So i finally got a full gsr swap and i am going to put it in my crx.

Now i have (i think) all the smog equipment.
Gsr catalytic converter,
evap canister,
purge solenoid,
oem headers and intake manifold,
and I'll be using an aem cold air intake

Is there anything missing? The swap is 2000 obd-2 and came with a p72 ecu, but i know theres a PSP switch (power steering presure switch), and of course, i do not have power steering. Will this throw a code?

I have an ls in my crx right now but is there anything i should be worrying about?

oh yeah, I live in cali

 

how much trouble is it to wire in the obd2 data plug/terminal? i always wondered that.

 

It would've been so much easier to do an obd I swap IMO. Please Keep this updated.

 

Yeah, alot of people just do obd1 instead of dealing with obd2 problems.

 

Secondary O2 sensor.
Pressure sensor in fuel tank that you need to deal with.
CFK needs to be handled as well.

 

Doing obd1 swap and obd2 swaps are similar. The only difference is obd1 has a different dizzy with integrated crank position sensor, different plugs for injectors, also obd0 and obd1 share alternator plugs where as obd2 has a small square alternator plug,and of course less emission problems. Is the p72 you have obd1 or obd2?

 

That is NOT true. OBD2 has quite a bit more to deal with if you want to run a stock ECU.


I would assume the ECU came out of the same car as the engine.

 

I know it has a lot more to deal with but those are the main things to do to convert to obd1 considering he has his jumper obd0-obd1 harness already.

 

It's an obd2 p72.

 

Yeah i wanted an obd1 swap but this deal was just too good to pass up..

 

After hearing all these problems i would run into trying to ref an obd2 gsr is leaning me towards converting it to obd-1..

I have an obd-1 catalytic converter right now, i have pretty much all obd-1 emission parts but for an ls motor.

I think i am just going to convert it to an obd1. Is ther anything else i would need to do or find? i know i need an 0bd-1 p72 ecu now. Can i use my obd-1 dizzy, injectors, and resisor box, from the ls?

Thank you all for your input!

 

This should help http://www.locashracing.com/instructions/OBD0-OBD1.pdf and yes you could use the ls parts you just have to clip the lower ears off the ls dizzy

 

Ah - thought you were just naming out differences. Makes more sense now



OP -
You can use all the OBD2 parts or the OBD1 parts. Both talk to either computer just fine.
Going to OBD0 would be a problem.

You will have to convert your IAB solenoid with a relay or something. I think it's OBD2 that triggers with a ground and OBD1 triggers with a positive voltage.

 

Damn this is all so confusing. im doing more reasearch and i keep reading different things.

Since i already bought the obd2 stuff, i kinda want to ref it as obd2. but not entirely sure what else i need to do.

If i were to go obd1, i would probably need to get an obd1 intake manifold, obd1 p72 ecu, and not sure if i would need a new wire harness? but my setup in my car is already obd1 so im not sure. And i would probably need an obd1 evap canister from a gsr.

Is that all correct? im pretty sure there's more to it so please feel free to jump in lol

 

oh nice thanks! this helps a lot!

 

That "helpful" post was going from OBD0 to OBD1.


Nailed it!

 

Thats news that California allows Obd2-1 conversions to be smog legal. ALso if the engine was originally obd2 based on the vin/manufacture date, then it is supposed to have the emissions equipment from the same year as originally equipped.

http://www.bar.ca.gov/80_BARResource...uidelines.html

some highlights:

COMPUTER CONTROLS
If a computer–controlled engine is installed in a non–computerized vehicle, the "CHECK ENGINE" light, the Original Equipment Manufacturer (OEM) diagnostic link, and all sensors, switches, and wiring harnesses needed to make the system fully functional must also be installed.

EMISSION CONTROL CONFIGURATION
Mixing and matching emission control system components could cause problems and is generally not allowed. Engine and emission control systems must be in an engine–chassis configuration certified by the California Air Resources Board (ARB) or U.S. Environmental Protection Agency (EPA). The engine must meet or exceed the requirements for the year and class of vehicle in which it is installed.

ORIGINAL EQUIPMENT
The installed engine and host chassis must retain all of their original emission control equipment. Diesel–to–gasoline conversions must have all gasoline engine and chassis emission control systems installed (such as fillpipe restrictor, catalytic converter and evaporative emission system).



Sure you can easily meet emissions requirements with obd conversions but it should not pass visual inspection unless the inspector is crooked, incompetent or lazy.

 

First off, engines are NOT OBD.
OBD is the standard that the ECU follows for emission controls.
OBD1 and OBD2 have differences in what sensors are required (example: OBD2 requires a sensor in the fuel tank, OBD1 does not.)

The engine was offered in Integra's from 1994~2001 so it has been equipped, from factory, with both OBD1 and OBD2 systems throughout the years.
The engine is a direct replacement for all those years regardless what OBD the vehicle has.
If you replaced your 2001 Integra GSR motor with a 1994 GSR motor it is legal - just have to make sure to swap over all the OBD2 compliant parts.

He's NOT converting from OBD2 to OBD1.
His engine change would include converting from pre-OBD (OBD0) to OBD1 or OBD2.
It is his choice to go OBD1 or OBD2.


Read engine replacement and engine change.
http://www.arb.ca.gov/msprog/aftermkt/replace.htm?PF=Y

 

 

I understand all the smog equipment has to be from the same year, but is it even possible to smog a 2000 obd2 gsr converted to an obd1? i've been told that most if not all refs check the year on the head to see if it matches with the ecu? If thats true then wouldn't i only be able to ref it as obd2?