Increasing the rpm does not decrease the whistle, I think as the rpm's go up the whistle increases but its hard to tell because the motor drowns the whistle.
But I am thinking that if it were a vac leak it wouldn't come and go. ... would it?
I did notice that when I shut the motor off the...
Yesterday I was in search of the vac leak. No luck. The hose on the PCV is new, correctly connected, also looks like a new boot on it too.
I was looking at the hose that comes out the top of the air intake where it meets the throttle body. It snakes around the rear of the motor thru a small...
Hi everyone,
I just got a 2001 Expedition EB 5.4
On my way home I stopped for fuel I was checking under the hood and I noticed a whistle coming from near the rear of throttle body. I giggled the hoses and it would go away, but the whistle would come back. then about 5 miles later the check...
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