I have changed the fuel filter, air filter, 38,000 miles on 2003, and recently (last 2 months) we have experienced lag, hesitation, until we reach 1500 to 1700 RPM's. Did not happen previous.
Injector Plugging/restrictions? Remedy?
or other?

Please set us in the right investigatory path.

You are all GREAT!
Thanks for Your Help in advance.
Ron & Jodi

 

sounds like my truck,I have replaced the pressure relief valve and it got a little better,then my inj. pump started leaking so I rebuilt the pump and it got a little better again but still not what it used to be.so recently I got a rail pressure a guage and come to find that the most rail pressure I can get even with my mods is 18000, so this has now led me to the fuel control actuator.

 

Have either one of you changed anything on the exhaust?

 

nope stock exhaust,last night I unplugged the fca and started the truck and my pressure shot up to 26000 so I know the pump is fine and everthing up on the fuel rail is fine so now I'm pretty sure it's the fca.

 

hey what would that really do. i just ordered a 5" turbo back from shop diesel perormance staright pipe. Im hoping it works ok. i would like to keep my stock downpipe if i could. i hear thats the only thing that hurts performance.

 

higher flowing exhaust tend to take a little away from bottom end,but my problem is definately lack of fuel