Failed Emissions Test!

sleeprlegendcp · 08-23-03, 04:58 PM

Hey everyone!
I just had my emissions tested and failed. Everything was fine except my NO. I had 2113 ppm on the 25/25 test. 796 ppm is passing. On the 50/15 test I got 2273 ppm with 879ppm being apassing. I was told it is probably the EGR, which I have not replaced yet. I just wanted to know if any of you have any input before I get dirty. Thanks!
Later!
Lee

Reno5658 · 08-23-03, 11:49 PM

ok test the egr if it's working. If you have a vacuum pump, then just disconnect the vacuum hose to the the egr and apply vacuum to the diaphram (egr). The engine speed should stumble or it could even die. This is a good sign showing that the egr is working. Now if the idle speed remains the same, it could be that the passages are clogged with carbon (which it could possible be). Clean it out.

Note: If you don't have a vacuum pump, use your fingers to squeeze the diaphram from underneath.

Note: Have you checked your pcv valve?

sleeprlegendcp · 08-24-03, 09:04 PM

Quote:

Originally posted by Reno5658
ok test the egr if it's working. If you have a vacuum pump, then just disconnect the vacuum hose to the the egr and apply vacuum to the diaphram (egr). The engine speed should stumble or it could even die. This is a good sign showing that the egr is working. Now if the idle speed remains the same, it could be that the passages are clogged with carbon (which it could possible be). Clean it out.

Note: If you don't have a vacuum pump, use your fingers to squeeze the diaphram from underneath.

Note: Have you checked your pcv valve?

Thanks! I recently cleaned the whole throttle body. I took the whole thing off and cleaned it with tb cleaner. I am wondering if the cleaner might have damaged something. I am also curious if a line might have a crook in it. I should be able to get in the engine tomorrow, so I will know more then. I have not done anything with any of the sensors or valves on the car yet. She is at 135k. Thanks again!
Later!
Lee

dap0901 · 08-24-03, 09:19 PM

Same happened to me... I failed emissions three times in a row. I had my catalytic converter replaced, PCV valve, EGR valve, and oil change. I failed the No x ppm on the 50/15 test. After my mechanic did all of the above plus other misc. stuff it passed.

sleeprlegendcp · 08-24-03, 10:14 PM

Quote:

Originally posted by dap0901
Same happened to me... I failed emissions three times in a row. I had my catalytic converter replaced, PCV valve, EGR valve, and oil change. I failed the No x ppm on the 50/15 test. After my mechanic did all of the above plus other misc. stuff it passed.

I found the PCV valve at advance auto parts for $4.99, but I can't find the EGR Valve. Do I have to go to Acura for that? Do I need the gromet for the PCV valve and the casket for the EGR? I guess I will be getting my manual out tomorrow.
Later!
Lee

sleeprlegendcp · 08-24-03, 11:57 PM

I just found the EGR Valve Assembely on a web site. It shows $161.63 retail and $129.30 their cost. Is this in the right price range?
Later!
Lee

LeoLegendATL · 08-26-03, 04:04 PM

You don't need to replace the whole thing, it is probably clogged, just take it apart and clean it out.

Reno5658 · 08-26-03, 07:00 PM

sleeprlegendcp: Just follow what i told you to do. This will determine whether or not your EGR valve/passage is clogged. Just to let you know, i had my emissions done today. Pass with flying colors

15MPH Limit/Reading
HC: 96/25
CO: 0.53/0.01
NO: 733/489

25MPH Limit/Reading
HC: 93/50
CO: 0.52/0.04
NO: 664/489

LEGENDmadnez · 08-26-03, 07:51 PM

I failed mine too...my check engine light was on and my egr was clogged. my mechanic knew of that and wat he did was he put a big big a$$ shop fan and let it blow in the front and did the test and I passed.

try that for a quick pass and fix other things later

gator_shawn · 12-06-06, 10:01 PM

My Acura legend 95 failed emissions. It had miniscule numbers vs. allowable on all tests but NOx where it was like 965 with 780 allowable.

Based on the limited data I can find on the net, this suggests maybe a clogged EGR valve.

Does that sound right?

Is this something I can remedy with a spray cleaner? Do I have to physically remove the EGR valve ass'y? Where is it?

***LegendGS*** · 12-06-06, 10:15 PM

There's a DIY for the EGR posted here.

The method that I used successfully is documented here.

LPB · 12-08-06, 06:38 AM

You can certainly test the EGR. Before "throwing an EGR" at the problem, you need to remove the EGR - Intake Manifold pipe and check for a blockage. It tends to carbon up at the pipe connection at the intake. It is a major PITA to get to as working space is extremely limited.

