It is very hard to get out, and they are hard to find for the older trucks. It is a box connected directly on top of the under dash fuse box. I have read that a front windshield leak causes the GEM module to short out if at any time you have things that come on and off without you turning them on.

Check the throttle position sensor and make sure it's functioning properly.Įngine control module (ECM): The engine control module (ECM) could be the issue if it's not providing the proper signals to the engine components. Throttle position sensor: A faulty throttle position sensor can cause the engine to stall when you try to drive. Check the MAF sensor and make sure it's functioning properly. Mass Air Flow (MAF) sensor: A malfunctioning MAF sensor can cause the engine to run poorly or stall. Clean or replace the injectors if needed. It could be stuck open and causing the engine to stall.įuel injectors: Clogged or dirty fuel injectors can cause issues with the engine running properly. Check the fuel pump relay and make sure it's functioning properly.įuel pressure regulator: If the fuel pressure is good, the next step is to check the fuel pressure regulator.

Here are some possible causes:įuel pump relay: The fuel pump relay could be the issue if the pump is not getting power. There could be several reasons why your 2006 Ford F-150 won't start even though you've replaced the starter, fuel pump, driver fuel module, and starter relay.

2005 expedition fuel pump relay problem