Runs 3 mins--dies--hard to start
1990 5.0 7UP, been sitting over a year. Replaced fuel pump and fresh fuel, fires up when cold, runs 3-5 mins, starts stumbling and dies,fuel pump reland and WOT relays clicking, rapidly, NEW TFI, then found dead EEC relay...replaced. Same Problem. WON'T pull codes. Is the STO supposed to have batt voltage when key is off?? Goes off when turn on Key. Ran wiring harness, found no problems, have voltages at EEC per info I can find. Even opened up EEC looking for bad capacitors. Didn't look like any leakage, although board looks like overheated on section where you would add a piggyback. Have spark at plugs and 35psi when problem happens. Seems to be all electrical problem..........anyone have any ideas?? Been running on this for over a month!!!