2006 F450 DRW
I have no power whatsoever. Have done fuel filters and nothing else to fuel system. Have 45-50lbs of pressure. What could cause this and how do I check?

 

Check you engine fuel filter. If it is twisted or crushed no fuel will flow. The filter mount is a shutoff valve. When installing this filter you need to snap it into the top then install. If you don't you risk filter misalignment and twisting or crushing the filter.

Ed

 

Just did fuel filters earlier today. It idles fine but low fuel pressure. And no power when driving

 

have you done the blue spring upgrade to increase fuel pressure?
Check your CAC boots? Have any trouble codes?

Have any device to read live data, like Scan Gauge II or Torque Pro for Android?

 

Blue spring upgrade? Cac boots? Not a diesel mechanic. I have a basic harbor freight scan tool(limited live data). No Dtc at all. I bought the truck in Texas drove it home to Florida trannny gave out in Alabama. Put a transmission and torque converter in it now I'm having problemTranny felt like it was bad again but turned out to be fuel filters and air in system. Now it has no power.

 

your going to need one of these;A device to read live data, like Scan Gauge II or Torque Pro for Android.

Probably a leaking High Pressure Oil system, without a gauge, your guessing. Blue spring is an upgrade to boost fuel pressure, at 45psi or lower, that truck will eat the injectors.

After a filter change, cycle the key at least three times before starting to remove air, pump can be heard, let it run until it shuts off, cycle key and go again. If no luck and it just runs, I'd take filters off, make sure you didn't catch an o-ring and make sure theirs no air leaks around the filters/caps.

 

This guy is pretty darn good:

 

Checked the filters. I have the obd2 dongle for my phone just gotta find. Did just purge the air from the system nothing changed tried driving with the gauge it flutters between 30-50 dipping on throttle position

 

Most will advise anything below 45 psi on fuel and you risk injector damage

 

Can I get this upgrade at my local parts store? Or the dealership

 

yes, they carry the Blue Spring Upgrade at the dealer or you can order it on-line from a site sponsor here.

A small dip is ok and most trucks at WOT get down around 50psi... but anything under 45psi, as stated above, could be bad for injectors.

AND find that dongle, you need to look at HPO system pressure and a few other things to narrow it down.