• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

obd1



The dumpster, LOL









Okay, that was a joke, you gotta work with me here.
You mean in the way of code reading or tuning or what specifically.
 
I believe, and dont quote me, that most of your garden variety code readers out there will work on ODB I. They will state on the package and many of those you can get for under $100.

As for tuning an ODB I, that I have no clue about. Hopefully someone with more insight than I in that area will step in and let you know.
 
Reading OBD-I codes was easy. Just jam the paperclip into the diag port and watch the SES light blink. OBD-1.5 was the bastard child of GM. I've not seen many code readers that would touch it, especially 1994 +/- a year. OBD-II+ can be read easily by any of the available over-the-counter units. Most programming for the OBD-I/1.5 stuff was done with EEPROM burning, right?
 
BackInBlack said:
Reading OBD-I codes was easy. Just jam the paperclip into the diag port and watch the SES light blink. OBD-1.5 was the bastard child of GM. I've not seen many code readers that would touch it, especially 1994 +/- a year. OBD-II+ can be read easily by any of the available over-the-counter units. Most programming for the OBD-I/1.5 stuff was done with EEPROM burning, right?
Click to expand...


IIRC, there were also some that were actually OBDI programming, but had the OBDII data link connector, not the ALDL plug. so a custom harness would net you a working scanner.


but i do believe that eeproms/chips must be employed for any sort of 'tuning'
 


Man, it has indeed been a long time since I had to mess with any of that, I forgot all about the EEPROMS. Ive never dealt with ODB-1.5 or really knew about it for that matter.
 
I believe the reason GM came out with OBD-II was because they had to many problems with OBD-I not and the cost of having to replace PCMs with problems. Because OBD-I PCMs where like CD-Rs write once. This was killing them so they came up with the new memory to allow PCMs to be reflashed by dealerships.
 
Nope there is a site were you can download tunning software its called tuner cat and they go all the way up to 96 so check that out and see what happens
 
Incomudrox said:
I believe the reason GM came out with OBD-II was because they had to many problems with OBD-I not and the cost of having to replace PCMs with problems. Because OBD-I PCMs where like CD-Rs write once. This was killing them so they came up with the new memory to allow PCMs to be reflashed by dealerships.
Click to expand...


ummm no. sorry. OBDII isnt a GM thing, it's an auto industry thing. It's just more advanced logic system, allowing for better engine management. the programmable PCM's just come along for the ride.
 


I'd suggest you check out their forums there. The tuning on OBD1 is a little different bc you need to be able to burn an PROM. THe standard PROM is not usually an EEPROM (Electronically eraseable PROM). In order to do your scanning and such, you need basically just any ALDL connector you can get from ebay or any number of links. (TunerPro and TunerPro RT - Professional Automobile Tuning Software)

You could look into the "Romulator" which lets you emulate your standard PROM and then make changes and such on the fly. Its a bit more involved but it would be sweet.
 
You must log in or register to reply here.
Back
Top