alright guys i put a 94 lt1 in my car and i am loosing some gas mileage and the speedometer is off by at least twenty miles and a few other odds and ends hear is my delima. I have what OBDII connecter on the harness but i have an OBDI connecter it is the ADLD or whatever it is connecter instead of the OBDII connector. What should i do to get a ready i have the SES light on and it is drivign me nuts i don't want it one and want to turn it off so i plan on getting some software and programming software but i need to know if i get an OBDII cable what kind should i get that will read that computer and waht software should i get and if i do it will i be able to use that same cable but different software or same software to do my 96 S-10 let me know guys your help is much appreciated

 

I had an OBDII connector on my 95, so I went to a local performance shop and bought an OBDI conversion kit. It consist of wire taps, and an OBDI plug. You just need a diagram to tap into the correct wires and you are in business. I think shbox has the diagram for both plugs on his website. Its really easy, like maybe 10 minutes, plus you can keep your factory plug.

It worked for my 95 anyways. BTW it was only 20 dollars.

- Z28WannaB

 

i have the plug already so if someone has the wiring diagram so i can convert it that would be great if not can i get teh obII connecter and use it with some obdI software so i can use this programmer and do my truck at the same tiem and what is that web page that has the diagram on it becuase my chiltons is like no help

 

Its very hard to understand what you are looking for.... but I think you might want this:

http://shbox.com/1/xraycable.jpg
What car did you put the 94 LT1 in? That might explain why you have an OBD-II wiring harness in your car. Then is appears you have a 12-pin ALDL connector (the thing hooked under the dash by the driver's knee). And you want to hook up the OBD-II wiring harness to the 12-pin ALDL connector? What PCM are you using?

Or are you saying you have a 16-pin OBD-II ALDL connector under the dash, and a scanner cable with a 12-pin OBD-I connector?

Do you see why we're confused?

Not to be mean, but some punctuation might make it a bit easier to understand.

 

oh sorry about that. I have a OBDI computer from what i have figured out. This was swapped into a thirdgen 91 camaro. 350lt1.com did the setup for me and graphed it. But they put an obdII connecter on it and i don't know if i can use that instead but what cable do i use to read the computer now.

 

The data wire on the ALDL connector is the tan wire. That's the only thing that you need to connect directly to the scanner from the ALDL connector. You can pick up 12V power and a ground anywhere its available under the dash. Might be worth making up jumpers like Shoeox did to make the connections.