oxigen sensor lean condition

What is your question?

hard to start, then it hesitates in gear. i put a new oxygen sensor, and still hesitates i also put new fuel filter,air filter, map sensor, and i still have the same problem, please help on what to look for to fix it, am in a tight budget, thank you for your feed back

What makes this problem better or worse?

cold start

How long has your 1991 Chevrolet Caprice had this problem?

2 weeks