RE: First Chevy. S10 2.2 Question. Missing?
Another inexpensive investment would be to replace the fuel filter and the air filter while you're at it. I've had wierd problems in the past with catalytic converters going bad, as well. Any of the items on this thread so far could cause performance issues. Aside from the converter, they're all cheap and quick to fix. Most of them are probably needed anyway on a vehicle this age if they haven't already been done.
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