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Discussion Starter · #1 ·
Sounds like you need a new air/smog pump, a new catalytic converter(because its gone or is clogged), a new O2 sensor, and possibly a new MAP or TPS sensor(these are just a possibility). 90% of your rough engine performance issues will stem from faulty emission components. The IAC/ISC motor will cause stalling and rough idle because it is also an emissions component. If you are missing any emission component for the false sake of more power out of the engine then reinstall or replace the appropriate emissions components. A smog engine will only run correctly with smog components, otherwise a crate motor may serve better.
 
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