I have a 2001 Ford expedition 5.4l. I recently got caught in a bad storm and drove my truck through a few inches of water. During my drive my truck started to run rough and the "service engine soon" light started to blink. Now my truck runs rough and when I'm at a stop the engine would give a pulse. Took it to orielys and autozone to check for codes and found no codes. After leaving, a few miles later the light came back but stayed solid. What could it be?
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