help no spark!
hey guys/gals. first post please dont beat me up to bad. sorry this might get long. friend of mine has a 1992 wrangler 4cyl,2.5 5 speed. problem? no spark. new crank position sensor,new distributor parts (cap,rotor,cam position sensor,wires,plugs),checked ignition switch,good. coil (green wire)only gets power for approximately 5-10 seconds when key is first turned on, yellow wire has continuity w/ground. when fuel pump turns/kicks off power goes out.i dont want to just change random parts. please help.