Failed Emissions Test
Thread Starter
Senior Member
Joined: Jan 2000
Posts: 634
Likes: 0
From: Essex, Ontario, Canada
Failed Emissions Test
Well I went for my rest today and failed miserably. 
The HC and CO were extremely high. The NO was passed. The guy doing the test seemed to think it was running rich. I'm thinking of just putting on a new high flow cat and trying again.
Any suggestions?
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350 TPI, 700R4(rebuilt), K&N's, MSD 6AL, Headers, Flowmaster, 160* stat, airfoil, MAF screens cut out. 13.88 @ 101.18 mph
The HC and CO were extremely high. The NO was passed. The guy doing the test seemed to think it was running rich. I'm thinking of just putting on a new high flow cat and trying again.Any suggestions?
------------------
350 TPI, 700R4(rebuilt), K&N's, MSD 6AL, Headers, Flowmaster, 160* stat, airfoil, MAF screens cut out. 13.88 @ 101.18 mph
Supreme Member
Joined: Dec 1999
Posts: 1,237
Likes: 1
From: Reno, NV
Car: yep
Engine: uhuh
Transmission: sure does
Losing the 160 stat would help.....how does it run?
Got a bigger cam in it??
A new cat will eat some up, but it depends on how high is "extremely high"
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ASE Mechanic/Machinist/Smog Tech
1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...
R.I.P. #3
"He can see air"
Got a bigger cam in it??
A new cat will eat some up, but it depends on how high is "extremely high"
------------------
ASE Mechanic/Machinist/Smog Tech
1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R
and 2 POS commuters...
R.I.P. #3
"He can see air"
Thread Starter
Senior Member
Joined: Jan 2000
Posts: 634
Likes: 0
From: Essex, Ontario, Canada
It runs good, however I do have 23# injectors in it now. It still has the stock heads and cam. For the longest time it seems that I had a leaking injector which would make it smell extremely rich when started. This went on for a long time until I finally put new ones in. Could this have degraded the convertor over time?
Maybe I'll lower FP a bit and throw in a new convertor. Any recomendations on what brand?
Oh and here are the #'s on my test: HC limit ppm 68--my reading 128, CO% limit 0.38--my reading 1.62, NO ppm limit 751--my reading 656. At least I passed one part of it.
------------------
350 TPI, 700R4(rebuilt), K&N's, MSD 6AL, Headers, Flowmaster, 160* stat, airfoil, MAF screens cut out. 13.88 @ 101.18 mph
Maybe I'll lower FP a bit and throw in a new convertor. Any recomendations on what brand?
Oh and here are the #'s on my test: HC limit ppm 68--my reading 128, CO% limit 0.38--my reading 1.62, NO ppm limit 751--my reading 656. At least I passed one part of it.
------------------
350 TPI, 700R4(rebuilt), K&N's, MSD 6AL, Headers, Flowmaster, 160* stat, airfoil, MAF screens cut out. 13.88 @ 101.18 mph
Member
Joined: Mar 2000
Posts: 138
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From: North Vancouver, BC, Canada
Engineboy, perthaps you could be of some assistance to me.
Today I whipped my T/A through our "AirCare", it passed easily on both HC and NO, (very low readings), but on the CO side, it reg'd 1.33% where as you are only allowed 1.34%, this is on the driving component of the test where they bring it up to 30mph. Close, huh?
The catalytic converter is brand new.. oh, and SO IS THE ENGINE.
355ci, CompXE262 (218/224,.460.470"), stock 882 heads, flattops (~8.8CR), Performer intake, stock QJet. Oh, no EGR. They don't pop your hood or enforce any visuals here on pre-86 cars, you just have to pass the sniffer.
Could this be because it only has 300miles on it, and needs to get worked in a little more? EGR woes? Cam too aggressive for the smog *****?
BTW: I just pulled my first full-throttle run, I couldn't wait any longer <evil grin>. With those 3.73's it really hauls *** . =)
Later,
Hype.
Today I whipped my T/A through our "AirCare", it passed easily on both HC and NO, (very low readings), but on the CO side, it reg'd 1.33% where as you are only allowed 1.34%, this is on the driving component of the test where they bring it up to 30mph. Close, huh?
The catalytic converter is brand new.. oh, and SO IS THE ENGINE.
355ci, CompXE262 (218/224,.460.470"), stock 882 heads, flattops (~8.8CR), Performer intake, stock QJet. Oh, no EGR. They don't pop your hood or enforce any visuals here on pre-86 cars, you just have to pass the sniffer.
Could this be because it only has 300miles on it, and needs to get worked in a little more? EGR woes? Cam too aggressive for the smog *****?
BTW: I just pulled my first full-throttle run, I couldn't wait any longer <evil grin>. With those 3.73's it really hauls *** . =)
Later,
Hype.
Junior Member
Joined: Jul 1999
Posts: 6
Likes: 0
From: Silver Spring, MD USA
Hi Folks,
I had the same problem and replaced my CATS and the HC & CO fell like a rock. I purchased Random Cats for my car. I had them installed and went back with my for the third test. To my shock, I passed the emission test. My number went from 1.9262 to .2630 HC (limits 1.2 GPM) and CO that was over 20 on the second test went to 12.5936 (limits 20.0GPM). I have a 350 TPI, LT-4 Hot Cam, 1.6 RR, 24 lbs injector, Elbrock ported heads, Runners, ported base, etc. It is not stock but I passed with the new CATS. If you think you need new CAT, do it - you need to spend some money for a waiver anyway. I hope this helps
I had the same problem and replaced my CATS and the HC & CO fell like a rock. I purchased Random Cats for my car. I had them installed and went back with my for the third test. To my shock, I passed the emission test. My number went from 1.9262 to .2630 HC (limits 1.2 GPM) and CO that was over 20 on the second test went to 12.5936 (limits 20.0GPM). I have a 350 TPI, LT-4 Hot Cam, 1.6 RR, 24 lbs injector, Elbrock ported heads, Runners, ported base, etc. It is not stock but I passed with the new CATS. If you think you need new CAT, do it - you need to spend some money for a waiver anyway. I hope this helps
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