The ign control module is in the air cleaner and is calle the "lean burn system". Your unit is 20 years old and probably needs replacement if you car is running poorly. Do some research on the lean burn system and you will find that it was an over complicated electronic ignition. Mopar has a electric ignition replacemen kit to bypass the LBS. This is an option to replacing the lean burn computer available at NAPA for about $135.00. The replacement is easy fix (about 4 screws and 2 plugs) and will fix your ignition problems, but if you plan on driving the car for a length of time get the conversion kit ($200.00).