ABOUT TO DO A OBD2 GSR SWAP INTO MY 99 CIVIC EX. GONNA USE A OBD2 P72 BUT NOT SURE IF I NEED THE A OR B VERSION OF THE ECU. DID A SEARCH BUT NO LUCK. THANKS FOR ANY HELP. DONE A BUNCH OF SWAPS BUT NO OBD2(S) AND DONT WANT TO RUN A P28 AND JUMPER

 

if you have a 99 ex, using your harness you will need an obd2b ecu.

 

ps you dont need to yell (caps lock off)

 

SRY DIDNT MEEN TO TALK LIKE MY WIFE^ THANKS FOR THE HELP ANY ADVANTAGES ON USINA TYPE R ECU VS. GSR?

 

i thought obd2b P72's had immobilizer? therefore he would need an obd2b -> obd2a conversion harness for the ECU and an obd2a P72. BTW, you're still typing in all caps.

 

sry about the caps, so should i just go obd1 or whats my options trying to keep it legit for state inspection. not gonna tune it, just a basic swap its my daily driver

 

hey with this swap... did you run into any problems with the wiring harness? im in the process of doing the same swap into my 98 ek.

 

sry havent donr the swap yet just getting parts up right now

 

nah just get an OBD2A P72 and use an OBD2B-OBD2A conversion harness on your stock harness and wallah, your legal. btw i did this swap on my 99 EX as well.

 

hey i did a gsr swap on a 97 civic ex well i used the civic ex harness it hall fits in so jsut go for it.

 

i know my ex harness will work need to know if i need a jumper harness or not

 

well it depends where you live.. In California I dont think its legal to do that.. unless you can try and explain it to REF that you need a conversion harness in order to run an obd2a ecu because the obd2b has an immobilizer unit..

 

your going to need a jumper harness if you intend on running either a obd2a ecu or an obd1 ecu.. they sell it on ebay for cheap

 

it just converts the wiring AT the ECU so you can run the correct ECU

 

I'm almost positive they wont let you use a jumper harness in California, however you can always PM H-T user Katman, he has a service where he removes the factory immobilizer on OBD2B ECUs and replaces it with a dummy unit so it wont throw a CEL.

 

and also if your good with wiring you can splice your wires and make it look authentic.. of course this will take hours but sometimes that is the only way if you want to pass the visual inspection. but it will suck if they check out your ecu ports and find out that your using an obd2a ecu on an obd2b car..

 

currentyly running same setup in my 00 civic with 01 gsr swap... you need obd2b p72 ecu. you trying to reff?

 

im not 100% sure but from what i know the 00/01 ecu are the only ones equipped with immobilizer... im running one right now in my civic and didnt bypass it or anything just where ever you get your swap from ask the company to give the the key that belongs to that spacific ecu and car and tell them to give you ignition part where you insert the key because that has a sensor to activate everything.. but then again do your reseasrch because im not quiet sure thee 99 ecu has a immobilzer.

 

i dont live in california so that doesnt matter. just want to use a obd1 ecu so i can tune it.

 

^^^^THIS IS CORRECT.

Jeebus, this question is coming up like twice a week lately.

If you can get away with it in your area, the *best* solution is to go OBD2a or OBD1. OBD1 gives you tuning options in the long run. Either one doesn't require you to hack up your ECU. Legally, you are technically not supposed to run a computer that's a different OBD level than your car, which is OBD2b. So technically, you should be running the OBD2b computer.

You can remove the immobilizer yourself and it will run 100% fine, but you will throw a constant code. The only way to keep a 2b ecu and not throw a code is to get a dummy immobilizer added where the immobilizer was. Katman can do this for you.

Man, I really need to call him and get him to fix mine one of these days.