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

Emissions

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Old 01-08-2007, 01:01 AM
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I finally installed a set of lt's on my 93 Vette, along with a b&B exhaust. Problem is now i have no 02 sensors and no pre cats and the rear cat has been pounded out so what do i do for emissions? is it going to pass......
Old 01-08-2007, 05:49 AM
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no O2's? WTF? assuming your serious.... hell no it wont pass emissions. Removing changing or modifying Catalytic converters, EVAP, AIR, EGR, O2's, even certain unapproved headers in almost anyway will fail you on a visual inspection.

Now, if your only talking about the sniffer part, I'm not sure how the vettes exhaust is run (are there two sets of cats? if so, why?) but, camaros with the LT4/LT1 only had one set of cats and you usually will not pass if you remove them.

Then there's the codes for not having O2's... you'll need sims or to tune them out. SES light for emissions equipment will fail you.
Old 01-08-2007, 06:51 PM
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I'd be surprised if it even made it to the inspection booth without o2's. You need them to just run the car correctly.
Old 01-08-2007, 06:55 PM
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Yea, the O2's help with the Air/Fuel mix.
What Headers did you use on the Vette, they are interesing on them C4's..



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