Compression Ignition Addict
Join Date: Dec 2007
Thanked 273 Times in 262 Posts
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OK, the SES light is a Check Engine (Ford says "Service Engine Soon") and there's not much that shouldn't set a light with what you're describing. So, first thing is, what are you using to scan the truck with? Because, our trucks cannot be scanned properly with a Generic OBD-II scanner (like the handhelds and Auto Parts Stores have).
I think 8-10 seconds is a reasonable amount to stop at, it should have started by then and, more than that I'd be worried too.
Next time it happens, what I'd want to do is to check for fuel in the fuel bowl. When it's evident it's doing this (say after the 2nd attempt) get a container and maybe a short hose. In fact, do it now to get a base line for what you should see.
Look above the pass ft tire, you'll see a 3/8" metal tube, against the motor that ends there, it's the drain for the bowl (yellow lever you slide to the side). Get a cup, open the lever, drain the fuel bowl, look at the fuel, close the lever. Then, turn the key to the ON position (should hear the pump) for 15 secs. Drain the fuel bowl again, whaddya got?
Fuel Delivery is one of the few things that won't set a light, and you could have a dieing pump or a cracked pick-up maybe...