Obd2 to Obd1--Do I need both ECUs?
11-26-2013, 11:42 AM
#1
Honda-Tech Member
Thread Starter
Obd2 to Obd1--Do I need both ECUs?
Hello, HT. I previously had a D16Y8 in my 1999 EK (OBD2), and recently swapped in an OBD1 B18C1 (1994 GSR). I had someone do the swap for me. I'm not sure if how OBD conversions work, but it seems like I have 2 ecus sitting in the passenger side of my car. It's kind of difficult to tuck them away somehow since there isn't a lot of room to put away both of these ecus. I noticed that one of the ECUs (the smaller one) has absolutely nothing connected to it but it's being held on by a red clip. Can I just remove that clip and get rid of the smaller ecu? Nooby question, I know.
11-26-2013, 11:59 AM
#3
Honda-Tech Member
Thread Starter
11-26-2013, 12:06 PM
#4
Technical Hero
Join Date: May 2002
Location: Charlotte, NC, 28227
Posts: 9,876
Likes: 0
Received 28 Likes
on
20 Posts
Re: Obd2 to Obd1--Do I need both ECUs?
Just guessing you're from CA? If so you won't pass emissions with the one that's plugged in. What is the code on the other smaller ECU?
Check here and post it
http://www.hondata.com/techecuid.html
Check here and post it
http://www.hondata.com/techecuid.html
11-26-2013, 12:09 PM
#5
Man U FTW
Re: Obd2 to Obd1--Do I need both ECUs?
11-26-2013, 12:18 PM
#6
Honda-Tech Member
Thread Starter
Re: Obd2 to Obd1--Do I need both ECUs?
Just guessing you're from CA? If so you won't pass emissions with the one that's plugged in. What is the code on the other smaller ECU?
Check here and post it
http://www.hondata.com/techecuid.html
Check here and post it
http://www.hondata.com/techecuid.html
Edit: Yes, I'm from Cali haha
11-26-2013, 12:20 PM
#7
Technical Hero
Join Date: May 2002
Location: Charlotte, NC, 28227
Posts: 9,876
Likes: 0
Received 28 Likes
on
20 Posts
Re: Obd2 to Obd1--Do I need both ECUs?
You won't pass with the OBD1 ECU. The other ECU is your stock ECU and can't be used with your current engine. To have a chance of passing you'll need a 96-99 P75 with a jumper harness. However having an older engine in a newer car doesn't fare to well for you either.
Trending Topics
11-26-2013, 12:24 PM
#8
Honda-Tech Member
Thread Starter
11-26-2013, 12:27 PM
#9
Honda-Tech Member
Thread Starter
Re: Obd2 to Obd1--Do I need both ECUs?
You won't pass with the OBD1 ECU. The other ECU is your stock ECU and can't be used with your current engine. To have a chance of passing you'll need a 96-99 P75 with a jumper harness. However having an older engine in a newer car doesn't fare to well for you either.
11-26-2013, 12:50 PM
#10
Man U FTW
Re: Obd2 to Obd1--Do I need both ECUs?
^^I've said it a million times...i'm so glad i dont have to deal with that nanny state bullsh!t. I haven't owned a car that would pass Cali smog yet...
11-26-2013, 01:01 PM
#11
Honda-Tech Member
Thread Starter
Re: Obd2 to Obd1--Do I need both ECUs?
It's a hassle getting cars to pass smog. Saddest part is that smog shop workers aren't required to tell you what's wrong with your car if it fails a smog check
Thread
Thread Starter
Forum
Replies
Last Post