air escaping sound with driver side window down for first mile or two of driving
The sound is similar to air escaping from a tire valve and lasts for several seconds. The tire air valves are OK. It does no occur at idle, only when the truck is driven. The sound happens several times during the first mile or two of driving. Any ideas?
Oonce you start the car, open the hood and see if you can hear the noise. Might be a vacuum leak.
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