94coupe · 12-08-06, 01:50 PM

I know how you feel. I just recently failed my emissions and I had to get my EGR cleaned to pass.

whyteLegend · 12-08-06, 01:56 PM

Same here I failed this year my Nox level was high ..So I removed and cleaned the EGR valve and the line it was blocked up with built up carbon .. after that I passed .. As LegendGS mention that DIY will help follow it ..

Mentok · 12-22-06, 04:49 PM

I too have failed NOX in California. I replaced the Cat, the EGR, cleand the EGR port, and replaced an O2 sensor. I use only 91 Octane fuel from 76 (pro-power) or Chevron (Techron). What other causes could there be for a NOX reading of over 1100ppm?

The guy who performed the test suggested that it was possible that if I had a blown headgasket (I have) that the result of shaving the head and replacing the gasket would cause a smaller headspace and therefor greater compression. This greater compression he said, would cause a hotter burn. As I understand it, a hotter burn is what causes higher NOX. Have any of you heard of this?

Has anyone who has blown a headgasket later passed the strict smog tests that California and other states require?

Mentok
93 Legend

08-23-03, 04:58 PM	#1 (permalink)
sleeprlegendcp Registered User Join Date: Jan 2002 Location: . Posts: 10,099 Car 1: . iTrader: (0)	Failed Emissions Test! Hey everyone! I just had my emissions tested and failed. Everything was fine except my NO. I had 2113 ppm on the 25/25 test. 796 ppm is passing. On the 50/15 test I got 2273 ppm with 879ppm being apassing. I was told it is probably the EGR, which I have not replaced yet. I just wanted to know if any of you have any input before I get dirty. Thanks! Later! Lee __________________ National Acura Legend Meet 2008 - 4th of July - Chattanooga, TN - Click Here!

08-23-03, 11:49 PM	#2 (permalink)
Reno5658 E*koden Join Date: Jan 2002 Location: Woodbridge, VA / Va Beach, VA Posts: 462 Car 1: 95 M3 iTrader: (0)	ok test the egr if it's working. If you have a vacuum pump, then just disconnect the vacuum hose to the the egr and apply vacuum to the diaphram (egr). The engine speed should stumble or it could even die. This is a good sign showing that the egr is working. Now if the idle speed remains the same, it could be that the passages are clogged with carbon (which it could possible be). Clean it out. Note: If you don't have a vacuum pump, use your fingers to squeeze the diaphram from underneath. Note: Have you checked your pcv valve? __________________ http://img.photobucket.com/albums/v3...8/oaktree3.jpg 95 M3<>3.46LSD<> 00 SUZUKI GSX-R 750<>TOO MUCH TO LIST<>

08-24-03, 09:19 PM	#4 (permalink)
dap0901 Follow Me Join Date: Apr 2002 Location: Atlanta, GA Posts: 1,289 Car 1: 1991 Charcoal Sedan L iTrader: (0)	Same happened to me... I failed emissions three times in a row. I had my catalytic converter replaced, PCV valve, EGR valve, and oil change. I failed the No x ppm on the 50/15 test. After my mechanic did all of the above plus other misc. stuff it passed. __________________ In God We Trust!

08-24-03, 11:57 PM	#6 (permalink)
sleeprlegendcp Registered User Join Date: Jan 2002 Location: . Posts: 10,099 Car 1: . iTrader: (0)	I just found the EGR Valve Assembely on a web site. It shows $161.63 retail and $129.30 their cost. Is this in the right price range? Later! Lee __________________ National Acura Legend Meet 2008 - 4th of July - Chattanooga, TN - Click Here!

08-26-03, 04:04 PM	#7 (permalink)
LeoLegendATL S K / L L Z Join Date: Jan 2002 Location: Marietta, GA Posts: 1,153 Car 1: 91 LS coupe (boost coming soon! (or not)) iTrader: (0)	You don't need to replace the whole thing, it is probably clogged, just take it apart and clean it out. __________________ Peace, Legendary Legendz CC LegendaryLegendz.com http://images.snapfish.com/342%3A%3B...449%3A53ot1lsi INSPIRATION

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08-26-03, 07:00 PM	#8 (permalink)
Reno5658 E*koden Join Date: Jan 2002 Location: Woodbridge, VA / Va Beach, VA Posts: 462 Car 1: 95 M3 iTrader: (0)	sleeprlegendcp: Just follow what i told you to do. This will determine whether or not your EGR valve/passage is clogged. Just to let you know, i had my emissions done today. Pass with flying colors 15MPH Limit/Reading HC: 96/25 CO: 0.53/0.01 NO: 733/489 25MPH Limit/Reading HC: 93/50 CO: 0.52/0.04 NO: 664/489 __________________ http://img.photobucket.com/albums/v3...8/oaktree3.jpg 95 M3<>3.46LSD<> 00 SUZUKI GSX-R 750<>TOO MUCH TO LIST<>

