Supercharger Do's and Dont's

[AlexDIBwhippled]

Saw your car at Rev, I have the DIB with the Whipple on it. You have custom Maryland tags right ?

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[Jeff_oddo]

I'm going to rant here........

If you get an aftermarket tune/upgrade then buyer beware since it might not pass emissions (I'm talking about OBDII check only). Everyone will tell you passing emissions is all in the tune. I asked in a thread if anyone with "tuner stuff" passed emissions. Nobody responded. If you call the tuners, they will never make any guarantees and most cannot tell you it will pass or not. I failed emissions with just a tune an intake before. When contacting the tuner, they said that shouldn't have happened but couldn't do anything for me. Do a Google search and you will find others that had the same problem.

What I have come to understand is that the ECU has readiness monitors. These monitors need to be on and able to run diagnostic tests on the emissions stuff. The monitors do far more than just a simple check to see if the o2 sensors are on. When you get a tune, the testing procedures completed by the monitors no longer work correctly. This makes the car fail emissions testing for not being ready. Can't pass emissions, can't drive the car on the street.

Furthermore, some aftermarket tuners will tell you they don't mess with the emissions stuff, or that if you still have the cats you are all set. If they are touching the tune, they are effecting rediness monitors and therefore emissions stuff.

All the above has been a real disappointment to me since there is so much awesome tuner stuff out there.

Ok, I'm done now :-).

As long as the Check Engine Light isn't on, it will pass here in NC. They still scan the OBD II port, but you need to ensure you drive the car the proper amount of drive cycles before getting it checked for emissions.