my 92 chevy died just like it ran out of gas. I immediatly notice that i can't hear the fuel pump running. so i checked with a test light and no power at tank. then i checked the relay and it is good. if i jump a test wire from the orange wire on the relay to the grey wire, i can hear the pump come on. but even with the jump wire on it will not start. if i pour some gas down the tbi it starts right up.other than the cpu what else keeps the fuel from the tbi?? again I've checked fuses and the relay, with the key on there is no pump noise, but if you put power to it it works.