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Curious if my 97 Mark VIII LSC is making the full 290 horsepower claimed from the factory. It has 150k w/ no problems. Check engine light is on because the cats were gutted by the previous owner (no burning egg smell or anything like that). Even when I clear the check engine light my car does...

Looking for some advice on my 97 Mark VIII LSC. it almost has 150k and just recently, it's been hesitating a bit at lower RPMs. Check engine light is on, and it spits out codes 0153, 0420, 0430, and 1151. After researching these it seems there is a problem with my cats, and possibly with the O2...