So I have a2014 F150 with the 5.0 engine about 130,000 miles odometer. I've been getting engine light with code showing random misfire. Came to the idea this was due to bad fuel pump.
I've replaced plugs, coils, throttle body, MAF sensor, O2 sensors. All recent, so I ordered a cheapy fuel pump from parts geek about a month ago. And a few days ago I decided to lower fuel tank, and replace fuel pump. Put all connections on and strapped back in. Crank no start now, maybe first two or three time ran for split second. So decided was running with old pump, so lowered and installed old pump. Same problem, so call mobile mechanic for help. He checked connections and had me crank engine. When he plugs starter back in during cranking the engine starts for 4 or 5 seconds. So decided it was bad connector as I had broke old connector wrestling it off. So I wired fresh connector on and same problem, cranks no start. Anyone have similar experience, and what was fix?

 

So update I can start engine cold by flooring gas peddle briefly when cold. Been doing this like last four days. But seems to be engine
is running more and more rough over this four days. Along with new message Service Advancetrac popping up today. This truck is
the opposite of Christine which fixed itself. This truck wrecks itself and my wallet.

 

You got to begin with the basics and start looking at fuel pressure and a new fuel filter if it is old.. It amazes me how much work you have done and you wasted your time with a cheap, low quality fuel pump.

Exactly what codes are present? Pull the plugs to see what they look like? By flooring it, tells me the engine wants more air. Maybe its flooding out? The plugs will tell you.

 

The last part I would want to go cheap on would be the fuel pump. Geez...

 

Yeah well, lowest price for motorcraft extended range fuel tank pump is like $290. This is from an online Ford oem parts supplier.
And yes I came to learn that cheap fuel pump means will be doing again before long. But had the idea of quick fix on the
cheap. Also I've taken truck to autozone for code reads, can't recall codes. But has been random misfire past three to four times.
Also I will pull plug or two to see if looks unusual. Thanks guys

 

the parts cannon isn't cheap unless you just get lucky...

putting the pedal to the floor is flood clear mode - it turns off the injectors

you've already spent a bajillion dollars, I'd suggest either getting the connector to use forscan or take it someone who knows how to diagnose this truck properly.

 

ok well another update, the reason engine was running so rough and service advance track message. Was I had removed intake
to check if MAF sensor and throttle body were clean and wiped both off. And when I put back in place I left MAF sensor
connector off, I'm surprised it started and ran at all. Anyway I wanted to save face for F150 brand by admiting my mistake.