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Originally Posted by turtle
Seems to me that when you bypass cats and fool around with the exhaust in a big way you'd better disable something(cancelling the code effectively eliminates the sensor) or you'll be driving around with the check engine light on, and god knows what happening from the ECU to compensate for the readings on the exhaust sensors. So it's not an unusual thing.
If an industry leader has such a solution I am all for it.
But for every person that reports good gains from indusrtry leaders, there is another that doesn;t get squat, often listing the same mods. As I read through the archives, it's been beaten to death on these boards, with seemingly more folks not getting gains.
And while I understand we are talking about two different cars, I have seen the same issues before - and not from "laptop tuners". I would like to avoid that is all.
Anyways, I will hopefully hear from GIAC themselves shortly.
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Yes, disabling the knock sensor is a great way to keep a CEL from coming on, which is why most hack programmers will do it. Proper programming eliminates the need to disable the knock sensor and will optimize the maps in the ECU to keep the CEL from coming on...properly. Don't get me wrong, I am not a programmer, but we work closely with GIAC on our tuning (our boxster supercharger kits are tuned through GIAC, in fact we will be tuning the 3.2 kit hopefully this week), and I know what you can expect from people who know how to properly tune engines, and what to expect from people that don't. We just went through a huge battle with EIP on a VW turbo kit, and after seeing their "tuning" and "ecu chip soldering" abilities, I am leary of a lot of lower level tuners.