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Old 11-23-2008, 01:22 PM
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Glow plug growl

Ok, ever now and then when I start my truck I hear this weird sound. It happens when I turn the key to the glow plug position. Most of the time it is a quiet low level hum, and sometimes it is a loud growl. Almost sounds like a mini air compressor pump is running. Truck starts great, but the noise is a problem. I just wish I knew what this is and if its normal. I tried a search, but no luck. Please help.
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Old 11-23-2008, 01:27 PM
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I hear a high speed clicking every time I start my truck. Never really thought about it. I just know that the truck starts great everytime even with the temps in the teens without being plugged in. I just use it to know when it is time to kick the key to the start position since I am usually standing outside the truck smoking. I think it is normal but you have me curious now.
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Old 11-23-2008, 01:28 PM
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Yep mine does the exact same thing. I asked about this last year and i think they said it was the power brake boost building pressure. Either way nothing to worry about. I will see if i can find exactly what it was, but i though it was in the power brakes.
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Old 11-23-2008, 01:34 PM
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Ok i found my old thread and they said it was either the ABS pump or the vaccum pump cycling. I knew it was something like that. It seems to be a common thing. Mine has done it ever since i bought the truck and nothing ever changes.
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Old 11-23-2008, 01:35 PM
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just a little more information. It seems the growling sound is coming from the right side of the truck, in the passanger engine bay area.
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Old 11-23-2008, 01:37 PM
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Quote:
Originally Posted by dieseldan2005 View Post
Ok i found my old thread and they said it was either the ABS pump or the vaccum pump cycling. I knew it was something like that. It seems to be a common thing. Mine has done it ever since i bought the truck and nothing ever changes.
I am greatful for the help, but I am driveing a 6.0. I noticed yours is a 7.3. I am wondering if that makes a difference, or is the system the same on each of the trucks.
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Old 11-23-2008, 01:38 PM
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I'm not sure where the vaccum pump is on a 6.0, but maybe its over there.
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Old 11-23-2008, 08:52 PM
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Yep, most likely the vacuum pump your hearing. Passenger side fender behind the battery.
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Old 11-23-2008, 09:07 PM
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Quote:
Originally Posted by dieseldan2005 View Post
Ok i found my old thread and they said it was either the ABS pump or the vaccum pump cycling. I knew it was something like that. It seems to be a common thing. Mine has done it ever since i bought the truck and nothing ever changes.
i hear it too, its kinda loud and then dies down...

I also hear a deep thumb every once in a while from what sounds like is coming from the front right. I was told its the brakes checking themselves? (im a 7.3 guy too, sorry)
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