7.3 running issues

[KNiel3378]

I have a 2002 F350 ccsb srw 4x4

I just ran into an issue with a clogged fuel filter after getting some really bad diesel. I changed out the fuel filter and dumped and cleaned the tank and am now running power services diesel 911. That cleaned everything up and the truck is running fine fuel wise, but here is my newest known issue...

At WOT the turbo spools to about 24 lbs and stops at 2800 rpms and the turbo fades down, while still WOT and running the same rmps. I can usually hit 3100-3200 and hold psi at 28lbs and run like a bat outta hell and will only lose psi if i let off the throttle... Any Ideas?

Its a 2002 7.3 with an afe stage 2 cold air intake, mbrp true 4" turbo back straight pipe into 7" stack, ts tuner with beans tunes, wicked wheel, and banks wastegate, and adjustable turbo elbow.

The air filter is pretty dirty... I just ordered a brand new one and itll be here tomorrow. But i was wondering if there could be anything else i need to look for?

 

[jopes]

up pipes leaking? or a turbo boot starting to leak.

 

[KNiel3378]

just checked up pipes they are good. going to pull the intake off and check the spider pipes soon

 

[dmd]

Smoke when it happens?

 

[lincolnlocker]

you changed nothing but a fuel filter?

live life full throttle

 

[KNiel3378]

Fuel filter and currently running fuel additive. Not much smoke when its doing what's mentioned above but smokes well in low rpms and when revving

 

[lincolnlocker]

possibly have a stuck check valve in the filter housing. being a stock fuel filter that is?

live life full throttle

 

[KNiel3378]

Yeah its just a stock fuel filter I picked up from advance

 

[lincolnlocker]

pull it back out... check the black plastic post to see if the plunger in the top center may have stuck. while your in there, may as well gut the plastic piece too.

live life full throttle

 

[KNiel3378]

Emptied the bowl and pulled it back out. What exactly am I looking for?

 

[KNiel3378]

Im not sure if it was stuck, but it was difficult to seperate. Which piece did you say to get rid of

 

[lincolnlocker]

take the empty tube and put it back in the truck. other stuff throw out.

live life full throttle

 

[KNiel3378]

Okay this won't hurt anything?

 

[KNiel3378]

Put it back in and it ran good hit high rpms in the turbo but that was a short drive. I noticed the problem in higher gears at a faster speed so we will see.

 

[lincolnlocker]

its just a check valve for those that are retarded enough to not run a fuel filter.

live life full throttle

 

[KNiel3378]

That's what I figured after looking into what it actually did. It being stuck closed would actually cause something similar to my problem?

 

[lincolnlocker]

or partially closed.... that being he ONLY thing you touched id say it more then likely the problem. unless it wore your pump out by working it harder..

live life full throttle

 

[ChunderDownUnder]

Did you check out the pick up screen in the tank when you had it out??