ok so i was driving to work and the truck died on me like twice and both times re-fired up..( 99 f150 5.4) .then started driving again and it finally died for good it wouldnt fire afterwords just cranked and cranked tried shooting starting fluid in it and it fired really quick but then shut off obviously lol brought it home and starting looking at it and i can hear the pump buzz but still no fire i figured i can check to see if i had pressure from the scharider valve and barely anything came out. turned the key off and had my brother try to see if it would fire and when the key came on fuel came out.. nothing like shooting out but more like a overflowing faucet seems weird to me...... i need to figure put what i can fix or replace on this to get it to fire again... i was thinking maybe the regulator first or the pump or maybe both i know there should be about 28lbs of pressure coming from it minimum... any help is greatly appreciated fuel filter is maybe 1100 miles old maybe

 

Borrow a fuel pressure gauge from a parts store.

 

Change the fuel filter first! After removing it, try to blow thur it?? clogged i'll bet.

 

well i got a fuel filter this morning and swapped it out with the old one, fortunately it was clean and was able to blow through it.. it wasn't but 1500 miles on a new one but figured it was the cheapest route to go. well that's ruled out now and yet im still getting fuel coming up through the scharder valve when i turn the key on, its not a huge geyser but its more like something is blocking the path so it exits at the valve... it this point im guessing its the regulator.... considering there's no pressure at the valve to even test it you can see there's no pressure. so im thinking of replacing the regulator now and seeing what happens... anyone ever replaced a regulator before?? would removing the intake make it easier??

 

You need 40 psi for the fuel injectors to work. If your not getting 40 psi the most likely culprit is the pump.

 

Even if there's fuel coming from the pump I hear a buzz just changed the regulator and still nothing

 

Well the theft light is flashing now

 

PATS issue. Try the other key.

 

The truck only has one key and it has no key flob just the one key so if I lock it its done manually and to unlock it's key in the door as well

 

Either the chip in the key has gone bad or the transceiver in the steering column has gone bad - or a wiring issue.

 

Ok as for the wiring issue what are some things I can look for to double check to make sure they're ok... ??thank you for everyone that's replying. This truck is gonna drive me up the wall lol. ... what's something like that if the transmitter is bad cost to fix im sure it's not a swap out and it's gonna be programmed ...also the cup in the key what's something like that usually run abouts so I can have a idea

 

If the key is bad, you are going to have to get a tow to a dealer, they can cut a new key which has to be programmed to your truck. That runs around 85 bucks plus the tow. The truck came with 2 programmed keys.

It's not a transmitter, it's a transceiver. It's in the steering column, it's a collar around the ignition cylinder that communicates with the key.

 

What's this little button I hear about. .I'm being told there's a small button I can press to reset it or something is this true?

 

No not the PATS. There is a reset button for fuel safety cutoff that is located behind the passenger kick panel.

 

I know about that that's the inertia switch for the fuel I'm talking about for the security