Maybe try driving it around the block a few times and then check it. Keep it idling while you check. But if it has no power like you said it doesn't, chances are the cat is bad.
And if the cat is bad, change it out first before you change out the O2 sensors.
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93 GMC Typhoon: new money pit/PITA. Now GT3788R powered.
Boost, because sometimes atmospheric pressure just isn't enough.
"If it has tit's or tires, you can be pretty sure your going to have problems with them..."
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