I'm trying to see if there is any difference at all in the p28 or P06 when it comes to zip chip socketing it and using hondata or some free program. I mean if it's chip...who cares which one? p06 is cheaper $30 at junk yard. My WAI got to 127° today when it was 45° out and seems I went 140mpg on a quarter tank so might be working. On the other hand it idles at around 400rpm now?! no idea on that part of the change. I plan on OBD0 upgrade to obd1 like you advised and then going the programming route for "lean burn" in my d15b with 330k miles clean shell HF. I'll get pics soon
Thanks again for your assistance and those are some sweet rides even the NA del sol!!