Prelude_RCR

Is there any conflict between the chassis and engine? I know it's a bolt in, but what about injectors/ECU/wiring? What do I need to switch on my 4th Gen to get the OBD-II engine working? Can't I just use an OBD-I ECU? Or is the wiring different on the H22a4?

96LudeVTEC

Quote:

Is there any conflict between the chassis and engine? I know it's a bolt in, but what about injectors/ECU/wiring? What do I need to switch on my 4th Gen to get the OBD-II engine working? Can't I just use an OBD-I ECU? Or is the wiring different on the H22a4?

-Chassis conflict = None (unless you want the atts unit)
-Wiring Conflict= yes, you need 93-95 Vtec distributor and wiring if you're going to keep the OBD1
-If you want the obdII then you need to get a OBDI to OBDII adapter.

it should be a simple swap! I would suggest that you keep the OBDI as well as replacing the injectors with the ones from a 93 VTEC(more flow!)

__________________
Aldo
1996 Lude VTEC -San Marino Red RIP 4/15/05
2001 BMW 330ci -Jet Black, Premium + Sports Package - Sold
Jesus freak

Prelude_RCR

Thanx. I was planning on going with an OBD-I ECU. So all that I need is the distributor/injectors? Can I scrub them off my H23a?

Forbidden

- you'll need to use the 2 side mount of your current engine
- you'll need a 4th gen VTEC header or use the 5th gen and some creativity (the 4th gen header is longer so you'll need some extention pipe)
- USE YOUR OLD ENGINE HARNESS!!! AND SWAP IT BEFORE YOU PUT THE ENGINE IN THE CAR!!! this will save you a lot of time and trouble trust me on this
- some sensors don't use the same connector or are not at the same place so you'll have to rip apart your harness a bit
- you'll need a 4th gen VTEC ECU (from a 93-95 so it's OBD-I)
- as for the distributor you don't need an OBD-I distributor but if you want to save some trouble and be able to play with the timing use your H23 distributor or use the new distributor and mess around with the wires a bit more
- for the injectors, the ones on your H23 are smaller than any VTEC injectors so use the one that comes on the engine (you'll need to swap the injector connectors and bypass the resistor pack) or get a set from a 4th gen VTEC they should plug right in (BTW H23 injectors are 240cc peak & hold, 4th gen VTEC are 330cc peak & hold and 5th gen are 290cc saturated)
- you'll need to use your H23 fuel rail since the fuel line is on the other side on the 5th gen
- you'll probably want to use the VSS on the H23 so you can keep your variable power steering
- the power steering line of the 4th gen won't clear the VTEC head if you use the 5th gen power steering pump, use your old pump or get a hybrid PS line, I'm not sure the 5th gen PS line would fit on your steering rack I didn't get one with my engine

if you have more question just ask or go visit my page http://vgmidi.com/~jrc/engineswap

if I think of something else I'll let you know

Prelude_RCR

You are my SAVIOR! Thanx for the detailed write up! That's EXACTLY what I was looking for!

BTW, are you still running the stock H23 injectors? And are you still having idle problems?

Lastly, have you ran the car at the track? Or are you still working out the bugs?

Thanx for the info...I might be able to complete the swap this weekend! *Been out of commission for a year now* You won't believe how much dust it's collected sitting in my garage.

Forbidden

yeah I'm still running the H23 injectors but I'm about to swap to some 4th gen VTEC if I can find some or use the 5th gen I have if I can't find any 4th gen's

the idling trouble I had is gone now it was due to a small host we forgot to plug

I haven't run the car at a track yet cause there's no track around here. there's a place that does 1/4 miles each 2 weekend but I don't know if they started yet

most of the bug are fixed except for my CEL that comes on once in a while when I do a long ride (over 2h) but it goes away after I shut the car down and I haven't been able to find what caused it yet... I'm gonna have to keep a jumper wire in the car but I'm guessing it might be the injectors that doesn't give enough fuel that's why I want to change them soon