I have a 2010 f150 5.4L if I let it sit for a day or so it’ll crank but won’t start unless im pressing on the gas pedal and then when it does start it may run rough and cut off and does the same or sometimes it’ll run rough and then even out it happens every morning and when I leave work but after it finally cranks and runs It runs fine unless it sits for a long period of time I can hear the fuel pump priming and the fuse 27 looks good it has melted before I swapped the pump relay with a know good one still does the same cleaned the MAF and throttle body it does have a code for bank 1&2 running rich none of my wires look broken or corroded need some help ASAP please

 

first off..punctuation is your friend

second thing. your truck is telling you something. BOTH banks are running rich, what steps have you taken in diagnosing why it is telling you that?

it could be a failing injector but do not just throw parts at it

 

Well when I was cranking it the other morning and got it to crank I could smell gas, I figured it was from pressing on the gas pedal to crank it. But then I let it sit a idle and walked over to the exhaust and could still smell gas, so then I hooked my scan tool up to the port and I got a P0172 (bank 1 system too rich) and P0175 (bank 2 system too rich) I’m not really sure what to check for it running rich

 

these modern vehicles have something called clear flood mode.

you put the pedal sometimes halfway/ all the way to the floor while cranking and the truck will shut off the injectors

 

Okay ima have to try that, if that works will that mean my injectors are going out

 

not necessarily.

it might be a good time to step back and find a good shop to take the truck too

 

That would be nice but right now it’s my only ride to and from work I’ve seen on here people having similar problems and the things they found on there’s looks to be working on mine like that fuse 27

 

In that case you're going to have to live with it. The only way that truck is going to get fixed is in the hands of a competent technician with the tools and know how to diag it properly.
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Well thanks a lot

 

It is what it is. Your engine is computer controlled, it takes another specific computer to find out why it's not running right. No two ways about it. Rent a car for a few days if you have to, borrow a car, ride the bus, what ever you can but that truck needs to hit the shop.
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