I was interested in knowing if anybody had succesfully chipped an ODB-II ECU, specifically the P5P, I understand that its much harder to do than the ODB-I. I realise that my other option would be to convert to ODB-I (using a conversion harness) and use a compatible ECU but would there be any repercussions in doing so?

Now for the compatible ECU I understand that the P13 would be my best option. Now the P13 was formely used on the H22a1 V-Tech engine now would there be any difference in using it on the H22a4?

I'm really interested in chipping this vehicle and any feedback on past success (or failures) would be greatly appreciated.