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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 03-22-2008
mattp0718's Avatar
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Weird Sound

During the summer when it gets nice and hot outside my truck sometimes begins to make a very loud low humm...It's really loud and seems to come from my cold air intake, but its not the intake because it made that sound before I got my K&N...Does anyone know what that sound is all about?
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Old 03-23-2008
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IAC or Idle Air Controller. I told everyone I had a choir boy trapped under my hood for some comic relief. You can try taking it off and lubing it, I tried that but to no avail.
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Old 03-23-2008
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Yea i guess that makes since thanks man....but is it bad for it to make that sounds?
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Old 03-28-2008
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Iam thinking Fan. I put an aftermarket high flow fan blade on my 95 and when the engine warms up it makes a VERY LOUD low hum.
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Old 04-07-2008
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Ok yea sounds like my problem, its a very loud low hum, but i haven't put an after market fan on my truck....
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Old 04-10-2008
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My factory fan still hummed but the after market made it louder
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