phillip_o_hj

I need some help getting my 1992 civic cx with a d16z6 swap to pass Ca smog. Its got an Aem cold air intake, 9lb fly, pace setter headers, custom 2" exhaust with cat & no name muffler (about a year and a half old). No check engine light.
I have never gotten into emissions so I don't know what I should be looking to replace. Any help would be appreciated.

Here's the numbers from the failed test:
ignition timing= 14*btdc

15mph: fail, gross polluter
%CO2: 14.4
%o2: .3
HC- max:96, meas:141
CO- max: .59, meas: .60
NO- max:859, meas:2543

25mph: pass
%CO2: 14.9
%O2: 0.0
HC- max:79, meas 79
CO- max: .51, meas: .32
NO- max:798, meas:652

Former User

Have you done a full ignition system tune up? The ignition timing should be set to 16-degrees BTDC.

Does the CEL work? Do you have the correct ECU and distributor?

phillip_o_hj

The cel works. The swap i bought had a bad dizzy and was giving me a code 9. New distributor installed, no more codes. Ecu is a p28 from a manual. I put in new spark plugs as well. The motor runs strong, not like its getting a weak spark
The nox is WAY off, thats why this issues has me stumped. My dad (old school mech) keeps telling me that these civics require a special cat.

Former User

Again, the ignition timing is not perfectly set to spec. And your HC is also very high. I'd consider a bad cat, but your HC and NOx pass at higher rpm. Is the new distributor OEM and the correct one? If not, that could be the problem. Are the spark plugs NGKs and properly gapped? Are the plug wires old?

phillip_o_hj

The new dizzy is from autozone, its the right one (vs non vtec model?), and has be re-adjusted. New plug wires installed yesterday as well. Cap and rotor have less than 1k miles and look to be in good condition. All 4 plugs are NGK V-power, gapped to .044.. Seems to be running about the same, no noticable difference. Going in for my free retest tomorrow after work. If it fails again, should I be looking to replace the cat?

Aylem1

i need help with that too can anyone help me i have a 98 honda civic ex with a b20b and intake,headers,gsr tranny and a new apexi ws2 exhaust system with a catalytic converter so let me know if anyone can help me two

phillip_o_hj

So I passed the test today. Had a new cat and pcv valve installed this morning. Before, it was tested as a 1.5l this time out was tested as a 1.6. NOx dropped to 351@15mph and 0@25mph, CO 0.13@15 & 0.02@25, HC 108@15 & 39@25. Although it passed, I'm a little concerned about the Hc count because it measured at the max limit @15mph.

Aylem1

well i found a hook up in cali so im happy about that dont have to go thru all the hassle n bs got my car to pass smog

jmaze

phillip, how did you get them to test it as a 1.6 instead of 1.5. Did you have it barred?