1989 Chevy Silverado V8 Four Wheel Drive Automatic 163000 miles
This truck has a 350 throttle body fuel injection system. The problem is that it will start without even touching the gas but, it only runs about 5 seconds and then shuts down. We have replaced the idle air oxgen sensor, fuel presure regulator and all the seals in the throttle body. It has a new starter, battery wires, alternator, ignition module, cap and rotor, plugs and wires. The fuel pump is working I just don't know what to do next !
Check the fuel pressure, the fuel pump might be coming on but is it producing the correct fuel pressure. Also have these things checked out-coolant temperature and throttle position sensors, idle air control valve/air bypass passage could be clogged up.