We have just purchased a used Ford, E450, BigFoot, 2002, Class C, motor home with the Ford V 10 engine. It has the Banks Power Pack intake/ headers package and while I was servicing the K&N intake filter I looked down through the small opening at front of the engine intake manifold that’s sits above the engine “Y” area where there is a large space under the manafold and much to my dismay found a large rat/ desert pack rat nest. The motorhome came from Los Vegas and I purchased it in Northern Cali. That large straw filled nest has been in there for a questionable amount of time and it is a wonder that the engine heat driving up from Vegas did not start a fire.
I had to take off the back engine dog house cover and use an electric leaf blower and a stick to probe the nest from the front and back of the engine to blow all of that straw/poop out of there,….what a mess.
Take a look at yours as you might have a surprise.