Looking to get some ideas from you guys on this one since I'm new to this emissions nonsense.

History: Just picked up this hatch. PO put in d16z6 (block and head only) in it but left it at that. I guess he didnt know what else to do with it. I tried running through emissions as it stood so i can get the car registered and failed.

25/25 : HC 266 ----- 167 allowed FAIL
CO 7.07 ---- .94 allowed FAIL
NOx 275 ---- 1240 allowed PASS

50/15 : HC 246 ------173 allowed FAIL
CO 7.49 ---- .97 allowed FAIL
NOx 232 ----- 1372 allowed PASS

So over the weekend I gathered some parts to get it running how it should. Picked up a p08 manifold, new intake, Ex/si Harness, 4 wire o2 sensor, p28 ecu, cap, rotor, new plugs, ngk wireset. Everything installed cleanly and running smooth. Only thing i couldnt find was an exhaust manifold and a voice in my head keeps telling me the catalytic would be whats holding me up now. But I took it in again to see how I stood anyways

Now these are my results:

25/15: HC 62 --- 167 allowed PASS
CO .18 ---- .94 allowed PASS
NOx 1187 ----- 1240 allowed PASS


50/15 HC 179 ---- 173 allowed FAIL
CO 2.40 ---- .97 allowed FAIL
NOx 1889 ---- 1372 allowed FAIL


I'm probably going to order a cat from magnaflow as my next step. Exhaust is 2 1/4 straight through with a magnaflow pan and the VX exhaust manifold with the "cat" built in.

Any thoughts, feelings, and/or concerns would be appreciated to help get this hatchy on the road again.

Thanks in advance

 

Aftermarket converters may work for one smog session, but the inferior catalyst will manifest after the second or third test over the years.

A VX uses EGR which is a 5 wire O2 sensor. Is your EGR present and working? (It should be or you havea shitty smog tech) If I'm not mistaken, 3 Stage VTEC D15Z1?

Are you using D16Z6 ECU, and, is your smog tech even literate?

 

just curious what would the egr being present or not have to do with the competency of the tech? all he does is plug the sniffer and run the car -_-



EGR is removed since I replaced the manifold, ecu and harness as stated in the first post. but anyways I picked up a replacment exhaust manifold to remove the vx cat that has unknown amount of mileage and will be installing the magnaflow cat after the header and go for a retest.

 

Because any smog tech would fail your car for a lack of EGR, as it was required for a VX. A 5 wire O2 is also required. The fact a smog tech would run the car with inappropriate equipment is surprising.

A new OE replacement converter would most likely cure your numbers. And you never identified where it was smogged at state-wise.

I personally have no idea why you car was even allowed to be tail-piped. (I smog cars in Naperville, IL)