KA24DE smog, cat only and nothing else. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

tuketo · 08-15-2009, 09:42 PM

My S13 KA24DE was turbo, now that smog is up I pulled everything off.
Now everything is stock but I don't have any emission except the cat.
I wonder if it will pass smog, I know this one smog guy and he doesnt care for anything, only if it passes the sniffer is what matters.
So without the EGR, evap, and the little air pump in the exhaust, is it possible?
Any tips on what else I should do.
Maybe pull 1 of the injectors while there?
Pour something else in the tank, besides gas?
Run the engine temp cold? I have my electric fan with colder thermostat.

*awesomenick* · 08-16-2009, 09:39 AM

Mine just passed with only a cat.

What I did is, had a tank half full of gas, and dumped two bottles of HEET (basically isopropyl alcohol) into the tank. Which is a ton more than you're supposed to use, so it was pretty concentrated.

Then I drove it hard and got it pretty hot. Right when I got there they tested it. Passed with flying colors.

Not sure how strict your laws are. Probably tons worse than here.

blackrms13 · 08-16-2009, 06:33 PM

when my EGR wasnt working properly

the NOx level was at over 3000 ppm
new cat dropped it to around 1500ish...
after i fixed the EGR dropped to below limit

08-15-2009, 09:42 PM	#1
tuketo Join Date: Feb 2008 Location: Bay Area Age: 23 Posts: 20 Trader Rating: (0)	KA24DE smog, cat only and nothing else. My S13 KA24DE was turbo, now that smog is up I pulled everything off. Now everything is stock but I don't have any emission except the cat. I wonder if it will pass smog, I know this one smog guy and he doesnt care for anything, only if it passes the sniffer is what matters. So without the EGR, evap, and the little air pump in the exhaust, is it possible? Any tips on what else I should do. Maybe pull 1 of the injectors while there? Pour something else in the tank, besides gas? Run the engine temp cold? I have my electric fan with colder thermostat.

08-16-2009, 06:33 PM	#3
blackrms13 Nissanaholic! Join Date: Jul 2007 Location: 626/Riverside Posts: 1,860 Trader Rating: (9)	when my EGR wasnt working properly the NOx level was at over 3000 ppm new cat dropped it to around 1500ish... after i fixed the EGR dropped to below limit __________________ 91' 240sx Fastback

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08-16-2009, 09:39 AM	#2
awesomenick Premium Member Join Date: May 2006 Location: UT Age: 20 Posts: 794 Trader Rating: (26)	Mine just passed with only a cat. What I did is, had a tank half full of gas, and dumped two bottles of HEET (basically isopropyl alcohol) into the tank. Which is a ton more than you're supposed to use, so it was pretty concentrated. Then I drove it hard and got it pretty hot. Right when I got there they tested it. Passed with flying colors. Not sure how strict your laws are. Probably tons worse than here.