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I've done the plugs, wires, rotor button, injector cleaners. Still runs rough. no codes are triggered either. don't have a pressure tester. it is a steady rough making me think it may be a bad cylinder or bad timing. your thoughts? I'm baffled.
Check for a vacuum leak. Use a handheld propane torch, no flame, listening for changes in idle as you pass the open propane past a vacuum in take of fumes.