tford55805

Hello, I'm new here and hoping someone may be able to help with my intermittent crank no start issue. My rig is a 2010 F150, Crew Cab w 114k on it.
Approx once per week, truck will crank but wont start.
Only happens in the morning, often after a cool evening
If I try it again around noon, it usually starts.
Once it starts, it starts fine for the rest of the day - has never not started in the afternoon or evening
Once it starts, it runs perfect.
Have replaced the battery and ignition switch
I've taken it in multiple times but there are no error codes and of course it always starts while its at the shop so they can't do much.

Is there anything that I can test when it is starting/running? The biggest difficulty has been that the shop can't duplicate it and it always starts for them.

Any advice or input would be greatly appreciated.
Thanks!

santa06

Crank position sensor can do this type of issue with no codes, not an expensive part either.

On the cross frame rail above the spare tire is the fuel pump driver module.

Its all plastic so its doesn't corrode like in the past; but I just had to change mine for a no start issue recently.. After unplugging and replugging connector truck then started. I didn't trust the module so the $50 part was replaced. Haven't had an issue since. My truck has over 200k miles on it.

On the fuel rail is a schrader valve where fuel pressure can be measured; if you have a guage try measuring it when truck won't start.

Jon Wagner

Check the fuse for the fuel pump. My 2010 had starting problems and it turned out to be a bad fuse. It is located under the hood, I can't remember what number it is.

tford55805

Do you happen to know if the fuse is bad, will it still start occasionally? Or would it just not start ever?

santa06

If the fuse is gone it won't start. It feeds power to the fuel pump relay.

You could swap pump relay with another one in the fuse box.

When it's not starting you need to confirm if pump is running or not.

Fordjunkync

On my 09 I found a relay in the fuse/relay box under the hood was malfunctioning.

I dont recall off hand which relay it was but the engine would turn over but not start.
I kept swapping the relays out with one from a less important spot & the truck started.

My fusebox is right above the center of the radiator (not sure where yours is located) but the relay (off the top of my head) was near the center of the box.
I would have to go & look again to see if I can recall which 1 it was as it was a few years ago when it happened.

Greg Owen

This just happened to me yesterday. Did a search on this forum to see if it has been happening to others.

Started my truck in the morning, and moved it about 100 yards, then shut it off. About 5 minutes later, went to start it again and it just cranked and cranked.

Quick thinking/troubleshooting led me to the fuse box under the hood. Sure enough, fuel pump fuse was fried. BTW--it's in slot 27, 20 amp fuse. Replaced the fuse with a spare (always carrying spares, just in case!), and the truck started right up and ran fine for 200 miles all the way home.

So, question.... To me, this is a sign of something else going bad. Anyone else?

tford55805

Greg, I think our problems are possibly related, but not exactly the same. My truck would start most days, but some days it wouldn't. Regarding your fried fuse, when I took my truck into the dealer the last time, I was told that some F-150s are having issues with the fuel pump fuse over heating and actually melting. I believe there is now a bypass that moves that fuse out of the fuse box to prevent it from overheating.

Update on my crank no start: No parts have been replaced, but since my last visit to the dealer, it has been starting perfect. They took a few things apart to look at fuses and test fuel pressure, and I'm hoping that perhaps there was just a loose connection somewhere that was unknowingly tightened. Still frustrating not knowing what the problem was, but Knock On Wood, the truck has been starting fine for over a month now.

Greg Owen

Well, while out on errands this morning, I did stop by my local dealership. The TSB 15-0137 mentioned above does exist, and they gave me a printed copy. My warranty would have covered replacing it up to 76,000 miles, but I'm now at 88,000+ miles.

The part number in the TSB is EL3Z-14293-A, called a Fuse Relocation Kit. The price of the part is $22.56. According to the TSB, it takes 0.6 hours of labor to install, and the labor alone would be $109.95.

I think I'll just buy the kit and install it myself. According to the TSB, the instructions are in the kit.

BTW--According to the TSB, it applies to 2009-2014 F150s, not just 2009-2010.

VDragonfly

I want to thank members of this forum, those responding to this thread and at least one other thread on the fuel pump fuse. My 2010, 68K miles wouldn't start last night. Sure enough slightly melted #27 fuel pump fuse. Replaced it and the F150 started just fine.

Now where does one pick up that fuse relocation kit? At the Ford Dealer?

Thanks again, Mike G.