Is this a 5.4L V8? As far as the smaller vacuum lines, are you refering to the hard plastic ones? If so, remove them and replace them with the standard type rubber hoses that will fit. If this is the 5.4L V8, behind the throttle body is a vacuum line that goes down then has a 90 degree bend in it. They are common to dryrot and cause major problems. However, your description says you feel air blowing from the air cleaner. The engine wouldn't run if the air cleaner was blowing out air, so check for another source for the air. Also, if it sounds like a moose, there has to be a large leak. That is what is setting the lean mixture on both banks (check engine light). Many people check for leaks the following way:
PLEASE NOTE: YOU MUST BE EXTREMELY CAREFUL WHEN DOING THIS!
Start the engine and spray carb cleaner or starting fluid lightly around the intake and all vacuum hoses. If there is a leak, the engine will rev-up when it sucks in the spray. At that point, you will know an aprox area where the leak is located to inspect.
NOTE: Both starting fluid and carb cleaner is extremely flamable. IF it hits an exhaust manifold or other component that is extremely hot or if there is a spark, it will catch fire. Make sure to have the proper type of fire extinguishier near you if and when you do this.
Let me know what you find.
Tuesday, December 28th, 2010 AT 2:38 AM