08-26-03, 07:51 PM	#9 (permalink)
LEGENDmadnez Form Add** Join Date: Jan 2002 Location: SanLuisObispo Posts: 65 Car 1: White 91 L Coupe iTrader: (0)	I failed mine too...my check engine light was on and my egr was clogged. my mechanic knew of that and wat he did was he put a big big a$$ shop fan and let it blow in the front and did the test and I passed. try that for a quick pass and fix other things later

12-06-06, 10:01 PM	#10 (permalink)
gator_shawn Registered User Join Date: May 2006 Location: Canton, GA Posts: 31 Car 1: 95 Acura Legend L iTrader: (0)	Emissions Time for Me My Acura legend 95 failed emissions. It had miniscule numbers vs. allowable on all tests but NOx where it was like 965 with 780 allowable. Based on the limited data I can find on the net, this suggests maybe a clogged EGR valve. Does that sound right? Is this something I can remedy with a spray cleaner? Do I have to physically remove the EGR valve ass'y? Where is it?

12-06-06, 10:15 PM	#11 (permalink)
*LegendGS* GS Hog Join Date: Jan 2002 Location: SoCal Posts: 6,862 Car 1: 1994 Legend GS-Auto Car 2: 1994 Legend GS-6 spd Car 3: 1993 NSX-6 spd iTrader: (2)	There's a DIY for the EGR posted here. The method that I used successfully is documented here. __________________ Please read the Forum Rules and other announcements

12-08-06, 06:38 AM	#12 (permalink)
LPB Registered User Join Date: Mar 2002 Location: Massachusetts Posts: 4,144 Car 1: 1992 Seattle Silver LS CPE Car 2: 2007 Toyota Corolla Car 3: 1981 Corvette iTrader: (2)	You can certainly test the EGR. Before "throwing an EGR" at the problem, you need to remove the EGR - Intake Manifold pipe and check for a blockage. It tends to carbon up at the pipe connection at the intake. It is a major PITA to get to as working space is extremely limited. __________________ Eyebrows KMS Strut Bar Enkei 16" J-Lips Wings West Spoiler w/LED Clear Corner Lens Clear Bumper Lens Clear Rear Side Markers Brembo X-Drilled/Slotted Stainless Braided Brake Hoses Focus 2500 Driving Lamps Gold Pkg

12-08-06, 01:50 PM	#13 (permalink)
94coupe LegendaryRL Join Date: Feb 2002 Location: Suwanee, GA Posts: 363 Car 1: 1994 LS Coupe Car 2: 2005 RL iTrader: (3)	I know how you feel. I just recently failed my emissions and I had to get my EGR cleaned to pass. __________________ 94 Legend Coupe H&R Springs and Koni Shocks Greddy SP Exhaust Bayou Stage II Addco Rear Sway Bar CAI by Thai

12-08-06, 01:56 PM	#14 (permalink)
whyteLegend Chicken & Dumplins Join Date: Oct 2005 Location: Upstate Posts: 2,721 iTrader: (14)	Same here I failed this year my Nox level was high ..So I removed and cleaned the EGR valve and the line it was blocked up with built up carbon .. after that I passed .. As LegendGS mention that DIY will help follow it .. __________________ Click for Deep Discounts http://4450488.shopwize.com FS/Trade: JDM KA7 Headlights & Door Switch, heated seat switch 91-95 Sedan fender,3.5 RL HEADS , INTAKE MANIFOLD & FUEL RAILS , http://www.acura-legend.com/vbulleti...htside-124468/ http://www.acura-legend.com/vbulleti...ad.php?t=95844 Last edited by whyteLegend : 12-22-06 at 04:54 PM.

12-22-06, 04:49 PM	#15 (permalink)
Mentok Registered User Join Date: Dec 2006 Location: San Jose, CA Posts: 1 Car 1: 93 Legend iTrader: (0)	Other possible causes for NOX failure? I too have failed NOX in California. I replaced the Cat, the EGR, cleand the EGR port, and replaced an O2 sensor. I use only 91 Octane fuel from 76 (pro-power) or Chevron (Techron). What other causes could there be for a NOX reading of over 1100ppm? The guy who performed the test suggested that it was possible that if I had a blown headgasket (I have) that the result of shaving the head and replacing the gasket would cause a smaller headspace and therefor greater compression. This greater compression he said, would cause a hotter burn. As I understand it, a hotter burn is what causes higher NOX. Have any of you heard of this? Has anyone who has blown a headgasket later passed the strict smog tests that California and other states require? Mentok 93 Legend

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