Loud click, like a clutch engaging while idling - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

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Old 04-15-2011
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Icon10 Loud click, like a clutch engaging while idling

I've noticed that when my 3.0 is idling in park, or even sitting at a light in drive, there is a sound like a clutch engaging or something, kind of like turning on the air or something. You can hear the click and then the engine revs up a little to compensate. I can't help but think it's robbing some horse power and maybe causing some MPG loss, it happens every couple of minutes or so, I thought maybe it was the fan kicking in, but it doesn't make sense that it would be doing that all the time, anyone experience this?
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Old 04-15-2011
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Ac compressor
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Old 04-15-2011
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I'm not using the AC though, would it do that even if the air is off?
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Old 04-15-2011
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The compressor kicks on and off regardless of whAt setting you have on the climate controls. It is very normal, but can cause a very slight power and mpg drop.
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Old 04-16-2011
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Well, if I keep the controls on vent, floor, or off, it doesn't do it. I am told when the control is on defrost of any kind, the AC compressor kicks on to act like a dehumidifier, I am going to check the mileage again now, I was averaging 15.5 miles a gallon, but I am thinking it will go up a little because I pretty much had it on defrost all the time, I'll post the results.
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