LT1-LT4 Modifications 1993-97 Gen II Small Block V8

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Old 12-16-2009, 03:52 PM
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So I had vince tune my car went through emissions and it failed because there was nothing coming from the o2 sensors is there anyway I can pass emissions without cats? I was under the impression that as long as there is no check engine light you were golden
Old 12-16-2009, 04:04 PM
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was the light unplugged or tuned out
Old 12-16-2009, 04:05 PM
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if they weren't tuned out you will still throw a code

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Old 12-16-2009, 04:13 PM
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Originally Posted by shutzero
So I had vince tune my car went through emissions and it failed because there was nothing coming from the o2 sensors is there anyway I can pass emissions without cats? I was under the impression that as long as there is no check engine light you were golden
My car passed as it sits. LPPs, No cats with bullets dumped and a nasty lopin cam.
Old 12-16-2009, 04:16 PM
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Its def tuned out cuz I threw a misfire code a while back after he tuned it out...i think he just turned the o2s off cuz there was no reading during the test...maybe its cuz I had it done at firestone?
Old 12-16-2009, 04:20 PM
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yea always take it to a mom and pops place, they are less aggressive
Old 12-16-2009, 04:30 PM
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Damn wasted 20 bucks
Old 12-16-2009, 04:33 PM
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Only $20 DAMN its like $45- $50 here Yep the mom and pop shops dont normally check under the car for cats and things like that
Old 12-16-2009, 04:34 PM
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NJ inspection is free. Suckers!

Old 12-16-2009, 04:40 PM
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Bitch ! !!!!!!! !!! Lol
Old 12-16-2009, 04:41 PM
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fl has no inspections hahaha
Old 12-16-2009, 04:41 PM
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The thing is though they didn't even mention the cats...just the o2s not giving any signal
Old 12-16-2009, 05:04 PM
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Originally Posted by TheDon619
fl has no inspections hahaha
I know my brother lives in Gainsville, I was going to buy a camaro from him but he deleted all emissions
Old 12-16-2009, 05:06 PM
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i thought they only checked for codes but im not sure, i have a 94 so they put mine on the sniffer and dyno
Old 12-16-2009, 05:52 PM
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sucks to be you guys......anything 95 and older doesn't get tested in IL anymore and if you do it's a scanner test, so in stead of deleting the rear o2 sensors, you just put sims in and it solves the problem. As long as the 'puter thinks there are cats, then the emissions guys think there are too......even with huge cams
Old 12-16-2009, 06:10 PM
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Where do I get these sims
Old 12-16-2009, 06:19 PM
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any of the big speed shops should have them
Old 12-16-2009, 06:19 PM
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speed inc., thunder racing, summit, jegs, etc. look for o2 sensor simulators most commonly from casper electronics. they might cost ya $50.
Old 12-16-2009, 06:22 PM
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sorry $100 for the pair

o2 sims here
Old 12-16-2009, 09:06 PM
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In CT if all but 2 monitors are set it passes 96-2000.One monitor not set 2001-DATE. It makes no difference where you took the car the test is the same. Is the ses light working on the dash? Does the ecm have a stored code or pending code. If not how did the test station know the tuner tuned out the rear O2 sensors. TOM FALCO CT certified emission inspector. CT is a visual emission state. If the cats are gone you get a fail. Some testers dont look and some do. The inspector is not required to test data output of sensors. If he did that he is in violation of the law. But he can fail you on visual check NO CATS. By the way why would you remove cats ??? They dont reduce HP. In some cases it increases HP. TOM

Last edited by tom falco; 12-16-2009 at 09:11 PM.


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