Vacuum Leak???
#1
Vacuum Leak???
I hear the sound of air moving (kind of a whoosh sound) coming from under the dash on the passenger side. It seems to get a little quieter as the truck warms up.
Maybe a vacuum leak or just the sound coming from under the hood?
It is a 2001, 4x4, 4.0, Auto, Super Cab with a K&N intake and Magnaflow exhaust.
Has anybody ever heard of this?
Maybe a vacuum leak or just the sound coming from under the hood?
It is a 2001, 4x4, 4.0, Auto, Super Cab with a K&N intake and Magnaflow exhaust.
Has anybody ever heard of this?
#6
#9
Additional info:
I can hear the sound when it's cold. When I put it in gear it gets much louder. It is quieter when in park or neutral. Once it warms up it is gone.
When the hood is open the K&N intake sounds pretty loud cold or hot. I don't know if it has anything to do with it, just thought I should mention that.
I can hear the sound when it's cold. When I put it in gear it gets much louder. It is quieter when in park or neutral. Once it warms up it is gone.
When the hood is open the K&N intake sounds pretty loud cold or hot. I don't know if it has anything to do with it, just thought I should mention that.
#12
Injectors use PWM (Pulse Width Modulation), I'm not sure about the IAC. DC to DC voltage regulators also use PWM.
Last edited by Takeda; 02-27-2009 at 10:02 AM.
#13
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