i failed emissions
TECH Fanatic
Joined: Oct 2006
Posts: 1,003
Likes: 3
From: Champaign/Chicagoland
Well what have you done?
Start with a good complete tune-up and take it from there... if you have a friend or know a HS with an auto shop might be a good idea to check emissions there to see if there is any improvement.
Start with a good complete tune-up and take it from there... if you have a friend or know a HS with an auto shop might be a good idea to check emissions there to see if there is any improvement.
TECH Fanatic
Joined: Oct 2006
Posts: 1,003
Likes: 3
From: Champaign/Chicagoland
What area(s) did you fail?
As far as a "friendly" shop -- bad idea, IMO....since if the one you happen to try to tip is not friendly, I believe there are some sort of penalties/etc...
As far as a "friendly" shop -- bad idea, IMO....since if the one you happen to try to tip is not friendly, I believe there are some sort of penalties/etc...
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
if I had to guess, I would say bad cat will give you high nox values, it did for me, I put a new cat and cleaned the egr and it passed, as for the hc I have no clue, good luck
Last edited by 94 F-body; May 18, 2007 at 02:56 PM. Reason: forgot something
New cat. And if that doesn't fix it, dump 1 gallon of denatured alcohol in the tank, fill up the rest with premium. I can neither confirm nor deny that this will bring your HC levels down to almost nothing. 
Do you have codes? (Edit) I guess not since you were inspected.
Change your oil, change thermo if colder one, put in cleaner burning fuel.
Change your oil, change thermo if colder one, put in cleaner burning fuel.
Last edited by 97LT1; May 18, 2007 at 03:56 PM.
man tha car is bone stock and i got my sticker to but still tell me what to do.
And to 94fbody i think its a bad cat to hmmmm wonder if this would be a great excuse for a new catback exhaust lol
And to 94fbody i think its a bad cat to hmmmm wonder if this would be a great excuse for a new catback exhaust lol
high hc and high nox will indicate you are running lean. high hc and high co indicates rich. the twc cat will take care of all those but the egr helps more with the nox. ive heard alcohol does wonders.
Originally Posted by That_guy
man tha car is bone stock and i got my sticker to but still tell me what to do.
And to 94fbody i think its a bad cat to hmmmm wonder if this would be a great excuse for a new catback exhaust lol
And to 94fbody i think its a bad cat to hmmmm wonder if this would be a great excuse for a new catback exhaust lol
