2008 f150 engine replacement issues

Switch is bad but it should not keep it from starting up. Check all connectors specially the ones by firewall on passenger side to make sure they're fully plugged in and if they are, start by narrowing down the problem by spraying some Ethel or some flammable spray in the throttle body to see if it runs for a bit, if it does, u have a fuel problem if it doesn't, check voltage to ignition coils

Someone told me the switch can get out of position when going bad. Will allow it to turn over but not crank?? Will start with the switch and move from there. Really tight at the firewall for checking connections. Thanks!!

On my 2010 4.6 the EVAP solenoid went bad. When I would fill up then try to start the vehicle, the ignition would stay in the start position without starting and had to be manually pulled back. Engine would also occasionally kill while driving. When solenoid was replaced it worked fine. Also had to reflash the PCM. Seems there were three updates since new the dealer failed to install.

check and recheck all of the ground wires from the engine to the chassis, there is a small one on the rear of the motor that will keep the engine from starting, happened to me until i found the wire.