check engine light on
Thread Starter
Advanced
Joined: Jan 2007
Posts: 56
Likes: 0
check engine light on
OK here is one for all of you
Today for the first time the check engine light came on in my 1982.
Here is the kicker. It came on and stayed on after I turned the car off and got out. I and my step son saw it through the window..
Now it seems to have stopped. I turned the car off and stayed in the car for a few minutes. the dome light went out and the engine light stayed off. I did this again and it stayed off. So I turned off the car and opened the door,, locked it and shut the door and waited. No light.
What do you all think????
THE LIGHT WAS ON THIS MORNING!!!!!OK!!!!
New info.
When I pull the int light fuse the engine light went out and then with the fuse still out and the door open the engine light cam on. When I shut the door it goes out. So now I will go to the schematics and see what I can come up with but any help or insight would be appreciated.
NEW DEVELOPMENT.
Today for the first time the check engine light came on in my 1982.
Here is the kicker. It came on and stayed on after I turned the car off and got out. I and my step son saw it through the window..
Now it seems to have stopped. I turned the car off and stayed in the car for a few minutes. the dome light went out and the engine light stayed off. I did this again and it stayed off. So I turned off the car and opened the door,, locked it and shut the door and waited. No light.
What do you all think????
THE LIGHT WAS ON THIS MORNING!!!!!OK!!!!
New info.
When I pull the int light fuse the engine light went out and then with the fuse still out and the door open the engine light cam on. When I shut the door it goes out. So now I will go to the schematics and see what I can come up with but any help or insight would be appreciated.
NEW DEVELOPMENT.
Last edited by montez27; Jan 3, 2010 at 06:51 PM. Reason: update
Drifting
Joined: Jun 2005
Posts: 1,523
Likes: 1
From: grand prairie texas
I have not dealt with the old gm computers for awhile so I dont remember which pin that needs grounded out to put the computer into the light flashing diagnostic mode but I would check to see if it will flash out a failure code first. Hopefully someone will chime in soon to tell you which pin on the computer terminal to ground out to flash out the code. Atleast you are getting a bump on the thread.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
OK here is one for all of you
Today for the first time the check engine light came on in my 1982.
Here is the kicker. It came on and stayed on after I turned the car off and got out. I and my step son saw it through the window..
Now it seems to have stopped. I turned the car off and stayed in the car for a few minutes. the dome light went out and the engine light stayed off. I did this again and it stayed off. So I turned off the car and opened the door,, locked it and shut the door and waited. No light.
What do you all think????
THE LIGHT WAS ON THIS MORNING!!!!!
Today for the first time the check engine light came on in my 1982.
Here is the kicker. It came on and stayed on after I turned the car off and got out. I and my step son saw it through the window..
Now it seems to have stopped. I turned the car off and stayed in the car for a few minutes. the dome light went out and the engine light stayed off. I did this again and it stayed off. So I turned off the car and opened the door,, locked it and shut the door and waited. No light.
What do you all think????
THE LIGHT WAS ON THIS MORNING!!!!!
I don't think its a code issue. The engine light should not go on if the key is not in the on position.
Jim
Thread Starter
Advanced
Joined: Jan 2007
Posts: 56
Likes: 0
No key
That is correct. There is no key in the ignition when this happens. I am out of the car and it is locked like I am not coming back to it. I have a code reader so maybe I will hook it up for S&G's and see what it gives me. i posted on the crossfire injection vault so maybe those guys will have an idea with that particular ECM. Thanks for the replies.
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
That is correct. There is no key in the ignition when this happens. I am out of the car and it is locked like I am not coming back to it. I have a code reader so maybe I will hook it up for S&G's and see what it gives me. i posted on the crossfire injection vault so maybe those guys will have an idea with that particular ECM. Thanks for the replies.
Then pull the CTSY-CLK fuse.This circuit is hot at all times. It controls the interior lights etc. see if that makes it go out. It shouldn't. If it does there is a cross over somewhere.
That light is feed through the pink/black strip from the gage fuse and Brown/white strip to the ECM.
I guess it also could be the connector at the ECM. Plug 419 on connector 451.
Jim
Melting Slicks
Joined: Jul 2005
Posts: 2,740
Likes: 3
From: Aurora Ontario
OK here is one for all of you
Today for the first time the check engine light came on in my 1982.
Here is the kicker. It came on and stayed on after I turned the car off and got out. I and my step son saw it through the window..
Now it seems to have stopped. I turned the car off and stayed in the car for a few minutes. the dome light went out and the engine light stayed off. I did this again and it stayed off. So I turned off the car and opened the door,, locked it and shut the door and waited. No light.
What do you all think????
THE LIGHT WAS ON THIS MORNING!!!!!OK!!!!
New info.
When I pull the int light fuse the engine light went out and then with the fuse still out and the door open the engine light cam on. When I shut the door it goes out. So now I will go to the schematics and see what I can come up with but any help or insight would be appreciated.
NEW DEVELOPMENT.
Today for the first time the check engine light came on in my 1982.
Here is the kicker. It came on and stayed on after I turned the car off and got out. I and my step son saw it through the window..
Now it seems to have stopped. I turned the car off and stayed in the car for a few minutes. the dome light went out and the engine light stayed off. I did this again and it stayed off. So I turned off the car and opened the door,, locked it and shut the door and waited. No light.
What do you all think????
THE LIGHT WAS ON THIS MORNING!!!!!OK!!!!
New info.
When I pull the int light fuse the engine light went out and then with the fuse still out and the door open the engine light cam on. When I shut the door it goes out. So now I will go to the schematics and see what I can come up with but any help or insight would be appreciated.
NEW DEVELOPMENT.
Jim
Advanced
Joined: Dec 2007
Posts: 83
Likes: 2
From: Cramerton NC
Same problem here
Did you make any progress in locating the cause of the check engine light. Mine is doing the same thing. It either stays on when I turn off the engine and remove the key or it goes off and later comes on while the car is unattended. The check engine light is OFF while the car is running 
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