JMarietta3

I have a 2013 F-150 with 5.0 that had been haveing long cranks to start I read that a bad battery will do that so I have been putting off looking into the issue but this afternoon I went to start the truck and it would only crank I found where there is an issue with fuse #27 for the fuel pump and my fuse looks perfect so that is definitely not the issue I tried jumping it to see if it needed extra voltage that didn’t help it just cranked faster I also gave it a little starting fluid and it would not even hiccup but there were a couple times where it did seem like a couple cylinders fired while cranking so needless to say I’m at a loss where to look next the only thing I haven’t tried that I want to is to see if I’m getting spark I just ran out of patience working in the dark and cold for today thanks in advance for any help

FLXLT

Have you hooked it up to a scanner to see if there are any codes present? That'd be the first thing to do.

There is also a fuel pump relay, in addition to fuse 27. Your manual has the number of the relay, in the same box as fuse 27. Also try to take another 10a fuse and swap with 27 just to make ensure it's not the fuse.

There is no Schrader valve on the fuel rail so checking fuel pressure is difficult without a special adapter. You could disconnect the fuel hose from the rail and have someone hold it away from the truck, turn key to the run position for a few seconds and see if it spews gas out. If no fuel, fuel pump fuse/relay, fuel pump driver module above the spare, or possible bad fuel pump.

Also could be a bad crank sensor, this 'should' throw a code but would help explain the long cranking. Also wouldn't completely rule out a cam sensor either.

Olotti76

I just had this with my truck and it was the park/shift sensor that went bad. So first thing is check when u pt the truck in park does the P highlight or is it stay white, also after you shut he truck off and lock it does the dash cluster illuminate? This is why happened to mine and they ie ford replaced other wire harness's before I'd seen the dash illuminated one night on a whim and sure enough I've had my truck a week now and no issues. Biggest thing for me was battery dead in the morning with power everywhere else then I saw the dash illuminated after I'd locked the truck with the key fab no did some research and there's threads here with trucks of ours with that issue and the park sensor was the prob. Hope that's all it is and hope this helps a little.

fordman31

hello, check fuses for fuel pump so with a voltage meter with the key on check for 12v at fuel pump harness if 12 is present then repalce fuel pump also ford having problem with fuse at battery junction box.