OBDI vs. OBDII - Honda Prelude Forum

Dark Si · 03-06-2002, 02:34 PM

I know that OBDIs take better to mods and everything, but if OBDIs are so much better, why did Honda begin putting OBDIIs into cars? What is it about the OBDII that is better, from Honda's perspective at least? There must be something good about it, right?

SLICK96 · 03-06-2002, 02:41 PM

I think Honda did OBDII just for smog standards ... or something to do w/ emission control laws... Am I right, fellas?

Brady92/4WS · 03-06-2002, 02:52 PM

Cars from the factory arent meant to be modded, especially your emissions. I'm pretty sure that odbII makes it a lot harder for your mods to do anything, because it "learns", its just hondas way of saying "Hey **** you, stop polluting!"

Satan_SRV · 03-06-2002, 02:56 PM

It was law.

justanotherlude · 03-17-2002, 02:10 PM

What year did the ODB II's came into affect? So its possible to not get that much power increase because of the ODB II's? I am confused what the ODB I and II's do? I have a 95 Special Edition, do i fall in the category of I or II?

BryanS · 03-17-2002, 03:25 PM

OBDII was first used in 1996, so you have an OBDI car. OBDII was a newer system that the government mandated to reduce emissions. The reason it's not desireable from our point of view is that the ECU adapts on OBDII and will learn to work around the "mods" so that they don't reach their potential. OBDI doesn't do this so a mod will yield more power with that system vs the newer.

justanotherlude · 03-17-2002, 04:21 PM

Since my car is a 95 and not a 96, I have to always reset the ECU in order for my mods to be working the way it should be? So usually if I had an OBD II, I could just let the car run and let it figure itself out but the OBD I, U have to manually restart the thingy?

BryanS · 03-17-2002, 04:25 PM

no, you have it backwards, kinda anyway.

You have the more desirable OBDI system. With this you really need not worry about resetting the ECU as much as if you had OBDII. I would recommend resetting after any mods, including a new set of spark plugs or other maintanence items.

If you had OBDII you would have to reset your ECU very frequently, or do a mod to automatically reset it, so you can get and keep the max performance from your mods.