stupid emissions

desertcox05

New Member

Oct 3, 2007

379

0

0

south atlanta

Feb 29, 2008

#1

• Feb 29, 2008

• #1

just failed Georgia emission tests for the 2nd time. high Nox. Does anybody know what causes it to fail. 95GT, 5.0, 5 speed, stock motor, timing 10 degrees, bbk headers, bbk catted h-pipe, stock muffs, air pump and egr still in place. help please

 

94-302-vert

Active Member

Aug 16, 2004

1,947

2

36

NE CT

Feb 29, 2008

#2

• Feb 29, 2008

• #2

Could be timing or EGR... Run some Guaranteed to Pass and pull the spout and you should pass...

Do a search for my emissions nightmare and this is how I passed...

 

94CobraPace

Founding Member

Aug 30, 2000

907

1

0

Houston, Tx.

Feb 29, 2008

#3

• Feb 29, 2008

• #3

Run the car before taking the car there to get the cats hot, but don't let them idle the car and get the temp way up (what they did with mine). Next time back I pulled the spout, drove it for a bit, then did not let them let the car sit and idle, pass with ease.

 

desertcox05

New Member

Oct 3, 2007

379

0

0

south atlanta

Feb 29, 2008

#4

• Feb 29, 2008

• #4

i didn't know you could drive the car with the spout removed. I will do just that
thanks for the help

 

Car Nut

Founding Member

Jul 6, 2000

1,176

1

37

Snellville, Georgia (Atlanta area)

Feb 29, 2008

#5

• Feb 29, 2008

• #5

I've always passed easily and my mods are similar, minus the headers. Stock headers on mine.

Clean the MAF, I guess. Maybe 02s are going bad? Failing cats will cause problems for sure.

If you keep your stang maintained really good, all should go well.

Good luck and let us know what worked.

 

desertcox05

New Member

Oct 3, 2007

379

0

0

south atlanta

Mar 4, 2008

#6

• Mar 4, 2008

• #6

well I finially took it back to get tested again. reset timing to 10 deg. btdc and pulled the spout. this time passed with flying colors. everything lowered by about 50% most noticeable was NOxwhich went from 900 and1400 to 160 and145 respectively. outstanding!!!!!! But it did drive like garbage bogged really bad and wouldn't run over 4000 rpm but hey it passed and all is right in my world. THANKS TO ALL WHO REPLIED

 

Venom351R

Founding Member

Apr 27, 2002

4,548

41

98

MAINE

Mar 4, 2008

#7

• Mar 4, 2008

• #7

94CobraPace said:

Run the car before taking the car there to get the cats hot, but don't let them idle the car and get the temp way up (what they did with mine). Next time back I pulled the spout, drove it for a bit, then did not let them let the car sit and idle, pass with ease.

Click to expand...

how can you make them not get in the car and let it idle? We dont have emissions here luckily. Do have inspections so cats are required....unless you know who to go to.

 

desertcox05

New Member

Oct 3, 2007

379

0

0

south atlanta

Mar 4, 2008

#8

• Mar 4, 2008

• #8

the funny thing about cats. i have a toyota pick up and the cat has been drilled out but to the inspector it looks as if one is there and it has still passed emissions for 5 years now

 

Car Nut

Founding Member

Jul 6, 2000

1,176

1

37

Snellville, Georgia (Atlanta area)

Mar 4, 2008

#9

• Mar 4, 2008

• #9

With the spout disconnected, does the car idle rough or do anything different / strange compared to normal during the emissions test?

I know they let it run for a little bit at 1500 rpm or so and also around 2000 to 2500 rpm or so, as those are shown on the report. Nothing unusual sounding with the spout pulled?

 

S

saleener94

Member

Apr 24, 2006

153

1

17

Compton,CA

Mar 4, 2008

#10

• Mar 4, 2008

• #10

You should plug up to a code reader. Maybe something is about to go bad or something is not right. Even if there is no CEL you could still get codes. Mine was running lean and I got 2 codes even with no CEL. Fixed it by cleaning MAF with MAF cleaner. Passed right away.

 

9

95five-oh

New Member

Jun 25, 2006

158

0

0

Mount Airy, MD

Mar 4, 2008

#11

• Mar 4, 2008

• #11

try some guaranteed-to-pass or sea foam. I failed last year for the same thing as you also w/ aftermarket cats, ran a bottle of GTP through it, passed with flying colors.

 

desertcox05

New Member

Oct 3, 2007

379

0

0

south atlanta

Mar 6, 2008

#12

• Mar 6, 2008

• #12

with the spout disconnected the car idled just fine the only prob came was at @4000rpm the car started missing or cutting out. the tester doesn't need to rev it the high only to about 2500rpm max. it was just a pain to drive to the shop since i have 4:10 gears. when you put the spout back in be careful not to drop it in the fender ask me how i know