6.2l oily build up in intake m. HELP

[julie]

This girl needs some help. My truck is running like poo and I need to fix it. So here is the problem. My truck was having a lot of difficulty accelerating, it actually died yesterday while I was accelerating. So here is what I have done; I replaced the fuel filter and air cleaner. Now, upon removing the air cleaner assembly I find that there is an enormous amount of oily build up in the intake manifold, I mean gobs of icky oily build up. Can someone please give me an idea as to why this is and is it hard to fix? Thanks Julie

[john8662]

Hi Julie,

Welcome to TDP forums.

Give us a little more information on your truck.

Year, model, interior color, you know the drill ;)

Two separate issues here:

Dieing. Sounds you like you did the cardinal thing to do in this situation. Change the fuel filter. Besides that it's mechanical troubleshooting. Could be a kinked line, or a fuel lift pump on the side of the engine that's failing causing the dieing down to the injection pump itself. Were you able to easily prime the new fuel filter with the existing pump?

Black clogged intake. Welcome to C-Series 6.2L (light duty 6.2 version) because it has an EGR (Exhaust Gas Recirculation) system on it. In short it eats it's own exhaust at times, which being around Diesel's is black carbon, that of course builds up over time (mixed with some normal blow-by the engine consumes).

I'd say don't worry about the intake condition because that can be upgraded later down the road for a J-Series Non-EGR manifold.

Fix the dieing part first! It ran just fine with the intake is has now before it developed the new problem.