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Trouble Codes

L

lwhssh

Guest
Does my 1990 L98 have a diagnostic lead for pulling trouble codes? or are they only on newer cars. If it does, where is it?
Thanks
 
Joined
Jan 15, 2004
Messages
2,240
Location
Northern Indiana
Corvette
1987 Z52 Black Convertible
Is your SES light on?? All you have to do is take a paper clip and short out the top two right terminals, and watch the SES light blink. It will blink 12 to tell you it is in fact in diagnostic mode, then it will blink the code. Then you can find out what it is. Hope this helps.
 
L

lwhssh

Guest
It's running well but idling rough. I thought if I take it to pep boys or some other place they might be able to tell me if I need an o2 sensor. I'm replacing the distributor cap and rotor this weekend hoping that that might help. No, there are no lights on (SES)
Thanks
 

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