passing emissions test with LTs
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passing emissions test with LTs Ok so I ordered some Pacesetter LTs with egr and air fittings. Now I have a few questions regarding emissions I live in Ohio and my county has emissions... sucks 
Well im getting a catless y-pipe and I was figuring when I went to get my emissions test Ill just wield a cat on real quick for the visual test. Since when they test they just plug into your OBD-2 computer and scan it, can I just have my 2 rear 02 sensors removed via a tune and still pass the emissions test?
Well im getting a catless y-pipe and I was figuring when I went to get my emissions test Ill just wield a cat on real quick for the visual test. Since when they test they just plug into your OBD-2 computer and scan it, can I just have my 2 rear 02 sensors removed via a tune and still pass the emissions test?
My friend's SES light wasn't on, and he still failed. On his 97, for the OBD2 test, it all came up as "not ready" for the rear 02s. He is on this site, perhaps he'll chime in. Good luck.
-J
-J
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Originally Posted by 96blackz28
You think ill need sims vs just having the 2 sensors removed via a tune?
I got my EGR and A.I.R pump deleted from my car, and i still passed, and I also have a catless Y pipe, but i have o2 sims....
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Originally Posted by 96blackz28
You think ill need sims vs just having the 2 sensors removed via a tune?
Originally Posted by Gloveperson
didn't see you were getting a tune. If you delete the codes, no need for 02 sims from what I understand.
i can see how the code delete would make the SES light off, but i think the not ready condition would show up for the emissions test
unless someone can give me a diffinative answer, im going to try this: ORY and no slims with code delete, try the emissions, if i fail im going to buy the sims and retest, if i fail again, you will see a new thread on LS1tech
Originally Posted by LiquidFire350
im soo confused on this, so let me get this straight, if you have the O2 codes deleted you dont need sims, but wouldnt that make the computer read nothing from the rear o2s which would then cause a not ready condition
i can see how the code delete would make the SES light off, but i think the not ready condition would show up for the emissions test
unless someone can give me a diffinative answer, im going to try this: ORY and no slims with code delete, try the emissions, if i fail im going to buy the sims and retest, if i fail again, you will see a new thread on LS1tech
i can see how the code delete would make the SES light off, but i think the not ready condition would show up for the emissions test
unless someone can give me a diffinative answer, im going to try this: ORY and no slims with code delete, try the emissions, if i fail im going to buy the sims and retest, if i fail again, you will see a new thread on LS1tech
-J
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From: NJ
I'm the guy he's talking about...emissions suck.
Here's the deal (or what I've discovered so far).
I have long tubes w/o egr, air, etc, and I had O2 sims in place of rear O2s. When i went to pass inspection I came up with (i believe) 4 not readies. One for EGR, one for AIR, and 2 for each rear O2. I had EGR and AIR programmed out, and my O2s had the sims plugged in. I was throwin no SES lights, but still failed...twice. From what I understand, 98 and older vehicles are allowed to have 2 not readies. Being that you have EGR and AIR, and just have your rear O2's programmed out, I think you will be fine. 98 and up are allowed only one not ready. If you do throw a cat in, remember you MUST go through a GM OBD2 drive cycle, other wise your O@s will still come up as not ready.
Best of luck, I hope your results are better than mine.
PS- sims or having the rear O2's programmed out does not matter, they both end in the same result...a not ready. All a sim does is trick the computer, all a program does is force the comp to ignore it.
Here's the deal (or what I've discovered so far).
I have long tubes w/o egr, air, etc, and I had O2 sims in place of rear O2s. When i went to pass inspection I came up with (i believe) 4 not readies. One for EGR, one for AIR, and 2 for each rear O2. I had EGR and AIR programmed out, and my O2s had the sims plugged in. I was throwin no SES lights, but still failed...twice. From what I understand, 98 and older vehicles are allowed to have 2 not readies. Being that you have EGR and AIR, and just have your rear O2's programmed out, I think you will be fine. 98 and up are allowed only one not ready. If you do throw a cat in, remember you MUST go through a GM OBD2 drive cycle, other wise your O@s will still come up as not ready.
Best of luck, I hope your results are better than mine.
PS- sims or having the rear O2's programmed out does not matter, they both end in the same result...a not ready. All a sim does is trick the computer, all a program does is force the comp to ignore it.
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From: NJ
Originally Posted by FIREHAWK #07
hmm, I thought that if you had o2 sims OR have them deleted via a tune, you would pass; just like if you have the EGR deleted via a tune you will pass....
I got my EGR and A.I.R pump deleted from my car, and i still passed, and I also have a catless Y pipe, but i have o2 sims....
I got my EGR and A.I.R pump deleted from my car, and i still passed, and I also have a catless Y pipe, but i have o2 sims....
Its a 96, It has the EGR and AIR deleted via lt1edit & o2 sims; here is the actual inspection report: and notice it says "Not Ready" for the catalyst, not sure what exactly that is, I thought the cat was the "heated cat" not sure.
Last edited by FIREHAWK #07; Apr 25, 2005 at 03:48 PM.
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From: NJ
Originally Posted by FIREHAWK #07
Its a 96, It has the EGR and AIR deleted via lt1edit & o2 sims; here is the actual inspection report: and notice it says "Not Ready" for the catalyst, not sure what exactly that is, I thought the cat was the "heated cat" not sure.
that's very interesting...maybe i'll run mine through the drive cycle and give it another shot. Thanks for the input.
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hmm, well that tought me a lot more than I knew about emissions. Thx guys, hopefully I wont have too much of a problem, i still got a year till i need to test it anyway 
i have a friend that does inspections, and he said as long as the car doesnt have any codes showin, ur fine. they dont do visual anymore, its all done by computer. well at least thats how it is in pa.
laws vary state to state, but in TX, on a 96-97 it's not a sniff 02 test, just plug in to the PCM under the dash and visual for cats. You may find some not posting all their secrets because these sites are regularly surfed by various law enforcement of which in TX they are cracking down on state inspection facilities. Nothing a pm can't solve, most have ways to beat the system.
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So by looking at the emissions slip, it seems that deleting the egr did the trick ( says "ready" ) ? Also I think the one that says "2nd system", is actually the secondary air as they call it which is your AIR ( it also states ready ) ??
I also have N/A next to EVAP, why doesnt that one register as not ready or incomplete? From what I know, my evap system has no problems but reads N/A?????
I wish someone could find the magic answer with EDIT!
I also have N/A next to EVAP, why doesnt that one register as not ready or incomplete? From what I know, my evap system has no problems but reads N/A?????
I wish someone could find the magic answer with EDIT!
