2022 F150. 5.0 V8.
Just went over my 100k warranty and 3 days later… I’m in park with the truck on, it shakes for a second and shuts off. Can’t get it to start back up. Throws 3 codes. P008A- low fuel pressure. P0087 - low fuel rail pressure. P0627- Fuel pump open circuit. Great. I tow it to the dealer expecting them to say I need a new fuel pump. They call and tell me 6% compression in two of the cylinders. And want me to pay $16k for a new engine. Any advice would be welcomed. Thank you!

 

This is crystal balling.
From your post, those cylinders should have set code. If you did not see them????????? Sudden failure is questionable.
If the fuel pump circuit is open, believe the code. Engine won't run without fuel. The 627 code supports the other 2 codes.
Can be anywhere from the pressure controller to the top of the tank in the harness or connectors.
An engine replacement can run that high depending on the cost of the replacement, whether short Block or full engine.
The Cab is lifted off frame to do the work plus Oil, Coolant and misc. parts.
Good luck.

 

I'm just trying to figure out why they did a compression test on a truck with fuel pump codes. I've been a tech for 20yrs and I would be diagnosing the no start and the fuel pump circuit codes first before condemning the engine. If you didn't have the fuel pump circuit code it may have been plausible that the two weak cylinders had a di injector failure and washed the rings out, hydrolocked the cylinders or are bleeding compression... To me it doesn't sound like they want to fix your truck just want to upsell you then tell you oh it needed a fuel pump as well after you replace the engine. Honestly I'd take it somewhere else and get a second opinion. A cost of a tow and a second opinion is way cheaper than $16k

 

Sounds like a scam to me. Sounds like you need a new fuel pump or a wiring problem. Did you check fuel pump fuse? Good luck.

 

Ya, I call BS on this also. Was the truck running good when you got to the park? Electronics can die at anytime with no warning, but I can't believe it took 2 cylinders with it that were good a few seconds ago. I agree that the best advice would be a second opinion, I don't know if I would even trust them to fix the fuel issue. Jim