We swapped this into a 1998 Acura CL 2.3 5MT. The engine is from a '97 Prelude. We had some wiring issues so we ended up buying a H22A4 engine harness and moving the pins to match the CL's mid-harness. Compression is: 215, 210, 210, 215 psi. Cam timing is good.

Problem: The car is HORRIBLY SLOW!!!! When VTEC engages it BOGS! It has an OBD-II/OBD-I harness adapter and a 96 JDM Spoon Chipped H22A ECU. It's getting a code for the knock sensor and O2S. We did some looking around and apparently the knock sensor changed in the H22 when they brought it over to OBD-II. The knock sensor we need is in the 92-93 B17 Integra's and the 94-01 B18 Integra's. So that shouldn't be a problem finding one.

We've tried his F23 ECU it's not much different. He also have a '97 ECU, but it has an imobilizer so it's useless. I beat him with a borrowed '98 Integra LS ATX by about 10 cars. His car is pathetic. Any help would be appreciated.

Thank You!

 

in preludeonline and here i see most ppl encounter the same problem for some odd reason the 02 or the knock sensor cause many problems get those swapped out than go from there.

 

I'm hoping that the knock sensor code is kicking back the timing so far that it's running rich enough to show a O2S code. Hopefully I'll get a knock sensor tonight.

 

No luck on finding a knock sensor.

 

OK, tried a '95 H22A2 Prelude ECU. No Luck. Same as JDM & F23 ECU, gutless.

I was thinking, would the OBD-II/OBD-I adapter harness matter between an Accord and a CL? We are starting to think maybe the adapter harness is bad. It's Skunk2, but seems to be made cheaply.

Some people say use a GSR ECU. We'll try this next.

 

Hmm.. let me try here, ...not 100% sure...

did you check injectors?

With obd1 you have to run obd1 injectors.

If spoon ecu is p13, then it wont know how to control obd2 injectors due to different size. one is peak n hold and one is saturated. even it is been converted to obd1 but the fuel map is all wrong.

 

Nope, haven't checked those yet. I didn't realize that. There is actually an OBD-I Prelude that I should be able to use.

*** Are OBD-I Accord injectors the same size or are they smaller? ***

 

Just curious, how difficult was this swap and what mounts did you use?

 

Swap was VERY straight forward. All accesories were in the same place. If you are using the CL harness the Alternator wires need to be extended. Also the knock sensor and oil pressure sensor wires need to be extended. The wiring was kind of tough, you have to convert the internal coil F23 Distributor to an External Coil Prelude unit. We tried just switching them, but the F23 wouldn't bolt on without signifcant machining. We used the CL mounts...

 

accord injectots are too small...wont fit.

 

have you double checkled your wiring again? dont jstu assume it is 100% correct.

and what injectors are you using? also what fuel pressure are you at?

obd1 accord injectors and obd2 accord injectors are 240cc, obd1 prelude injectors are 345cc but with their lower pressure flow around 310cc, while 97+ lude injectors are 290cc and flow at 310 cc since they run higher pressure.

 

We've gone through the wiring a bunch of times. With the F23 ECU there is a EGR code... that's it. The injectors we are using are H22A4 so the 290 cc Prelude ones. I'm not sure what fuel pressure the CL runs and we don't have a gauge hooked up. I'll see if I can toss in those OBD-I Prelude injectors tonight and see if they make any difference.

 

does your car have a resistor box for the injectors?

 

No there isn't a resistor box in the CL do you need one to run the obd 1 injectors?


Modified by Hybrid-Fusion at 10:38 PM 11/11/2005

 

yes, the 96 and back injectors require the resistor box. 97 up prelude injectors do not.

 

OK, we have an '01 GSR ECU coming in. Hopefully this can kill a couple of the problems.

 

I wanna know what the outcome is.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sixgundone &raquo;</TD></TR><TR><TD CLASS="quote">I wanna know what the outcome is.</TD></TR></TABLE>

Well the outcome is the '01 GSR apparently has an immobilizer. Now we're after a '98 GSR ECU.

So now we have:
96 JDM H22A2 Spoon Chip ECU
97 Prelude ECU
98 CL 2.3 ECU
01 GSR ECU
98 GSR ECU

Wow...

 

Well, if that does not work or make a signifacant difference, I would try another route. Have you checked oil pressure?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Sixgundone &raquo;</TD></TR><TR><TD CLASS="quote">Well, if that does not work or make a signifacant difference, I would try another route. Have you checked oil pressure?</TD></TR></TABLE>

Well... we don't have a gauge, but VTEC engauges so there must be a normal ammount of oil pressure.

 

Yeh u ned that sensor. Otherwise just get a P28/p72 (or equavlient) and have them disable the O2 and Knock. But thats not the right way to fix your problem just a band aid. A Obd1 p13 will not run you motor correctly because you have smaller injectors that require more fuel pressure compared to the obd1 h22 that use less fuel pressure and a larger injector.

 

OK, here's where we're at. We got both a '98 and a '01 GSR ECU. The '98 has different pinouts. The '01 has an immobilizer. Luckily we figured out how to disable it. So now the '01 GSR ECU runs the H22A4. The thing is VTEC doesn't engauge. It has 3 codes: Ignition Mallfunction, O2 Voltage High (1st), [and the 3rd I'll have to check again on].

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hybrid-Fusion &raquo;</TD></TR><TR><TD CLASS="quote">It has 3 codes: Ignition Mallfunction,</TD></TR></TABLE>

You get this code with the other ECUs? IF so (or not), fix that code.

 

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

You get this code with the other ECUs? IF so (or not), fix that code.</TD></TR></TABLE>

Well, different ECU's look for different sensors... the CL ECU doesn't throw any codes. We'll see what the 01 Prelude does...