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Atrevido · 01-19-2005, 02:15 PM

I own a Prelude 2.3 Si '92, and now in process of swap. For swap - JDM H23 VTEC engine from Accord SiR 1999. I got the ECU from the Accord, but I guess it's a wrong one. The full text printed on the ECU box reads:
2H
37820-PCF-N51
CY-EH2955A
NO, 11250 -1
Matsushita Co.

Questions:
1. Is it possible to use OBD1 P13 ECU with OBD2 engine H23 VTEC?
2. Is it possible to use OBD1 P14 ECU (my old one, non-VTEC) with OBD2 engine H23 VTEC? (I understand that VTEC will not work, but will the engine run at all?)
3. What is the code of my new ECU from Accord, is it CF?

Please help! SOS!

reckedracing · 01-19-2005, 02:29 PM

you can use a p13, but need to convert the motors electronics over to obd1 to match the ecu, i think distributor and possibly injectors are all that would need to be changed but not positive...

yes, your motor should run with the p14 minus vtec, but you would need to convert the motors elec's over to obd1...

check into a obd1 to obd2 converter, this might let you use the new ecu you got with the motor...

post pics of the motor please, i have never seen a h23vtec in real life, whats the block stamped as just h23? or h23a? or what?

B16 · 01-19-2005, 02:30 PM

This topic has been closed

Why? It is in the wrong place. Please post your topic in the right forums. Hybrid is not for suspension or interior posts. EG is not for EF questions, and so forth.

If you have any questions, please PM the moderator who closed this topic.

-The moderating Team

01-19-2005, 02:30 PM	#3
B16 Super Moderator Join Date: Sep 2002 Location: yay area, CA Age: 30 Posts: 6,730 iTrader: 0 / 0% Rep Power: 99	This topic has been closed Why? It is in the wrong place. Please post your topic in the right forums. Hybrid is not for suspension or interior posts. EG is not for EF questions, and so forth. If you have any questions, please PM the moderator who closed this topic. -The moderating Team __________________ 2005 Mitsubishi Lancer Evolution 8 2004 BMW 325i 2000 Mercedes Benz ML 430 1994 Honda Civic Del Sol VTEC (race kaa)


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01-19-2005, 02:15 PM	#1
Atrevido Member Join Date: Jan 2005 Posts: 38 iTrader: 0 / 0% Rep Power: 0	I own a Prelude 2.3 Si '92, and now in process of swap. For swap - JDM H23 VTEC engine from Accord SiR 1999. I got the ECU from the Accord, but I guess it's a wrong one. The full text printed on the ECU box reads: 2H 37820-PCF-N51 CY-EH2955A NO, 11250 -1 Matsushita Co. Questions: 1. Is it possible to use OBD1 P13 ECU with OBD2 engine H23 VTEC? 2. Is it possible to use OBD1 P14 ECU (my old one, non-VTEC) with OBD2 engine H23 VTEC? (I understand that VTEC will not work, but will the engine run at all?) 3. What is the code of my new ECU from Accord, is it CF? Please help! SOS!

01-19-2005, 02:29 PM	#2
reckedracing TTIWWOP Join Date: Dec 2002 Location: 845 Area, NY Age: 28 Posts: 14,258 iTrader: 0 / 0% Ride: 1990 sohc vtec-t hatch, 1994 Bagged S10, 1991 Lifted Mazda Rep Power: 228	you can use a p13, but need to convert the motors electronics over to obd1 to match the ecu, i think distributor and possibly injectors are all that would need to be changed but not positive... yes, your motor should run with the p14 minus vtec, but you would need to convert the motors elec's over to obd1... check into a obd1 to obd2 converter, this might let you use the new ecu you got with the motor... post pics of the motor please, i have never seen a h23vtec in real life, whats the block stamped as just h23? or h23a? or what?

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SOS! SWAP problem - JDM H23 VTEC engine