I know this probably has come up numerous times but I’m new to this. I have a 2003 montero sport that was running one day and the next day I get in to go to work and it starts then immediately dies. I’ve changed the fuel pump to no avail. It’s getting spark and will run on starting fluid. The fuel pump relays are clicking but will not stay running. Anybody have any idea what it could be. I was told that it could be the immobilizer causing the fuel to shut off. Thanks for reading and any input that I receive.