I have a 2006 F150 5.4 3V xlt with 160k miles

the truck will start surging with slight acceleration especially if under a load or in cruse control. This is happening at any speed.blue drive live monitor is showing the accelerator % spiking at 75% fluctuating and going back to normal when it stops. At idle it is 14% normal driving is 21% give or take a little. If you reset accelerator by ignition on slowly pressing pedal and releasing then ignition off three times it seems to get better for a bit.

mode 6 was showing a lot of misfires but not enough to throw fault until plug 8 really got bad. Replaced #8 and no more flashing light. will change other 7 plugs soon. Fixing to clean maf sensor and thinking about changing PCV valve. I have swapped cops and misfires did not follow cops. May also change fuel filter as well.

Not sure if related but but does not seem to have any real power if you punch it to pass.

codes are p0345 p0349

yes sounds like a diesel so I’m thinking driver side cam phaser will fix codes. I have swapped vct valves left and right after cleaning them out (screens looked great) just for kicks as well as changing csp sensor and swapping sides. Have changed oil and air filters.

Thanks in advance for anything you can do to help me out.

ill be changing the rest by this weekend. Thanks for the pcv info. Will post results of plug change when im done.

ok cleaned MAF and fuel mialge is looking a bit better.

changed spark plugs none broke and surging while slightly accelerating has been fixed.

what i did to change plugs is as follows. Ran multiple tanks of gas with additive to eliminate carbon. Machined a tool that fit precicly in spark plug well allowing my ratchet and extension to remain perfectly straight and cracked each plug 1/4 turn sprayed each plug with a carbon eating spray let set until it quit bubbling (changed them while hot) then sprayed we-40 with silicone in plug wells then slowly 1/4 or les turn at a time removed all plugs with no problem and lots of prayer.

now for p0345 and 349 cam position sensor and intermittent error. I’m thinking the plate on back of cam phaser is out of alignment.

One other question i am I am noticing a rubbing noise kinda like tire is rubbing fender well some times when turning. Any ideas.

Yes I believe perfect alignment of extension and a hot engin are key to removing without breaking. Though I think carbon cleaner and lube can help.

Everything went great but next next day I was suffering from bad misfiring due to moistur in plug wells. Fixed after blowing them out and cleaning boots and springs. Reapplied dielectric silicone as well. Should have cleaned them out during initial plug change.

That is located on rear end correct

thanks.