Fuel pump location of a 1990 Geo Tracker?

If the engine in question is the carbureted engine, then the fuel puymp is located on the cylinder head, according to my Chilto's book. The joib doesn't look too hard to do, remove thew neg batt cable, remove the fuel cap ( to relieve back pressure ) , tag and remove the hoses then remove the fuel pump and old gasket. If you need to see if the pump is operating, have someone with you and when you have the pump off, have your helper crank the engine and see if fuel is coming from the pump, if is is, then look elsewhere. If fuel isn't coming out of the pump then a replacement is in order.