vacuum leak ?
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Junior User
Joined: Oct 2007
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vacuum leak ?
for the past 3 or 4 weeks i have heard what i could only describe as a vacuum leak, seems to be behind the center of the dash. goes away under acceleration and is most noticeable at 15 to 1700 rpm. position of controls (defrost etc.) does not seem to make any difference. Help Please.
2001, DRW, 6 Speed, 2WD, 350, all stock
2001, DRW, 6 Speed, 2WD, 350, all stock
Last edited by inspector1; Feb 17, 2008 at 06:32 PM. Reason: add truck description
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Junior User
Joined: Oct 2007
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heat and air do work correctly,
just that i am not that familiar with diesel engines/trucks, this is my first, and the sound is loud enough to hear while driving, and it bugs me not knowing what may be causing it.
i have had the truck for about a year now and only in the past month or so has the noise been noticeable to me.
thanks for the welcome to the forum and the replies.
just that i am not that familiar with diesel engines/trucks, this is my first, and the sound is loud enough to hear while driving, and it bugs me not knowing what may be causing it.
i have had the truck for about a year now and only in the past month or so has the noise been noticeable to me.
thanks for the welcome to the forum and the replies.
Elder User
Joined: Jun 2007
Posts: 853
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If you are sure it doesn't go away when it is COMPLETELY warmed up.And it takes a long time for these trucks to get that way{about 15-20min.}.Then I would check the only vacuum lines there are behind the dash.Those are for the air handler vents.There is really not much vacuum on these trucks.if it is a vacuum leak it shouldn't be too hard to find.The reason i keep harping on the ebpv is because your description sound exactly where it should be.And what mine sounds and acts like.
Of the next Riffraff East
Joined: Oct 2004
Posts: 8,679
Likes: 2
From: Concord NC
You could unplug the vacuum pump and go for a drive, If you still hear it, at least you will know that it's not the vacuum.
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Senior User
Joined: Nov 2007
Posts: 173
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From: Huntington, WV
Do you still have the factory air intake? I just changed mine to the 6637 air filter and it sounds now what could be perceived as a vacuum leak
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Thread Starter
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Junior User
Joined: Oct 2007
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thanks again for the replies,
the truck may not be fully warmed up as i have about a 30 min ride to work and this time of year it is cooler in the mornings. i will pay closer attention tomorrow both on the drive in and the drive home.
may try unhooking the pump tomorrow after work, cant hurt to check it out.
the truck may not be fully warmed up as i have about a 30 min ride to work and this time of year it is cooler in the mornings. i will pay closer attention tomorrow both on the drive in and the drive home.
may try unhooking the pump tomorrow after work, cant hurt to check it out.
Elder User
Joined: Sep 2007
Posts: 895
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From: Lenhartsville PA
Welcome to FTE !!!! Glad to hear your freinds here at FTE helped to resolve a problem for you, and many more to come.. That's why I became a Supporter!!! Alittle while on here, and you will be helping others out too...
