have a 01 f250 superduty v-10 drove around today came home shut it off sat for 3 hours went to leave would crank over fine no fire. Thought maybe a fuse looked at distribution box checked number 5 fuse fuel pump relay coil. was good no start pulled number 20 ignition switch number 21 ignition switch both good put 20 back in heard a click under hood put 21 back fired right off omly drove it a couple miles after all seemed fine. Anyone have any thoughts anything to worry about have a 500 mile trip in a couple weeks dont need problems. Thanks for the help.

 

I hate to say it but my guess would be the fuel pump about to make its last appearance...

 

^^^^^^^agree......mine tricked me into a new battery before the pump died permanently

 

The fuel pump fuse did not make it start I put it back in and tried several times would not start when I pulled number 20 and 21 and put back in thays when I heard the click and then started.

 

Fuel pump for sure.

 

Could be a lot of things, truthfully it could be very frustrating to figure out.

I had a friend call for help a few months back, his truck quit on him. He had been having some problems with it dying, but it would start back up after a while. Sometimes right away, other times after sitting a bit. Finally it didn't start so he had it towed in, the shop put a new fuel pump on and it ran fine. Drove it away but the next day it died again, so he had it towed in again and again they put another fuel pump on. The next day it died on him again and he called me. No fuel, so I pulled him to my shop and since the pump had been changed twice already, I installed a new fuel pump relay, it ran fine for two weeks, but after a couple weeks passed it started dieing again.

This time the problem didn't fix itself after sitting for a while and allowed me to do some testing. I got a wiring diagram from a service manual and performed some tests. I kept tracing the problem back from the fuel pump through several interconnected circuits, I finally found a point that I had power.

The problem was a bad connection inside a 30 amp fuse under the dash. I tested, had no power, pulled the fuse to look at it then reinstalled it and suddenly I had power everywhere again and the truck fired right up.

Upon further examination of the fuse I decided to replace it because one of the spades on the fuse seemed to be a tiny bit loose. I took a wood chisel and split the plastic cover off of the fuse and the fuse fell apart in two pieces. The center section was not burned out but it did have a hairline crack in it allowing it to lose connection. I split another new 30 amp fuse apart and decided there was just no way I had broke the first one, a 30 amp fuse is pretty robust even without the plastic shell on it.

This problem was ongoing for several weeks, the truck quit on him countless times leaving him stranded and needing towed. He had a reputable shop work on it and fail. He spent probably a thousand dollars over a fuse that cost less than a buck. Thankfully his truck has ran perfectly for several months now. Not saying this is your problem, but these problems are often just not so cut and dried.

 

thanks iamrfixit last night after I put fuse 20 ignition back in and it started i decided to check fuses for corrision today not real dirty but decided to clean them and see what happens still working fine. anyother thoughts greatly appreciated.

 

still having a ocassional no start this morning was cold -14 air temp have been able to cycle key when it has not started and usually will fire not this am. picked up a fuel pressure tester hooked it up turned key have almost 40 lbs fired right up. holds a steady 30 lbs at idle shut it off drops to around 27 lbs but holds that pressure. still have gauge connected might leave it on while using truck then if it will not fire can check pressure right away. does that sound close to normal for pressures? not sure if it's the pump or not any thoughts thanks.

 

Have you tested the battery? A bad/weak battery can make these trucks do some crazy things.

 

thanks fordxfour it seemed to crank a little slow on cold mornings so took and had battery load tested showed it was needing replacing was only 2 years old will try it and see if it takes care of my issues still have pressure gauge on truck but of course it hasnt done it since put gauge on go figure. thanks