I have a 98 lincoln navigator I recently pulled the codes p0171 and p0174. Whenever I accelerate it makes a loud hissing noise and it also sounds like alot of air is either getting sucked in or sucked out like a propeller. I recently did some work on it such as replacing the sparkplugs which I had to remove the fuel lines which were connected to the fuel injectors, had to remove the throttle body to get to the idle air control.
have the same problem?
Thursday, January 13th, 2011 AT 10:39 PM