in need of SOHC ZC info

[04sleepa]

Ok recently I bought a 91 crx dx. I believe it was supposed to come with a d15, but a ZC was swapped into it. Everything Ive seen about the motor up until now is that its very similar to the d16a6 but with a more aggressive cam. Does anyone know anything else about this motor?? What ecu should I be running? (currently a pm5) Would a pm5 cause me to not pass emissions like it is now?? Is it DPFI or is it MPFI? Why do I have an old school looking throttle body lol?? Any info will be greatly appreciated!!!

Thanks

Only pic I have of the engine bay right now. If the weather is better tomorrow I should have some better ones up!!

[solblu]

As long as it's dual point it needs the dual point ECU. The intake manifolds and distributors are interchangeable, so someone probably just swapped the long block out.

The pic shows a DPFI motor.(dual point)

Basically a SOHC non-VTEC ZC is an A6. Do you have any CEl's on? Is it noticably rich or lean?

[04sleepa]

When the pm5 is in i dont throw any codes but when I put the pm6 in I threw code 4 and code 16. 4 being the cas and 16 for fuel which i believe has everything to do with me not having mpfi. So for the time being I put the pm5 back in. Hopefully this weekend I will be doing the mpfi swap, my only hang up is that I found out about an hour ago that I need the si engine harness. As far rich or lean, nothing noticeable is going on.

[solblu]

It's probably a bad o2 sensor or bad cat causing your emissions problem. I'd pass emissions before I went MPFI.

Does it have a CAT installed? Has it been gutted?

[04sleepa]

The guy who I bought the car from just put a new cat on it about 2 weeks ago but never bolted the flange completely flush so there is a very noticeable gap. Im fixing that today. As far as a bad o2, wouldn't it throw a code??