning.com/contact/
http://www.lt1pcmtuning.com/contact/