I took apart my intake today and the bottem hose of the 2 there was a yellowish sludge ( had a slight hint of fuel smell but felt like it had oil in it) and i look into it further and the same build up was on my oil fill tube as well...... please help i think i am looking at a big bill

 

I'm sorry, we need to know what is going on, not just what you see. You know, Year, Make, model, engine size, tire pressure, color, and girl friends cup size always helps.

 

its a 99 f150 4x4 with a 5.4

 

im lost...lol... what are you wanting to know

 

I am trying to figure out what is causing this yellow build up in my intake and in my oil fill tube

 

Sounds like you have coolant getting into your oil. If it is in your intake then I would suspect a bad intake gasket.