ECU-ish

[Topend]

I think New members should get one freebee post even if EVERYBODY ELSE already knows right? Ok here is mine....whats the difference between OBD-I and OBD-II? Is it the same as BMW's OBD's cause if it is than I already know and it sucks since im #2. thanks!

P.S. I've looked around at different forum-based sites and chose yours because for the last two weeks ive been able to find out answers simply by using the search tool. Hats off to your knowledge.

[Nors]

obd 1 = onboard diagnostics 1
obd 2 = onboard diagnostics 2


http://www.obdii.com/


You can read up on them, its kind of hard to explain.

[Provocateur]

Depends on what the car is used for. OBD2 is more advanced and will allow the driver to know more about what is going on with the motor because it has more sensors. Also, the OBD2 code is based on logic, so it will learn proper injection, timing, etc for maximum efficiency.

OBD1 is better if you are looking for some extensive modifications because it is chippable and doesn't use logic, so it can be easily manipulated into what you want it to do.

[TheOtherDave™]

I think New members should get one freebee post even if EVERYBODY ELSE already knows right? Ok here is mine....whats the difference between OBD-I and OBD-II? Is it the same as BMW's OBD's cause if it is than I already know and it sucks since im #2. thanks!

P.S. I've looked around at different forum-based sites and chose yours because for the last two weeks ive been able to find out answers simply by using the search tool. Hats off to your knowledge.

Welcome to the board.

The specific differences between OBD-1 and OBD-2 ECU systems varies by manufacturer. But the additional requirements were developed by the federal government.

In a nutshell, the addtional requirements that begat the development of OBD-2 were developed to:
a) standardize the datalogging protocol and hardware.
b) incorporate additional sensors to more accurately monitor the emissions control system.
c) ruin the lives of automotive enthusiasts whilst providing an unending revenue stream for mechanics.