AFM Lifter Tick

[DCazares]

Good day everyone,

 

Yesterday as I was driving to the store, I got a CEL and reduced power/jerking.  Got home and checked the code and it was P0324, knock sensor.  I don't know if it's coincidence but I added 80z of Seafoam high mileage to the crankcase and the remaining 8 0z to the fuel tank at 3/4 full (total of ~75miles traveled) as I planned to do an oil change today which I already did.  After the oil change I started the truck and decided to take it around the block, no CEL and tick is still present.  I did notice that it went away as soon as V4 mode engaged.  

 

Am I looking at a collapsed lifter?  Tips on what I should do on my own before I take it to a shop?

 

Located in Houston, TX if anyone has any recommendations on a reputable shop.

[14burrito]

Collapsed lifter, I believe, you'll have a hard misfire fault.

 

I guess the first thing to do, if you feel the valve trains noisy, remove the covers and check the movement on all the lifters and then go from there.