Glow plug growl - Ford Powerstroke Diesel Forum
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post #1 of 9 Old 11-23-2008, 01:22 PM Thread Starter
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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.

2004 F350 CC long bed 4x4
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post #2 of 9 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.

Josh

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post #3 of 9 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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post #4 of 9 Old 11-23-2008, 01:34 PM
If it aint a CAT itsa DOG

 
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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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post #5 of 9 Old 11-23-2008, 01:35 PM Thread Starter
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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.

2004 F350 CC long bed 4x4
4" silverline turbo back, Airaid intake, Zoodad
2.5 skyjacker leveling kit with airbags in rear
Auto Meter pyro, boost, trans gauges
And one pretty red paintjob

"Is your truck broken???, No, it's stroking"
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post #6 of 9 Old 11-23-2008, 01:37 PM Thread Starter
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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.

2004 F350 CC long bed 4x4
4" silverline turbo back, Airaid intake, Zoodad
2.5 skyjacker leveling kit with airbags in rear
Auto Meter pyro, boost, trans gauges
And one pretty red paintjob

"Is your truck broken???, No, it's stroking"
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post #7 of 9 Old 11-23-2008, 01:38 PM
If it aint a CAT itsa DOG

 
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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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post #8 of 9 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.

-Chris-
2003 F250 SC/LB 6.0L 4X4
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post #9 of 9 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)

Joe

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