Manifold caked with filth

Definitely. Luckily I'm in North Georgia where our biggest threat is red clay, so I don't have to worry about that problem too much. Cleaning is a massive pain, though.

 

Excess air? Pcv/egr failure?

 

It is nasty. Used to go to Baja quite a bit on the bikes, would run a pre filter cover, plus brought extra filters with us. That silt is no joke.

https://www.youtube.com/watch?v=20aJ7otu9i0

 

This is one of the easier trails where I am, my truck doesn't seem to care too much! https://clipchamp.com/watch/aIcMs731S6U

 

Yeah not much dust there!

Decent video on raised intakes vs. silt, or as they call it overseas “fesh-fesh”

https://www.youtube.com/watch?v=JXg0klNSV9o

 

Very curious what the silicon levels will read!

Impressive that it's been running ok with what he's found past the filter.

 

I'd say Blackstone results would be off the charts. Sad to say with the cylinder 5 miss that dirt didn't stop at the intake. It is a testament to just how tough these Toyota engines are though.

 

I'm looking to convert my current snorkel top fitting to one like you pictured

 

This thread is entertaining like the oil change threads. K&N hate but Toyota sells their branded version. Haviging used both the TRD filter is more robust.

 

AKA the bird feeder.

https://store.sy-klone.com/9001-sy-klone-series-9000-engine-precleaner

 

Wouldn’t buy that either. K&Ns aren’t terrible but wouldn’t use in a heavy dust application without a foam prefilter wrap like what is pictured on that sand rail earlier in the thread.

 

Not just the dust, that terrain will tear any vehicle up fast. Thanks for posting it.

 

After reading these posts and seeing the videos, the first thing I'm going to do in the morning is check / replace my air filter. - I use Wix.

 

Total hell on equipment, people spend millions and millions to do so.

I’d probably pull the heads. See if the cylinders are scorn, and take look at the valves.

 

I wish I had prior experience with this task.

 

Pulling the heads might be a bit excessive, in my opinion. Tossing the upper intake and removing and cleaning the lower is as far as I would disassemble. I would however borescope and/or do a compression test at this point because you have a misfire and rough running condition... atleast a compression test will be easier with the intake already off.

if your compression test is alright then count your blessings, clean the intake ports with a shop vac in the port as you clean, reassemble with a new upper(and if in the budget lower) intake and find the cause of your misfire... hopefully it's a coil pack and everything else is fine

 

….or clean it up the best you can, button it up, and trade that sucker in.

 

Nothing to argue about here. OPs photo clearly proves trash is getting by his filter unless he has a loose clamp or something.
Trash gets by your filter like that it’s time for a better filter, like OEM paper.

 

This is what I would do

 

I worked with a contractor dude and he had a K/N. it was so overly oiled. it was crusted, and everything downstream was crusted just like this photo. the company mechanic said you kinda have to nail the perfect oiling. I tossed mine shortly afterwards. I was heavy handed as well.