I think the advance will change fuel settings. The throttle body gets dirty like a carburetor.
http://www.rockauto.com/ sells a rebuild kit and a fuel pump pressure regulator for these throttle bodies. Sometimes the injectors get dirty.
http://www.alldatadiy.com/ get a years subscription they have wiring diagrams.
http://www.ebay.com/itm/302437817808/www.ebay.com/
Pull the distributor cap and place engine on TDC or zero degrees use white out and mark rotor and side of distributor, rotate engine about 90 degrees counter clockwise. Then rotate clockwise to mark on distributor if you have over 10 degrees difference you need a new two piece timing chain. They use a fibre gear and they wear.
Use a can of starting fluid when the idle changes sprat some in the throttle body to make the mixture more rich if it runs fine you either have an intake leak or a partially plugged injector or a dirty throttle body. Follow Tech 11 guidance to find leaking intake or vacuum leaks. Using a carb,will probably require a new harness and ECU for carb,or a distributor with a vacuum advance and coil built in.