I have a 1993 ford bronco XLT with a 5.8l 351w. It would not start on its own. In most fuel cases you can spray starting fluid in the throttle body and it will run for a few seconds BUT!!! if you use starting fluid and it would continue to run that means your injectors are not opening "Priming". If your hear your fuel pump run more than a few seconds or won't stop with the key in the run position its mostly likely a bad computer! I replaced this and it fixed my problem!!!