Before you mess with anything related to the idle, just turn the idle screw down until it is at the right rpm and see how it runs. Unless you know what you are doing you can screw up other things by adjusting the wrong things. Keep it simple to start and eliminate the possiblity that the PO liked having a high idle.
Do you have a FSM? If not do a search here for a free download link. Get it and READ it like it is your favorite comic book.( Get the fuel injection bible too at the same link) When you are done read it again, then work on your car.
Without the knowledge this is a recipe for another car that will never run right and a year from now you will be several thousand dollars poorer from throwing parts at a problems instead of knowing what and how to fix the car properly.
Do you have a FSM? If not do a search here for a free download link. Get it and READ it like it is your favorite comic book.( Get the fuel injection bible too at the same link) When you are done read it again, then work on your car.
Without the knowledge this is a recipe for another car that will never run right and a year from now you will be several thousand dollars poorer from throwing parts at a problems instead of knowing what and how to fix the car properly.