2010 F150 Cranks Ok, No Start Intermittent

Darren Technician Wisconsin Posted   Latest  
Unsolved
Driveability
2010 Ford F-150 FX2 5.4L (V) 6-spd (6R80)
Crank / No Start

The few times I got it to act up I noticed cylinder head temp sensor reading 1800 degrees fahrenheit on scanner and no fuel pressure. Both items seem unrelated but you never know…..

When it starts the cylinder head temp sensor reads normal and I have fuel pressure.

The lack of fuel pressure and strange temp sensor reading act up at exactly the same time….. 

They disappear at exactly the same time…..

The scanner is a snap on zues with all the updates.

Any thoughts let me know. I will keep you posted as well.

No codes. None .

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Kody Educator
Oklahoma
Kody
 

Check to see if the fuel pump fuse is burnt in the fuse box. There was a TSB for the concern showing how to repair with an overlay. Quick and easy check to do.

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Agree
James Mechanic
Nevada
James
 

Sounds like time for a wiring visual inspection to me.

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Robert Technician
Michigan
Robert
   

Check SI Fords with a CHT sensors are different than non & have a fail safe strategy also WOT gets delayed ..Not sure about the 1800 degree's but at 250 degrees it will disable injectors and try to air cool cylinders in a rolling patterns of injectors disabling ,when above 350 degrees disables all injectors .

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Interesting
Glenn Owner/Technician
Texas
Glenn
   

Hi Darren, Locate fuse #27 and inspect it for burnt pins in the box. The fuse is likely showing signs of heat damage. If it is caught early enough. Also check fuse #43 in under hood fuse box for heat damage. I have read of a corrective action to replace it with a 30A fuse. If it is burnt badly in the box, you may have to disassembled and isolate the wires then install an inline fuse holder with…

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Timothy Owner/Technician
Georgia
Timothy
 

I second checking the fuel pump fuse that commonly overheats. However I just recently had these same symptoms of intermittent crank no start on a 2011 F150. On this one the fuel pump fuse was fine. It turned out to be the fuel pump relay which provides power to the fuel pump driver module was intermittently losing internal contact and we were getting a voltage drop through the relay…

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William Service Manager
Texas
William
 

Check fuel pump fuse see if it's burned. There's an updated maxi fuse relocation kit.

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