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He has replaced the stock exhaust. That could actually disable lean burn somehow?
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The short answer is: I'm not completely sure, but if they pulled the catalytic converter off that car, then I'm pretty sure lean burn will not be functional. A lot of
those guys will pull the cat out and put on a "test pipe" to supposedly get a little more horsepower. I'm pretty sure not having a cat is illegal in every state, but if you don't have inspections you may never get caught, unless of course you move to a state that does.
Anyways, I think there are some sensors in the cat with the HX which tell it yes or no for lean burn. Can any of you HXperts comment?
HTH,
JMac