2008 Ford F-150 - Crank, No Start
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Here is a list of tools I use every day at the shop. Let me know if you use them too in the comments!
General Information: This truck was towed in to the shop with the complaint of it does not start. It will crank fine, but won’t start or stay running. The customer stated that the sensor we just put on, a month or so ago, has went bad.
First Thoughts: I have worked on this vehicle before. It is the 2008 Ford F-150 case study that needed a crankshaft position sensor. It’s a possibility that the sensor went bad, but the only way to find out is to look.
Diagnostics: First thing I noticed when I turned the key on to the truck was “ding ding ding” and a low fuel message on the screen.
…
It’s a possibility that the fuel gauge doesn’t work. I’ll keep searching for the problem.
First thing to check is if the crankshaft position sensor I put on a month or so ago is still working.
Do I have RPMs on the scan tool? Yep, the crankshaft position sensor still works.
Sense I noticed that the low fuel light was on, I decided to check fuel pressure on the scan tool.
Looking at the live data picture at the top of the page. With the key on, engine off, and not cranking.
The desired fuel pressure is 57.2 psi.
The actual fuel pressure is 8.9 psi.
Seems a little low.
I try to start it. It starts and almost immediately dies like it’s running out of gas.
I then decided to get the gas can and put gas in it.
Frequently Asked Question:
Where do I find wiring diagrams and step-by-step repair procedures for Fords?
The best online resource I use is Alldatadiy.com.
I used it for this case study to find the correct procedure for this 2008 Ford F-150.
And….
It started and ran perfectly.
Fuel pressure was correct. Fuel gauge works fine.
All it needed was gas. Fixed!
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