I failed emmisions today
I failed emmisions today So I know not everyone is from Colorado but you guys may still have similar standards. Colorado is very strict on emissions. I brought my 2001 Pontiac Trans Am in with only 47,000 miles on it. these are the test results. If you have any expirience or input please let me know.
These are what the guy said could be wrong
[/quote]
It has
SLP lid to K&N filter, SLP MAS, SLP headers to aftermarket cats to SLP loudmouth exhaust, I have the tune in it and it is stock beyond that.
I know I am not in need of a tune up. I did go to stock tune and the programmer showed
OBD II P0102 (Mass air flow sensor circuit, low input)
I looked everything over and it seems okay.
These are what the guy said could be wrong
[/quote]It has
SLP lid to K&N filter, SLP MAS, SLP headers to aftermarket cats to SLP loudmouth exhaust, I have the tune in it and it is stock beyond that.
I know I am not in need of a tune up. I did go to stock tune and the programmer showed
OBD II P0102 (Mass air flow sensor circuit, low input)
I looked everything over and it seems okay.
So did you perform the test with the stock PCM tune? If so, then it would definitely fail due to a rich idle condition caused by the headers.
Also, I see that you failed the "Check Engine" light section as well...was that the faulty MAF sensor? You'll need to get that replaced before you can get the tune sorted out.
What sort of PCM tune is it? Based on your ability to return to the stock tune, it sounds like it's a handheld programmer or something...that won't cut it for passing emissions. You need a custom tune with the headers.
Are the AIR and EGR systems working properly? They are largely responsible for the hydrocarbon and NOX readings.
Also, I see that you failed the "Check Engine" light section as well...was that the faulty MAF sensor? You'll need to get that replaced before you can get the tune sorted out.
What sort of PCM tune is it? Based on your ability to return to the stock tune, it sounds like it's a handheld programmer or something...that won't cut it for passing emissions. You need a custom tune with the headers.
Are the AIR and EGR systems working properly? They are largely responsible for the hydrocarbon and NOX readings.
The 2001 doesnt have an EGR system anymore. The tune was a Hypertech Max hand held, I removed the tune and put my buddies stock MAS on. Im headin in now to see if this works.
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Staging Lane
Joined: Oct 2008
Posts: 68
Likes: 0
From: Modesto CA
Sorry to hear that man idk what to say after u took that last test but to go on back and leave the car the way it is and fix the code that was reading above P0102 because on the paper ur cat is good but all in all it is ur check engine light that was the past but on the last paper it also reads NOx GPM Fail and HC GPM fail anybody else knows what that means because i definetly dont know im learning something new about my F body everyday lol
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Verdad Gallardo Sorry to hear that man idk what to say after u took that last test but to go on back and leave the car the way it is and fix the code that was reading above P0102 because on the paper ur cat is good but all in all it is ur check engine light that was the past but on the last paper it also reads NOx GPM Fail and HC GPM fail anybody else knows what that means because i definetly dont know im learning something new about my F body everyday lol
I was told in Colorado where it says Catylitic Converter pass, all that means is they saw one under the car. So the Cat might be bad but my computer doesnt show any codes for it. I dunno
12 Second Club
Joined: Apr 2002
Posts: 680
Likes: 0
From: Cave Creek, AZ- Canada Also.
I can't remember what my numbers were when I had similar setup. Turned out that the cats were not heating up enough to burn the gases. I went to shorties and stock cats and got zeros aross the board. My ss was actually cleaner burning than my altima lol.
Bet its your cats.
Bet its your cats.
12 Second Club
Joined: Apr 2002
Posts: 680
Likes: 0
From: Cave Creek, AZ- Canada Also.
actually I found the old fail readings.
HC ppm 124 55 limit
CO% .51 .31 limit
NO ppm 621 408 limit
New readings
HC ppm 0
CO% 0
NO ppm 17
I would pass at idle but fail at when driven at speed.
The cats could not keep up and burn the gasses.
HC ppm 124 55 limit
CO% .51 .31 limit
NO ppm 621 408 limit
New readings
HC ppm 0
CO% 0
NO ppm 17
I would pass at idle but fail at when driven at speed.
The cats could not keep up and burn the gasses.
You failed on three accounts.
The first is the NOx problem, which is due to your EGR delete: http://en.wikipedia.org/wiki/Exhaust_gas_recirculation If I recall my chemistry correctly, your altitude will only add to the problem at idle. Put the EGR back, its your friend, will get you passed the emissions, and will make the air cleaner by the time I have to breathe it in Chicago!
The second and third is your HC and the check engine light. Fixing your MAF should correct both of these. (HC is due to poor combustion. The MAF is a key component of the fuel/air calculations that your PCM makes when controlling fuel going in to the engine.)
Your MAF problem could be due to your K&N Air filter. It could have shed oil on to the MAF http://www.obd-codes.com/p0102 and fouled it. The cheap and easy fix is to buy some MAF cleaner (you must use the special MAF stuff or a non-residue electrical contact cleaner) and try cleaning it off. Once you do that, you'll need to erase the P0102 code from your PCM and make sure it doesn't throw the code again. (I had this problem and went back to paper filters - life has been much better since.)
The first is the NOx problem, which is due to your EGR delete: http://en.wikipedia.org/wiki/Exhaust_gas_recirculation If I recall my chemistry correctly, your altitude will only add to the problem at idle. Put the EGR back, its your friend, will get you passed the emissions, and will make the air cleaner by the time I have to breathe it in Chicago!
The second and third is your HC and the check engine light. Fixing your MAF should correct both of these. (HC is due to poor combustion. The MAF is a key component of the fuel/air calculations that your PCM makes when controlling fuel going in to the engine.)
Your MAF problem could be due to your K&N Air filter. It could have shed oil on to the MAF http://www.obd-codes.com/p0102 and fouled it. The cheap and easy fix is to buy some MAF cleaner (you must use the special MAF stuff or a non-residue electrical contact cleaner) and try cleaning it off. Once you do that, you'll need to erase the P0102 code from your PCM and make sure it doesn't throw the code again. (I had this problem and went back to paper filters - life has been much better since.)
12 Second Club
Joined: Apr 2002
Posts: 680
Likes: 0
From: Cave Creek, AZ- Canada Also.
The way I see it. You are stock on your settings. Stock maf.
You have SLP L/T with aftermarket cats.
If you are not properly tuned for L/T's the car will run rich. mine did I could smell it was rich.
cats are not doing their job. simple.
I can remember the exhaust coming out of the pipes not being very hot. Now that Im basically back to stock (shorties) the exhast coming from the pipes is so freakin hot I can't put my hand anywhere near it for more the 5 sec.
You have SLP L/T with aftermarket cats.
If you are not properly tuned for L/T's the car will run rich. mine did I could smell it was rich.
cats are not doing their job. simple.
I can remember the exhaust coming out of the pipes not being very hot. Now that Im basically back to stock (shorties) the exhast coming from the pipes is so freakin hot I can't put my hand anywhere near it for more the 5 sec.