First you need to inspect the fuel tank for deformation due to a failed purge valve.

The EcoBoost has 2 fuel pumps (3 on the RS models) 1 HPFP (high pressure fuel pump) & 1 LPFP (low pressure fuel pump.

The low pressure side is controlled by a FPCM (fuel pump control module). It is monitored by a sensor located in the just behind the engine on the firewall on the low pressure fuel line.

This low pressure system feeds the high pressure pump that is mechanically driven by the exhaust camshaft. This pump is controlled directly by the PCM to add pressure. Note this pump cannot decrease pressure only increase it.

The HPFP feeds the fuel rail located under the intake manifold and is monitored by a sensor on the rail located on the passenger side.

Do you have a way to monitor or log your high and low pressures?

 

Took a look at the fuel tank it looks all good to me. I have a Cobb AP would that be able to log high and low pressures.

 

So this just happened. I popped the hood and the filter is off and is squished???

 

If P018B happens occasionally then it's probably wiring issue. It could be faulty sensor also.
I don't think that intake air filter has anything to do with this fault.

 

Any idea on what sensor to buy? Car hasn't thrown P008B in about a week but is still throwing P018B so I'm interested in changing the fuel pressure sensor out. And for the air filter, I got no clue what happened but I bought a K&N one now and the airbox is staying on from now on.

 

Did changing the low pressure fuel sensor solve P018B?