Engine will only turn on after multiple attempts. What might be the problem?

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! If your 2013 Ford Flex needs multiple attempts to start, the issue might lie in the fuel system, ignition system, or even a crankshaft position sensor. Since you've already replaced the fuel pump module, check the fuel pressure to confirm it's consistent. If not, it could still be a failing fuel pump or clogged injectors. If the fuel system checks out, consider looking at the ignition switch, starter relay, or even the key fob/transponder system. A weak crank sensor can also cause this kind of intermittent starting trouble by confusing the ECU. Don’t ignore it—intermittent problems tend to get worse and can leave you stranded. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.