Emission Failed>>>>

97GTSTANG

Founding Member

May 25, 2000

852

0

17

Virginia

Jul 21, 2004

#1

• Jul 21, 2004

• #1

Just did Emissions today and I FAILED>...

HC ppm Limit is 76 reading is 56 PASS

CO% Limit is 0.42 Reading is 0.17 PASS

NO ppm Limit is 605 Reading is 1163 FAIL


So what could be the problem? The guy doing the emission said it can either be the O2 Sensors, EGR valve or the Cats.

Please help

Thanks

Sig below.

 

R

rhamm1320

New Member

May 26, 2004

3

0

0

Jul 21, 2004

#2

• Jul 21, 2004

• #2

Some tricks are:

Make sure your car is up to full operating temperature. Use high grade Fuel. A tune up can work wonders (plugs and wires if needed). Make sure your timing is not set too far advanced - the lower the timing, the lower the emissions (sounds strange, but its seems to work). A fresh oil change helps too. Also, if the readings are taken at idle and not a dyno, set your idle speed up as high as possible without going over the limit.

Good luck!

Ron

Engine Dyno

 

StangFreak32

New Member

Jul 16, 2004

75

0

0

Baton Rouge, La

Jul 22, 2004

#3

• Jul 22, 2004

• #3

solution: move to a redneck state like me where they never test emmisions

 

dkshadow

Banned

May 12, 2003

952

0

0

TEXAS

Jul 22, 2004

#4

• Jul 22, 2004

• #4

Today I put my car on a 4 gas analyzer just for the hell of it...


HP: 330 ppm went down to 260ppm after letting it idle for 2 mins..
02: .06
CO: 4.6
CO2: 11.56

Yep... the carbed cars were burnin the fuel better than my damn 03 was.... thank you Prochamber

 

97GTSTANG

Founding Member

May 25, 2000

852

0

17

Virginia

Jul 22, 2004

#5

• Jul 22, 2004

• #5

Whats a 4 gas analyzer?
what does it do?

 

B

bdcardinal

tree hugger

Jun 10, 2003

3,612

16

69

santa barbara, CA

Jul 22, 2004

#6

• Jul 22, 2004

• #6

a 4 gas analyzer reads hydrocarbons(HC) o2, co2 and co. its a type of smog machine. they are being phased out in CA and are being replaced with 5 gas analyzers which also read nitrides of oxygen NOx.

 

GTvert01

New Member

Nov 24, 2003

636

0

0

West Plains, MO

Jul 22, 2004

#7

• Jul 22, 2004

• #7

Good thing we don't test emissions here, I bet my o/r x-pipe would probably throw up a few red flags.

 

Ryan02Stang

Active Member

Jun 17, 2003

1,181

0

36

Arlington Heights, Illinois

Jul 22, 2004

#8

• Jul 22, 2004

• #8

Bassani cats are a joke. They are probably burnt out. Mine burnt out after 5 months so I just got an offroad pipe. Just find a stock H pipe on for emissions.

 

G

GoneIn11

New Member

Jun 15, 2004

16

0

0

Jul 22, 2004

#9

• Jul 22, 2004

• #9

I had the same problem and the tech giving my car the emissions test (after I had failed twice) told me to rev the engine to 2500 rpms for 30 seconds right before it is tested... I did it just before it was my turn in line and it worked like a charm... but it was not on a cobra, but I bet it would work for you too.

 

HuskerCobra96

Founding Member

Jul 31, 2001

741

0

0

Overland Park, KS

Jul 22, 2004

#10

• Jul 22, 2004

• #10

it's the bassani cats. Trust me on this one...

 

B

Black2K1

New Member

May 7, 2003

88

0

0

Raleigh, NC

Jul 22, 2004

#11

• Jul 22, 2004

• #11

I just recently passed emissions with my prochamber. I did not think it was going to pass, but the shop never looked under the car. I was just glad that I did not have to swap out the pipe for the stock one again.

 

97GTSTANG

Founding Member

May 25, 2000

852

0

17

Virginia

Jul 23, 2004

#12

• Jul 23, 2004

• #12

Well is there a way for me to change the bassani x cats by just cutting the old cats on the bassani and replace them with new ones?

 

B

bdcardinal

tree hugger

Jun 10, 2003

3,612

16

69

santa barbara, CA

Jul 23, 2004

#13

• Jul 23, 2004

• #13

why not just get a stock h pipe and put that on for the time being. that way you will pass smog for sure.

 

97GTSTANG

Founding Member

May 25, 2000

852

0

17

Virginia

Jul 23, 2004

#14

• Jul 23, 2004

• #14

I am not sure if the stock h still work. I have kept it in the garage for over 3 years.

 

H

huesmann

Founding Member

Jun 21, 2002

332

0

16

Jul 23, 2004

#15

• Jul 23, 2004

• #15

Why wouldn't it still work if it's been sitting? Unless you jammed it full of ***** while it was leaning against the wall.

 

97GTSTANG

Founding Member

May 25, 2000

852

0

17

Virginia

Jul 23, 2004

#16

• Jul 23, 2004

• #16

I will get my tools out and see if i can put it on this weekend. What do u all think causes the NOx ppm to be soo much higher. Limit is 605, my reading was 1163, thats almost twice the limit
is it because the car is running too lean or too rich?

 

mrvax

Stay thirsty my friends

Founding Member

Nov 29, 1999

5,225

3

79

SN Moderator: Orlando, Fl.

Jul 23, 2004

#17

• Jul 23, 2004

• #17

huesmann said:

Why wouldn't it still work if it's been sitting? Unless you jammed it full of ***** while it was leaning against the wall.

Click to expand...

True. Drive it around for a few days to let the car adjust to it then re-take the test. Have a clean air filter.

 

97GTSTANG

Founding Member

May 25, 2000

852

0

17

Virginia

Jul 23, 2004

#18

• Jul 23, 2004

• #18

so with the high Nox ppm number is caused by the car leaning out? isnt that bad for the car? will a chip fix the problem?

 

cobra_fanatic

New Member

May 13, 2003

7

0

0

Missouri

Jul 24, 2004

#19

• Jul 24, 2004

• #19

I'm going to have to agree with StangFreak32. Move to a nice redneck state like Missouri. I just had my 96 cobra inspected a week ago with my new forged engine and mac long tubes with an off-road H-pipe and no mufflers. The freakin ground was shaking and the guy never even looked under the car. Sometimes it's nice to live in the middle of no where.

 

trinity_gt

10 Year Member

Jan 31, 2003

3,125

81

99

Canada

Jul 24, 2004

#20

• Jul 24, 2004

• #20

Make sure the EGR system is working properly (it's the primary emission control system charged with reducing oxides of nitrogen) and that the ignition timing is set to the factory value for the test.