Stainless Racing Headers

Stainless Racing Headers

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Whats wrong with my car?

I have a 2003 Buick Regal Gs with the following mods
SLP Headers
Resonator Delete
Flowmaster 40 series muffler w/ dual stainless tips
EGR Delete
EVAP Delete
3.4" Supercharger Pulley (intense-racing)
Powdercoated Braces/Mounts/Blower casing/struts
Autolite 104 spark plugs
MSD Plug wires
Poly solid motor mounts
Shortened dog-bone mounts
Lower intake/valve cover gaskets
Custom tuned Powertrain control module
it has the 3800 supercharger engine.

Because of the exhaust there is no catalytic converter in it. The check engine light came on once and it need a new o2 sensor, then it came on again and was retuned now it just came on again. could it be that its pollutiing to much and thats throwing the light on? and how can i fix it. if its not that what do you think it is and how do i fix it

The O2 sensors are supposed to take the reading from the first one and the reading from the second one. If they're the same, when you have no cat or a bad cat, the light will come on. You can fix it by putting a test pipe in so you can install the cat when its inspection time or there's some type of software that will keep the light off by passing over the O2 readings, but telling the computer the test ran. I'm not sure where to get the software, but I've seen it used on a highly modified Sentra SE-R Spec V that had a straight pipe and no cats or O2 sensors, but no light either. Ran the inspection and it passed, I was shocked.