I recently picked up a really clean 2011 F150. Once thing I notice is the brief smell of manure at startup. I bought a ventilation cleaning kit which has a hose to snake up the drain hose. Little did I know how much of a PITA this was going to be. Best I can see, the drain is behind the heat mat on the firewall and not easy to get to.

Questions - Is there another way into the system? Since there isn't a cabin filter (first odd discovery for a modern vehicle), can I get in through the intake side?

Anyone do this before and have some tips?

Thanks

 

Try watching this, or this, .

 

Thanks! I am wondering if the firewall material has pushed itself in front of my drain tube as I don't see it but I have good drainage and its coming from between the material and the firewall at the bottom. I'll poke around at that and maybe I can get the tube in there to spray the foam in.