Toooo many HC's on Smog test (JDM H22)

[CB7Man]

My Setup
JDM H22A (Out of an Automatic)
Lightweight Flywheel
Balance Shafts disabled
OEM intake with Accord air box, K&N Filter
OEM Exhaust, Original Accord Cat
91 Octane Shell "Nitrogen Enriched"

Prior to intalling the Engine I cleaned the EGR ports till they were vitually chrome inside....

Anyway.
I installed 1 step hotter plugs in my engine from the very beginning.
My results were
590 rpm HC's Recorded: 358 ppm Passing: 100ppm FAIL
2700 rpm HC's Recorded: 54ppm Passing: 150ppm Pass

So I tried an F22 PT3 ECU LOL!
The results...
701 rpm HC's Recorded: 549ppm Passing 100ppm GP FAIL
2830 rpm HC'S Recorded 299ppm Passing 150ppm GP FAIL

Then I tried bumping up the idle with P13
980 rpm HC's recorded 245ppm Passing: 100ppm FAIL

So im well within the range on the "highway" test, but it just fails miserably on the idle!
Any advice? I gotta register in FEB so I need to get this done.

[wed3k]

hows the ignition?

[CB7Man]

Ignition is all BRAND NEW OEM
New wires, Cap, Rotor, 1 step hotter plugs (im going to get 2 step hotter now)
The only thing Im kinda worried about is the O2 sensor...It had some frayed wires that I saudered back together...would this cause anything?
Or do I need to get external coil? This would suck lol

[wed3k]

an o2 sensor would cause rich mixture, not incomplete combustion.

hows the compression?

[jhondayaaj]

I don't get why we still use our old cat conv. with an h22 motor. And we wonder why we fail smog. Please put a good cat on there. Your cat may pass with the f22 in it, but not the h22. And don't go hotter plugs. U might make the hc go down, but the nox might go up. Just put a good cat and a o2 sensor for h22 in it. Make sure valves are adjusted and timing is good.

[accordztech]

I don't get why we still use our old cat conv. with an h22 motor. And we wonder why we fail smog. Please put a good cat on there. Your cat may pass with the f22 in it, but not the h22. And don't go hotter plugs. U might make the hc go down, but the nox might go up. Just put a good cat and a o2 sensor for h22 in it. Make sure valves are adjusted and timing is good.

most old cats are WAYYY better than any new cat.

Hc high, what your timming....whats your other readings? Thats ALOT of HC...I may be leaning towards an O2 sensor issue.

The reason why lower idle speeds are harder to pass smog is that there is more load, and most engines clean up at higher speeds with less load.

[ATS666]

Need more info. What were the rest of the readings?

02 sensor and a cat are definantly possible.

How old is the pcv?

Hotter plugs will not make nox go up... just wanted to correct the guy above me.

[CB7Man]

We dont test nox is my area muahahah
I was told the Cat is working fine the F22 cat is the same part number as the H23 cat....same cat for a larger engine?

My other readings?
Everything is perfect except the HC's
PCV is 16 years old and works...as far as I can tell.
Timeing is 15 deg. on the money.
I want to retard it right? -2 degrees just to give me an edge.


I have a O2 sensor from my F22A4 exhaust...its slightly smaller in size but it plugs in and screws onto the downpipe, or would the reading be way different for it?

Also, does the flywheel effect my HC's? its less weight...idk

[ATS666]

Dump the timming all the way down. I passed a friends cb7 with a dead cat on it (my infered temp gun showed no difference inlet to outlet temp). It will be slow as balls but it should pass.

[CB7Man]

lol they check timeing it cant be too far off, I might be able to pass 3 deg...but im only allowed 15+-2

[ATS666]

How do you know your cat is functioning properly?
Did you put a temp gun on it? If so what were the inlet/outlet temps?

Is the 02 sensor origonal? If so change it with a new one!


What was the co reading?

[4CYLPOWER92]

In your area do they do smog tests on the dyno under load? I'm with accordztech, You need higher RPM's. If they do the 15mph and 25mph tests on the dyno, you should be in 2nd gear for the 15mph which would put you close to 2000rpms, and 3rd gear for the 25.

[wed3k]

two speed idle doesnt require NOx

[4CYLPOWER92]

So Paradise, CA region is still just doing the idle test and higher rpm tests? That's so old school. San Diego and prolly most big city areas went to the dyno sometime in the mid 90's. I know my H22 wouldn't pass an idle smog test.

[wed3k]

it depends on the population per sq ft.