Failed my emissions test - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Chew Slice · 11-12-2002, 07:32 PM

Hey everyone, I was just wondering if there is some sort of smog piping that attaches to the air intake pipe.  I just failed my emissions test so now im out of insurance till i can fix it.  The only mod to my engine is this chrome intake pipe i installed.  All the hoses are hooked up but one.  Its the hose that attaches the underside of the piping.  If anybody knows if this is a smog device thingy(in technical terms) can ya help me out?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>??? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>

Itsuki · 11-12-2002, 08:38 PM

I would suggest putting your stock intake system back on,
and if you still fail then there might be something else wrong with your car.. what year is it?

Kreator · 11-12-2002, 09:15 PM

Yeah, id say go get it checked out. There is a reaaaaly small chance that the intake is at fault. U mightbe running a tiny bit richer than before the intake, but it definately shouldn't have any effect on emissions.

Chew Slice · 11-13-2002, 01:23 AM

yeah its a 91 with 157000 km's.  Im gonna put my oem intake pipe back on and get it re-tested(hey, its cheaper than getting it checked out&#33<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt='

'>  I've also noticed that a fair bit of exhaust is coming out of the tailpipe (light greyish) so that would probably have something to do with it.

hapkido39 · 11-13-2002, 04:54 AM

I failed my emissions as well the bigggest diff made was by puttin a new o2 sensor on and then they cleaned out my egr and that got it thru

Titan · 11-13-2002, 10:28 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Chew Slice @ Nov. 12 2002,8:32)</td></tr><tr><td id="QUOTE">Hey everyone, I was just wondering if there is some sort of smog piping that attaches to the air intake pipe. I just failed my emissions test so now im out of insurance till i can fix it. The only mod to my engine is this chrome intake pipe i installed. All the hoses are hooked up but one. Its the hose that attaches the underside of the piping. If anybody knows if this is a smog device thingy(in technical terms) can ya help me out?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>??? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'></td></tr></table><span id='postcolor'>
Check to see if that hose isn't comming from the EGR valve (Exhaust Gas Resurculation).

Chew Slice · 11-13-2002, 04:41 PM

Does anyone think that if i switched my intake completely back to stock, it would do better?  I have a K&N pop charger also so im thinking that it might push alot more air than is needed, miking the car run too rich.  Is this even possible?

wpayne · 11-13-2002, 04:46 PM

Yeah, do put your stock intake back in. My friend had the same problem. I'm surprised that they even did the test with the pipe in. A lot of places won't do it if the engine isn't visually stock.

Theres also this Smog proof thing that you put in your gas tank that helps you pass smog. You can pick it up at most auto stores

Primo · 11-14-2002, 07:31 PM

Make sure your cat is warmed up...This is very important as it is the biggest part of the emissions process. Although your car may be warm the cat may not be. It usually taked about 15 minutes for the cat to warm up. O2 sensor is another big thing. hope this helps

                                          -Primo

AuburnRyan · 11-15-2002, 05:12 PM

Cat needs to be warm and you need to rev that sucker around once it's warm and before you test...Seen it numerous times that cars fail, and the tech just tells them to drive it around for about 5 minutes hard (read: revving engine and clearing out you exhaust), then re-test and pass with flying colors....No need to damage anything or ever get to redline, just clear it out!  Hope you pass.

11-12-2002, 08:38 PM	#2
Itsuki Zilvia Member Join Date: Jul 2002 Location: California Posts: 216 Trader Rating: (0) Feedback Score: 0 reviews	I would suggest putting your stock intake system back on, and if you still fail then there might be something else wrong with your car.. what year is it? __________________

11-13-2002, 01:23 AM	#4
Chew Slice Zilvia Member Join Date: Jun 2002 Location: Vancouver, BC Age: 41 Posts: 215 Trader Rating: (0) Feedback Score: 0 reviews	yeah its a 91 with 157000 km's.  Im gonna put my oem intake pipe back on and get it re-tested(hey, its cheaper than getting it checked out&#33<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/wink.gif" border="0" valign="absmiddle" alt=''>  I've also noticed that a fair bit of exhaust is coming out of the tailpipe (light greyish) so that would probably have something to do with it.

