4.6L, AWD, 94,xxx miles on it, it is making a most interesting noise.
Background: Vehicle is at a used car lot, I have a friend intrested in purchasing it, she asked me to test drive it with her. During light acceleration, it makes a sound that reminds me of a noisy fan, and it is intermitent. At 35 MPH, it comes and goes, when you give it power it will make the noise again, for a few seconds, than stop for a second, then come and go as it pleases every few seconds. it is acceleration dependant.
Also, at idle, it sounds like a diesel. Not sure if this is a common issue with this engine, or if I should be looking at a cracked flexplate/broken flexplate bolt/rod bearings/other.
Thanks