Can someone explain the difference...

[Hybrid1990crx]

Between OBD1 and OBD2? Im tired of hearing people talk about it and not being able to put in any of my own input.

[4drb16civic]

obd1 ecu's are in 95 and older civics, while obd2's are in 96+, if i remember correctly.

[jcrx]

>92 = OBD 0
92-95 = OBD I
96-98 = OBD II
99+ = OBD IIb

On Board Diagnostics montiors the engines emissions output, OBD 0 being the least amount of monitoring and restriction, and OBD IIb being the most.

[Hybrid1990crx]

So then for my swap, b16a1 into a 1990 crx, I dont have to change it?

[jcrx]

Right, but you may have some other wiring to do, what model CRX is it?

[Hybrid1990crx]

Its a 1990 HF.

[jcrx]

Ok good, the HF and the Si are Multi Point Fuel Injection, which means you don't have to do the conversion that a DX owner would, but yo're going to need to get the hubs off a teg or Si civic/rex, since the HF use's a smaller axles and hub, and the B series axles won't fit in them.

[Hybrid1990crx]

So I can still use the b series axles that come with the motor for the swap?

[jcrx]

You can use them if you change the hub, there's no way around changing the hubs. You have to. The HF axles won't work in the B series tranny and halfshaft, and the B series won't work on th HF hubs

[Hybrid1990crx]

what about knuckles.

[jcrx]

The whole thing, the HF knuckle is not compatible with the teg hub. You can however get the whole front suspension off a DX, Si, EX, whatever, as long as it is the same gen as yours, and no a four speed DX or a HF.