Correct me if I'm wrong, but won't the car be stuck in open loop / rich burn without a catalytic? Or did you install an 02 fooler?
I had to reset my 12V battery after changing my catalytic due to it running rich afterward (I didn't do an emissions delete...lean burn reasons).
Let us know how it does. Do you feel any more power accelerating?
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EDIT: My 1000th post on Ecomodder!!