Car: 96 prelude SI H23A1

Swap: H22A1 w/ P13 ECU, OBD2 to OBD1 Adapter.

Using the H23 engine harness, h23 dizzy with external coil.

Swap install is complete, tried to start it but had no luck. The engine turns over but there is no spark. :lame:

Triple checked all the fuses under that dash and in the bay, checked all the grounds, checked main relay.

There is no spark from the coil so we tried a coil from a friends lude that is running and still no spark.

Electronics inside the car power up just fine, and fuel pump primes.

I thought maybe it was just a bad ECU so I tried the one from the H23 but same result.

anyone have any ideas?

 

your prelude is obd2 then right?

did you do the Ckp to ckf trick?

Odds are your not getting crank angle sensor unless you stole the signal from the crank fluctuating out of the dissy.

ill cut and copy some old notes. Im guessin this is your problem...



CKP and CKF send the same signal?
1. I just wanted to update that I tried this and it works! It is an easy way to disable the ckf sensor when swapping a non obd2 motor into an obd2 car. Just splice c1 to c4 at the ecu and c11 to c14(not sure if this is necessary or not but I did it) and you are ready to go.
I came up with this idea when I realised that the ckf had 12 points at the crank and I was pretty sure the ckp was 24 at the cam on obd1 and 2 distributors. I searched to see if any one else had tried it and this is the closest post I found to anyone even thinking of it so I am posting it to save everyone else the trouble of swapping Error! Hyperlink reference not valid. pumps.

I dont remembet the exact details but the concept is pretty simple, when the motor is running the ecu is trying to compare the ckf sensor at the crank(which you no longer have) with ckp sensor from the dizzy which both output the same 12 pulses per crank revolution(or 24 per cam revolution) to make sure your Error! Hyperlink reference not valid. is alligned correctly. All you need to do is to run the wires from the ckp from the distributor to both the ckp and the ckf and the ecu is happy. I dont have a pinout handy and you may want to search for a good obd2 pinout because the pin layout is a little more confusing on these and the pins I posted were only for obd2a, if you are obd2b it will be different. From what I can remember from that old post for obd2a you take the ckf(the crank sensor you dont have) which is pins 1 and 11(11 should be directly below 1) and cut them a few inches from the ecu, then take the ecu side and tap c1 into c4 but make sure the original c4 is still hooked up. Then tap c11 into c14(c14 is directly below c4) leaving c14 hooked up as well. Now the wires for c4 and c14 should go into pins both c1, c4 and c11,c14 respectively. The wires for c1 and c11 on the harness side stay unhooked as they went to the sensor that is no longer there anyways. Hope that clears it up for ya!

 

I have the same problem also. but mines a original H22A1 with the H22A1 body etc. cranks over but doesnt fire up at all. The car also makes a loud pop (backfires) with cranking over.
Any help?????

 

wrong firing order.

 

i will deff look into this, makes sense, but will my p13 ecu still look for those sensors together even though the motor does have them?

and your links didnt show up in ur post.