Emission Testing
Thread Starter
Instructor
Joined: Jul 2002
Posts: 216
Likes: 0
From: Iowa Colony TX
Emission Testing
Geting ready to start emission testing here. For 96 and up they will just hook up to your OBDII connector and transmitt to Austin. Can they tell if you have the O2 simulators in place without looking?
Ron
Ron
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Emission Testing (his touch)
MrNuke, for the same reason "they" can tell us to wear seat belts, etc; because we gave "them" the power and don't want the responisbility that comes with freedom. :rant:
his touch, since (I believe) the sim doesn't cycle between .1mV and .9mV, like a real O2 sensor, I should think it would show up on a scanner as bad O2 sensors. If you had scans before/after would could be sure though. Even a scan now would tell you how the sims look to the scanner; perhaps they are "smarter" than I would think.
his touch, since (I believe) the sim doesn't cycle between .1mV and .9mV, like a real O2 sensor, I should think it would show up on a scanner as bad O2 sensors. If you had scans before/after would could be sure though. Even a scan now would tell you how the sims look to the scanner; perhaps they are "smarter" than I would think.
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: Emission Testing (65Z01)
Kinda wish they would scan 'em here. Just fixed a kid's Camaro which went for 6 retests failing them all. A simple scan showed the O2 was disconnected (previous owner thought it would run faster in open loop) and had pulled the check engine bulb.
Le Mans Master
Joined: Apr 2000
Posts: 6,341
Likes: 1
From: Shelton CT
Re: Emission Testing (65Z01)
Yea but a seatbelt will actually save a life... Hooking a freakin scantool to the car would inhibit from modifying it wouldn't it?? I mean for emissions testing that seems a bit absurd. (Thank god for my OBDI old-school ecm) harharhar..
[Modified by MrNuke, 1:12 PM 4/24/2003]
[Modified by MrNuke, 1:12 PM 4/24/2003]
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Re: Emission Testing (MrNuke)
I'm guessing, but aren't they just looking for codes & that the PCM is in working order? How many smog techs really know what all the #'s mean - say a block learn of 156 vs 128 - on the thousands of different makes they test & would it make a bit of difference in what's coming out of the tailpipe? Maybe it's in the software - Mitchell certainly provides it to the Dealers for troubleshooting - but I don't know of any State that has taken it that far or if the GREENIES who push for this stuff even know what's in a data stream.
Burning Brakes
Joined: Feb 2000
Posts: 927
Likes: 0
From: Saginaw TX
Re: Emission Testing (MrNuke)
The alternative, if you have pre OBDII is having them put it on the 'dyno' and run it up. I'll take the plug in anyday. Word is if the car gets away from them and runs off the dyno, it's YOUR fault. Figure that one out. What I understand about the test is that the ODBII is smart enough to figure out if something is not right and will set a code, no codes and a 'WORKING' check engine light should pass. This is what I have been led to believe. They just hooked up and did not probe the exhaust on my 2K Grand Prix.
Melting Slicks
Joined: Mar 2002
Posts: 2,526
Likes: 0
From: Truth And Reconciliation
Re: Emission Testing (his touch)
It may depend on the emission station you take it to as well. On my '96 Bronco, the check engine light has been on for like 2 years...the data unit that detect error codes has a broken wire or something. The thing still runs fine and passes emissions no problem. I have had two or three stations tell me they won't pass it if the check engine light is on, though, regardless of what the actual problem is.
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Thread Starter
Instructor
Joined: Jul 2002
Posts: 216
Likes: 0
From: Iowa Colony TX
Re: Emission Testing (mash557)
From what I have been told, when they hook it up ti the computer, the information goes directly to Austin. The computer there determines if you pass or fail. I don't know if the run the engine or what. If the engine is not running, it cannot see the O2 sensors cycling.
Ron
Ron