swap help

prince22 · Post by **prince22** » Mon Nov 21, 2011 4:30 pm

can somebody plz help. I have a 98 crv b20b4 non vtec 5sp manual im droppin in my 96 civic ex and i have the wiring for the b20 engine but im missin the wiring to the ecu. what do i need and will i have to rewire under the dash?

HardCore97 · Post by **HardCore97** » Mon Nov 21, 2011 5:00 pm

you can use the harness from your ex, you will have a couple extra plugs though, but that just means you can throw a vtec head on it later and the vtec plugs will be there. you may have to lengthen a couple plugs, i dont remember, but regardless it will far easier to just use your original harness and make sure everything is plugged up to its proper sensor on the b20

fry · Post by **fry** » Mon Nov 21, 2011 7:32 pm

yeah, that ex harness should be pretty much plug and play. i know a cx harness was for my b18 in a 97, i had to repin just a couple plugs at the ecu, no big deal though

prince22 · Post by **prince22** » Tue Nov 22, 2011 1:20 am

ok cool. I also noticed on the harness that the alternator has a different plug on the b20 . will i have to use a 99 si alternator to match the plug on the ex harness as well as the distributor?

JustRob · Post by **JustRob** » Tue Nov 22, 2011 2:08 am

It sounds like you have an OBD0/OBD1 alternator on there. You need to use a '97-'01 CR-V alternator to make everything plug and play. Or do a little wiring.

http://ff-squad.com/wp/?p=425

You'll need a '97-'98 Honda CR-V distributor. A 10-pin '96-'01 Acura Integra LS/RS/GS (B18B1) distributor will work too. The '99-'00 Civic Si distributor will not bolt on. An OBD1 B20 or B18 distributor will work as well with a little wiring or an adapter harness.

http://ff-squad.com/tech/wiring/obd1-2dizzywiring.jpg

http://www.rywire.com/catalog/obd2-10pi ... 0b6734ee89