obd0-obd1 harness
#31
Re:obd0-obd1 harness
Well, not all OBD0 distributors are vac advanced.
..but before you could go to "OBD1", you need to swap to MPFI "OBD0". Then, from there, you can make another harness to go to OBD1 if you still wanted to.
..though, it sounds like you wouldn't need to for that far.
I would search Honda-Tech, first, to get the information needed to be a MPFI setup of the 88-91 Civics. Then the pin-out for OBD1 Civic/Integra is in the PGMFI Wiki (http://wiki.pgmfi.org).
..but before you could go to "OBD1", you need to swap to MPFI "OBD0". Then, from there, you can make another harness to go to OBD1 if you still wanted to.
..though, it sounds like you wouldn't need to for that far.
I would search Honda-Tech, first, to get the information needed to be a MPFI setup of the 88-91 Civics. Then the pin-out for OBD1 Civic/Integra is in the PGMFI Wiki (http://wiki.pgmfi.org).
#34
Re:obd0-obd1 harness
Okay, from what I've seen so far, the PM6 you suggested is a very popular ECU choice, so that is good as far as support goes. Three things though:
1. Will this be okay on a 2.0L engine?
2. Is the 91 CRX Si distributor electronic advance?
3. Do you know how similar OBD0 harnesses are? Can I just swap ECU's, or will there be different sensors/inputs that will need to be modified?
Again, apreciate you patience on this.
1. Will this be okay on a 2.0L engine?
2. Is the 91 CRX Si distributor electronic advance?
3. Do you know how similar OBD0 harnesses are? Can I just swap ECU's, or will there be different sensors/inputs that will need to be modified?
Again, apreciate you patience on this.
#35
Re:obd0-obd1 harness
Here is all the info you need to build these harnesses.
http://www.pgmfi.org/twiki/bin/view/...KurtsOBD0-OBD1
I have built 3 of these using this guide and every car fired right up with no problems. Just make sure to take your time and double check each connection because its really easy to mix a pin or two around after soldering so many connections.
http://www.pgmfi.org/twiki/bin/view/...KurtsOBD0-OBD1
I have built 3 of these using this guide and every car fired right up with no problems. Just make sure to take your time and double check each connection because its really easy to mix a pin or two around after soldering so many connections.
#36
Re:obd0-obd1 harness
Originally Posted by robs89lxi
1. Will this be okay on a 2.0L engine?
Yes, if you modify the maps.
2. Is the 91 CRX Si distributor electronic advance?
Yes.
3. Do you know how similar OBD0 harnesses are?
I believe Accords might be a bit different than Civics. Check a Helms.
Can I just swap ECU's, or will there be different sensors/inputs that will need to be modified?
You'll probably have to swap a few wires around. Add a TDC CYP and such..
All of which would have to be done before you could go to OBD1 (if you still wanted to) anyway.
Yes, if you modify the maps.
2. Is the 91 CRX Si distributor electronic advance?
Yes.
3. Do you know how similar OBD0 harnesses are?
I believe Accords might be a bit different than Civics. Check a Helms.
Can I just swap ECU's, or will there be different sensors/inputs that will need to be modified?
You'll probably have to swap a few wires around. Add a TDC CYP and such..
All of which would have to be done before you could go to OBD1 (if you still wanted to) anyway.
#37
Re:obd0-obd1 harness
Guys, thanks for all your help. Omahaturbocivic, great link. That will be my bible when I start. By the way, the three cars you've done these in, any Accords? Jason, thanks especially for your patience ! I'll be sure to let you know how it turns out. I appreciate your suggestion on the CRX, and I think I will start out with that for my first try. If it fails, I guess I will go with the OBD1 conversion. Again, thanks a bunch.
#39
Re:obd0-obd1 harness
Originally Posted by robs89lxi
Guys, thanks for all your help. Omahaturbocivic, great link. That will be my bible when I start. By the way, the three cars you've done these in, any Accords? Jason, thanks especially for your patience ! I'll be sure to let you know how it turns out. I appreciate your suggestion on the CRX, and I think I will start out with that for my first try. If it fails, I guess I will go with the OBD1 conversion. Again, thanks a bunch.
You biggest issue may be deciding what mpfi distributor will be your best bet to fit on the motor. If you stay obd0 you could possibly use a d16a6 b18a or b16a distributor depending on if any of those can be made to fit your motor, obd1 you can use pretty much whatever distributor you can get to fit best wether that be from a newer accord, civic, integra, whatever. There may not be one that fits exact but by drilling out or cutting some of the legs you can hopefully get something to work. Like stated above you may be adding adding a few wires from the distributor to the ecu you as well as splicing in different clips.
#40
Re:obd0-obd1 harness
Hey, great info. Yeah, I've got a pinout diagram for my ol' PJ0, so I'll be doing some comparing. Is the PM6 in the '90 the same as the '91? Just wondered since you guys refer to only the '91. One guy I've seen used a F-22 dizzy ('90-'93 Accord) in his OBD swap, but it did need a bit of modifying to fit. Thanks again for the help.
PS Where can I get a pinout diagram for PM6, PR4 and/or P75?
PS Where can I get a pinout diagram for PM6, PR4 and/or P75?