JasonVT

iTrader: (3)

I purchased a car sight unseen on the word of the owner there were no issues, only mods were catback, lid throttle body and wheels.
well, 20 miles into driving it the SES light comes on. I stopped at auto zone and had them read it. P0420 and P0430 - both are related to the O2 sensors... which I found out are not there since there are no cats, I guess it also has the Bassani ORY that the owner failed to mention.
My question is what all do I need to have everything legal again? Im hoping to find a stock WS6 exhaust from the manifold back. If I can, what do I do about the O2 sensors? Should the wire and everything still be on the car?

If I cant find a stock exhaust, can I get Miidas or someone to install 2 cats?
If so, same question - how do I get the O2 sensors to work and read correctly?
Thanks

Tainted

iTrader: (9)

keep the cats off and just have your pcm tuned and delete the rear 02's

formula001

iTrader: (1)

You can keep the cats off and delete the codes or you can just buy some high flow cats and have them installed.

JasonVT

iTrader: (3)

Anyone near Charlotte have LS1 Edit and can delete the codes?
Is there any other way to delete them thats not mail order? I cant go without a car...

Kalgorn

iTrader: (6)

What do you mean by "legal"?

Do you need to pass emissions? If so, you're definately going to need cats. I'm not sure it's possible to pass without them... I doubt it.

formula001

iTrader: (1)

He will pass as long as there is no sniffer or visual test with the codes deleted.

Tainted

iTrader: (9)

you can pass w/o them easy. a mail roder tune gives no downtime either. they send you a tuned pcm, then you send them your stock pcm. its done on an exchange basis

JasonVT

iTrader: (3)

yeah, i need it to pass emissions.
id rather get a stock ws6 exhasut put on it anyway... but it needs to be inspected and emission tested within 10 days.

snake charmer

iTrader: (118)

i would just find a friend that has software or do a mail tune which should only cost around $100 to delete the codes . do a search for mail tune .

formula001

iTrader: (1)

Just go to a sponsor if you have any around you they will set you straight and delete the codes you can try that first, it is cheap, see if you pass or not, then you can put the stock stuff back on if you have too.

Tainted

iTrader: (9)

i reccomend pcmforless...

snake charmer

iTrader: (118)

your car should pass emissions if you have light mods . i seen cammed ls1s pass .

ErikElvis

iTrader: (1)

That sucks you need the sniffer. Without the cats it may be hard to pass. Run some of that guaranteed to pass stuff in the gas (dont really know if it works) And wring that sucker out a few times on the highway. Do they not plug in the OBDII there?

Fast Toys Performance Parts

iTrader: (3)

If they do a tailpipe test and you do not have catalytic converters, it would be almost impossible to pass. Catalytic converters convert harmful emissions into CO2 and water (not harmful).

xBROKEx

iTrader: (7)

if tuned properly an LS1 can easily pass a sniffer test without cats

Fast Toys Performance Parts

iTrader: (3)

Theoretically, a perfectly tuned engine that was 100 % efficient would only produce water and C02 (perfect combustion). Unfortunately, "most" engines are not 100 % efficient and do not achieve perfect combustion. That leaves CO, Nitrogen Oxides and Hydrocarbons in the exhaust. A catalytic converter works to clean up these dirty byproducts of combustion and convert them to Nitrogen, Carbon Dioxide and Water. A sniffer test measures all these byproducts and determines whether they are at acceptable levels. Without a catalytic converter in place, theoretically you could pass but your chances of sucess are greatly reduced. Since no engine manufacturer has yet made a prefectly efficient engine that achieves perfect combusion, all vehicles are required to use catalytic converters.

JasonVT

iTrader: (3)

update. it failed. had to get 2 cats welded in. most expensive inspection ever...
i did it then instead of trying to find some one here because if it doesnt pass within 10 days of registering it in NC they fine me $250. figured i should go ahead and do it.