Swing by dons shop. He will look at it. It could throw a code for one sensor and another one(upstream o2) is just fouled. And without proper tools and the knowledge to use them. You will throw good parts at it to not fix the problem. Causing more downtime and money.
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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