changed filter,new gas,new plugs,new cap,injeckter cleaner,new oil stills runs like it has a plug missing smells bad when running .
Get the engine computer trouble codes read. This is usually a free service at most auto supply stores. You may have a bad O2 sensor or other issue.
You would have trouble finding someone to read the trouble codes since that is a OBD1 computer in there. What kind of smell? Oil? I would start by checking the compression of the engine.
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