1995 Chevy Blazer 4 Wheel Drive mileage: 120,000. Engine won't crank after filling with gas a day or so later, checked fuel pump pressure and I have 58 psi on fuel pump. No codes found on computer, disconnect battery and reconnect and it will start back up. Have replaced ecm, egr valve, fuel filter, and all ignition parts. Do you have any suggestions?
You may have a fuel injector that is bad. Check the resistance of each injector. The alternator may be giving AC (alternating current) spikes into your electrical system. Try temporarily removing the belt from the alternator and see how the engine runs.