Make sure the fuel pressure regulator is getting good vacuum:
- http://www.4crawler.com/4x4/CheapTricks/22RE_Engine_Pix/8.html

AFM controls the fuel pump:
- http://www.4crawler.com/4x4/CheapTricks/AFM/index.shtml

Unless you install the fuel pump test jumper:
- http://www.4crawler.com/4x4/CheapTricks/index.shtml#FuelPump