Try this test, turn the key on for 3 seconds, turn it off. Now try to start it. If it starts and runs without shutting off you have an issue with the fuel pump check valve. It's job is to retain fuel pressure in the system after you run the vehicle. When you first turn on the key it should prime the system with fuel. Then the engine starts and the ECM sees the rpm change and turns the pump back on. When the check valve fails the fuel all drains back out of the lines so you have an air locked system. The engine starts on the first amount of fuel, burns it off but then hits the air and shuts off. The next time you try to start it the system has now purged the air and the engine runs.
That check valve is in the fuel pump so the only way to repair this issue is to replace the pump. Or just turn the key twice and run it.
Thursday, February 1st, 2018 AT 8:09 AM