2007 5.4 Fuel Pump or Cats

[Blacktruckdave]

So my truck is starting to feel a bit sluggish and I have to put the pedal to the floor to get it to move. Also MPG is terrible.
Question: Is this something replacing the gas tank fuel pump will fix or could it possibly be clogged cats? Truck starts and runs fine and no codes at all. 129k miles on it well maintained. Also rail fuel filter replaced. Thank you in advance

 

[blacksnapon]

So my truck is starting to feel a bit sluggish and I have to put the pedal to the floor to get it to move. Also MPG is terrible.
Question: Is this something replacing the gas tank fuel pump will fix or could it possibly be clogged cats? Truck starts and runs fine and no codes at all. 129k miles on it well maintained. Also rail fuel filter replaced. Thank you in advance

Yes and no. Fuel pump, only if its got low fuel pressure. Cats, only if the exhaust is plugged. Diagnostics are required.

 

[Blacktruckdave]

hi blacksnapon, what should the fuel pressure be at the rail? also I have been thinking about changing the cats and exhaust to a magna flow. Would you recommend upgrading something like that?
Thanks for the quick response

 

[blacksnapon]

Specification
Fuel Pressure
Engine running 193-310 kPa (28-45 psi)
Key ON Engine OFF (KOEO) 240-310 kPa (35-45 psi)
OEM on the exhaust unless you are prepared to spend a lot of money.

 

[Blacktruckdave]

Thank you Blacksnapon for your help.....I know it's gonna cost for the exhaust but I'm gonna end up paying in fuel costs anyway. I love my truck and it's in really great shape for 2007 with 130k miles. DIY as much as I can because I love to learn and love to maintain my own as much as possible. Just looking for solutions to performance and gas milage.