Will that work? What ecu do i need to run this engine? TIA

 

what year is the engine? My initial reaction is I think it's a 92-95 era, hence OBD1 hence would run natively off of a P08, or off of a chipped p28/p30.

-PHiZ

 

The engine is OBD-1, but looking at his sig I will assume it is in an OBD-0 CRX. To run either the PR3 or PW0 properly you will need to run two one wire o2 sensors to it. One o2 sensor will need to read cyls 1 and 3, and the other one cyls 2 and 4. The PW0 and PR3 ECUs use two o2 sensors and selectively lean two cylinders at a time, to achieve proper air/fuel ratio. You will also need to run a wire for the VTEC spool solenoid and another wire for the VTEC pressure switch. Both ECUs will run the D15B well.

 

I'd think they'd run rich, especially in VTEC. Not to mention with an 8200 rpm rev limiter, misshift and you're toast. I would just convert to OBD-I, and run a P28. Closest match you'll find in North America.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. S &raquo;</TD></TR><TR><TD CLASS="quote">I'd think they'd run rich, especially in VTEC. Not to mention with an 8200 rpm rev limiter, misshift and you're toast. I would just convert to OBD-I, and run a P28. Closest match you'll find in North America.</TD></TR></TABLE>

Very true. I forgot that I did modify the timing and fuel when I had my D15 in my CRX.

 

I asked the guy from HyperDuck tuning about this. He said the Mod'd B16"Chip" would run alright on the D15B but a stock B16 ECU would indeed suck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jim Truett &raquo;</TD></TR><TR><TD CLASS="quote">The engine is OBD-1, but looking at his sig I will assume it is in an OBD-0 CRX. To run either the PR3 or PW0 properly you will need to run two one wire o2 sensors to it. One o2 sensor will need to read cyls 1 and 3, and the other one cyls 2 and 4. The PW0 and PR3 ECUs use two o2 sensors and selectively lean two cylinders at a time, to achieve proper air/fuel ratio. You will also need to run a wire for the VTEC spool solenoid and another wire for the VTEC pressure switch. Both ECUs will run the D15B well. </TD></TR></TABLE>

wow, that's wild, ya know I've never really looked at it, and assumed the 2 O2 sensors were like on OBD2 cars: on either end of the cat...

I think his distributor is going to have the wrong number of teeth so he'll be looking at going to an OBD0 dizzy. And what about injectors, can he run the OBD1 injectors off the OBD0 ecu, as long as he <U>leaves out</U> the resistor box?
-PHiZ

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PHiZ &raquo;</TD></TR><TR><TD CLASS="quote">

wow, that's wild, ya know I've never really looked at it, and assumed the 2 O2 sensors were like on OBD2 cars: on either end of the cat...

I think his distributor is going to have the wrong number of teeth so he'll be looking at going to an OBD0 dizzy. And what about injectors, can he run the OBD1 injectors off the OBD0 ecu, as long as he <U>leaves out</U> the resistor box?
-PHiZ </TD></TR></TABLE>

If he has the OBD-1 dizzy it will not work with the PW0 or PR3. He will need to find a '88-'91 Civic/CRX Si/EX distributor and modify the mounting feet to fit the VTEC head. I am not sure about the injectors. I still think the impedance would be incorrect. I didn't use the OBD-1 injectors with mine. I ported a '91 Si manifold to match the head and used the '91 injectors with the resistor box as well.

Reversing the procedure here: http://www.hondata.com/techinjectorwiring.html I would assume he can use the OBD-1 injectors if the resistor box is removed, but I won't endorse it until I have tried it myself.

Some PR3/PW0 tech from Hondata: http://www.hondata.com/techo2problem.html