11-13-2002, 10:28 AM	#6
Titan Zilvia Junkie Join Date: Apr 2002 Location: Ontario, Canada Posts: 421 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (Chew Slice @ Nov. 12 2002,8:32)</td></tr><tr><td id="QUOTE">Hey everyone, I was just wondering if there is some sort of smog piping that attaches to the air intake pipe. I just failed my emissions test so now im out of insurance till i can fix it. The only mod to my engine is this chrome intake pipe i installed. All the hoses are hooked up but one. Its the hose that attaches the underside of the piping. If anybody knows if this is a smog device thingy(in technical terms) can ya help me out?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>??? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'></td></tr></table><span id='postcolor'> Check to see if that hose isn't comming from the EGR valve (Exhaust Gas Resurculation). __________________ Sleep Doesn't Drink Beer

11-13-2002, 04:46 PM	#8
wpayne Zilvia Junkie Join Date: Aug 2002 Location: Okinawa, Japan + Azusa, CA Posts: 563 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, do put your stock intake back in. My friend had the same problem. I'm surprised that they even did the test with the pipe in. A lot of places won't do it if the engine isn't visually stock. Theres also this Smog proof thing that you put in your gas tank that helps you pass smog. You can pick it up at most auto stores __________________ Too many people use cars as an extension of their PENIS and they make me sick. A car is to get you from point A to point B or for motorsports. Not revving around town at stop lights. Check out my mods!: 50,000watt super amp and JDM lights!! Yeah right... S13 Silvia K's I got for free (I'm in japan now)!! Woot woot! '99 25GT-T Skyline (I don't want to list all the parts) http://welcome.to/skylinegtr '92 240sx HB

11-15-2002, 05:12 PM	#10
AuburnRyan Zilvia Member Join Date: Aug 2002 Location: Northern VA Posts: 272 Trader Rating: (0) Feedback Score: 0 reviews	Cat needs to be warm and you need to rev that sucker around once it's warm and before you test...Seen it numerous times that cars fail, and the tech just tells them to drive it around for about 5 minutes hard (read: revving engine and clearing out you exhaust), then re-test and pass with flying colors....No need to damage anything or ever get to redline, just clear it out!  Hope you pass. __________________ '93 Fastback LE - Wrecked '91 Fastback HICAS and LSD - Sold '93 Fastback SE - Current

11-12-2002, 07:32 PM	#1
Chew Slice Zilvia Member Join Date: Jun 2002 Location: Vancouver, BC Age: 41 Posts: 215 Trader Rating: (0) Feedback Score: 0 reviews	Hey everyone, I was just wondering if there is some sort of smog piping that attaches to the air intake pipe.  I just failed my emissions test so now im out of insurance till i can fix it.  The only mod to my engine is this chrome intake pipe i installed.  All the hoses are hooked up but one.  Its the hose that attaches the underside of the piping.  If anybody knows if this is a smog device thingy(in technical terms) can ya help me out?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>?<img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>??? <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/confused.gif" border="0" valign="absmiddle" alt='???'>

11-12-2002, 09:15 PM	#3
Kreator Nissanaholic! Join Date: Mar 2002 Location: MD Age: 41 Posts: 1,975 Trader Rating: (0) Feedback Score: 0 reviews	Yeah, id say go get it checked out. There is a reaaaaly small chance that the intake is at fault. U mightbe running a tiny bit richer than before the intake, but it definately shouldn't have any effect on emissions. __________________ кто болеет за Зенит, у того всегда стоит!

11-13-2002, 04:54 AM	#5
hapkido39 Join Date: Oct 2002 Posts: 9 Trader Rating: (0) Feedback Score: 0 reviews	I failed my emissions as well the bigggest diff made was by puttin a new o2 sensor on and then they cleaned out my egr and that got it thru

11-13-2002, 04:41 PM	#7
Chew Slice Zilvia Member Join Date: Jun 2002 Location: Vancouver, BC Age: 41 Posts: 215 Trader Rating: (0) Feedback Score: 0 reviews	Does anyone think that if i switched my intake completely back to stock, it would do better?  I have a K&N pop charger also so im thinking that it might push alot more air than is needed, miking the car run too rich.  Is this even possible?

11-14-2002, 07:31 PM	#9
Primo Join Date: Nov 2002 Posts: 5 Trader Rating: (0) Feedback Score: 0 reviews	Make sure your cat is warmed up...This is very important as it is the biggest part of the emissions process. Although your car may be warm the cat may not be. It usually taked about 15 minutes for the cat to warm up. O2 sensor is another big thing. hope this helps                                           -Primo