My 99 f350 v10 wont start. starts fine for a couple of days then out of the blue it just wont start. replaced filter, throttle control nothing any help

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The fuel pressure sounds too low. Is it multi-port injection? Check the fuel pressure against your specs for the car and engine. MPFI systems usually require 40-50 psi.

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You have a fuel injection system on your vehicle. pumping the pedal doesn't do any thing except open the throttle until the engine starts. If you have not replaced the fuel filter for a long time, replace it. this will not fix your problem, but it will help. Your problem sounds like the check valve in the fuel tank sending unit is letting you fuel drain back to the tank. this is why it takes time to start the engine. It is not a part that you can buy by itself, part of the unit. costly to replace. what you can do to make sure this is the problem, is when it sets a few days and your sure it will take time to start, try turning the key on wait a couple of seconds turn it off then back on. do this 2,3,4 times. what this does is pressure up the system and the truck should start alot faster. remember replace the fuel filter as this may be clogging up. It will give you the pressure you need , but not the flow of fuel. Plus it saves on wear and tear of the fuel pump.

FUEL PUMP MIGHT STILL WORK,BUT IT MIGHT NOT BUILD UP ENOUGH FUEL PRESSURE.ALSO COULD BE M A S,,,MASS AIR FLOW SENSOR,CHECK IT CLEAN IT,OR REPLACE IT..YOUR THROTTLE POSISTIONING SENSOR ALSO.IF IT MOVED OR FAULTY CAR NO GO.I HAD IT,REPLACED AWAY I WENT...OTHER SIMPLE IS FUEL FILTER

there is no speedo fuse . if it was a fuse the whole cluster would not be working . i think speed sensor with is on the trans . you should have a shop check this befor you start replacing parts

have put a new fuel regulator on this truck if you done everything else try that

Check the fusible link that feeds the starter solinoid, the remote starter by passes it.

better check fuel pres and volume, id bet fuel filter or pump

spark plugs known problem when cold