I have a 97 civic DX HBK. I want to swap it w/a B18B. I'm a little confused as to the whole re-wiring thing. I wanted to eliminate that. So, would getting a obd2-1 conversion harness do? This means I can get an OBD2 engine, and OBD1 ECU and not have it throw any codes? Or should I just get the conversion harness and both OBD1 ECU and Motor? Or, am I just making it seem harder than it really is if I wanted to go OBD2 (B18B) and OBD2 ECU, what are the technicalities?

 

Well I believe it is illegal in most states to install an engine that is older than the chassis.

 

Ok, I want to stay legal so that eliminates that. I've done tons of searches for this swap there's some useful info out there, but I'm still confused. I plan on using the DX harness, is it all PnP with OBD2 B18B and ECU? Does it matter what year engine and ecu I get? If I get lets say a 98 B18b and 96 p75 ECU, would it matter?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zerovandez &raquo;</TD></TR><TR><TD CLASS="quote">Ok, I want to stay legal so that eliminates that. I've done tons of searches for this swap there's some useful info out there, but I'm still confused. I plan on using the DX harness, is it all PnP with OBD2 B18B and ECU? Does it matter what year engine and ecu I get? If I get lets say a 98 B18b and 96 p75 ECU, would it matter?</TD></TR></TABLE>

No the years don't matter as long as the motor is 96+ and the ecu is 96-98. You will need to use your stock DX harness because that gen of civic has a one peice harness that loops trough the engine bay, you will have to lengthen a few plugs and change a few plug ends to accomodate the integras sensors like IACV I think it is a three wire on the DX, but only a two wire on the LS, you just color match the wires. There are a lot of small things you have to do but this specific swap is very straight forward. You will need the engine and transmission of course, and any b-series shift linkage, also you will need the 99-00 civic Si rear transmission bracket along with the cast iron mount that mounts near the timing belt on the driverside directly to the block. Do a lot of searches and you will find a lot of answers, hope that helped.

 

Yeah man, that helped tons. I've searhed the ECU thread and it illustrates the pinouts on the plug. Is it necessary to change the pin configuration on the ECU? Or will changing the plugs be better, or even the same?

 

You are just going to repin like one or two things on the plugs it is very straight forward, just follow the directions and you are golden.

 

Hey man, thanks!

 

I was doing some reading up on OBD1 and 2. would it be less problematic(in regards to tuning) to keep a obd2a motor with an obd1 ecu? All that's needed to accomplish this is the conversion harness right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by zerovandez &raquo;</TD></TR><TR><TD CLASS="quote">I was doing some reading up on OBD1 and 2. would it be less problematic(in regards to tuning) to keep a obd2a motor with an obd1 ecu? All that's needed to accomplish this is the conversion harness right?</TD></TR></TABLE>

yep

 

If I used an obd1 ECU, I wouldn't need the 2nd o2 sensor would I? How about smoging? If I had an OBD2 CA compliant cat converter, would I pass still?

 

1

 

You can run an obd1 ecu, but you are still going to need an obd2 to pass emissions in most if not all states, because they will use a scan tool in your diagnostics port and won't get a return signal with an obd1 ecu, I would wire everything up obd2 make sure it passes on obd2 then throw on the jumper harness and tune with the chipped obd1 ecu.