First off I want to say thanks in advance for anyone who helps me here. This is my first post here and I'm glad to have finally made an account. I've used the forum as a source of information for a while, but I haven't been able to find the answers I'm looking for with the search engine this time...
I have a '95 Caprice 4.3L Sedan, and I am beginning to get the impression that my trouble codes can only be obtained through a very specific scanner, or an ALDL cable to software on a laptop/phone. Is this correct?
I have tried the trick of "jumping" the pins on the OBD1 plug, the cooling fans come on and the check engine light (CEL) stays on. I purchased a scanner for GM OBD1 cars of my year that AutoZone said was compatible, but the same thing happens. Here's a link to the scanner I bought: INNOVA 3123
My CEL is coming on while driving, after about 5 minutes or when my engine warms up. This happens immediately after I feel a small bump, like it's shifting gears, and when this happens, my car acts like it's got the scanner or the jumper wire on the OBD1 port... the fans both come on and additionally, I start getting TERRIBLE fuel economy. I'm spending twice as much on gas as I used to since this began.
One interesting observation, this seems to come and go sometimes. Only thing to note about this is that the CEL seems to go off more often when it's colder outside. Cold being a relative term, since I live in FL. Also, and I doubt this has anything to do with it, but it seems to go away while driving more often when I have a full tank of gas as well.
Any information at all, even speculation would be appreciated. I know this is the place to be asking!