Vacuum leak

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Jun 20, 2009 | 07:21 PM

crum71

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1/8 mile Oval Track

Joined: Dec 2007

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From: Newport,Tennessee

Vacuum leak

I know this has been discussed many times, and I was going to try and figure it out on my own. But I am out of ideas. About a week ago now, my AC stopped blowing through the vents and only on my windshield. I unhooked the vacuum line going to the 4 wheel drive,because it doesn't work. I also have a boost leak which I found out that wouldn't cause the vacuum leak. So my next question is,what do I check for? I also need to replace my 6637 in a Bad WAY. lol I went on a trip last week, pulling 3 4 wheelers and my EGT's got high on me. And today I noticed that I am only pushing 20 or so on the boost gauge.

Jun 20, 2009 | 08:14 PM

zx250

Of the next Riffraff East

Joined: Oct 2004

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From: Concord NC

Unhooking the line to the hubs will create a leak unless you plug it off. Need to find that boost leak and for sure change that filter.

Jun 20, 2009 | 08:32 PM

crum71

Thread Starter

1/8 mile Oval Track

Joined: Dec 2007

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From: Newport,Tennessee

I plugged it off at the vac box. Going to order a filter Monday,should have it Tuesday. It buggs the pee out of me not knowing what to do to fix it.

Jun 20, 2009 | 08:35 PM

zx250

Of the next Riffraff East

Joined: Oct 2004

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From: Concord NC

You need to make sure you vacuum pump is working, then check the canister for cracks or holes. Next you need to check the vacuum line going to the HVAC controls. Hopefully it's not under the dash, but it could be under there as well.

Jun 20, 2009 | 08:39 PM

crum71

Thread Starter

1/8 mile Oval Track

Joined: Dec 2007

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From: Newport,Tennessee

How do I check to see if the pump itself is working? Pull a hose and see if I get suction? Its strange that it just stopped working

Jun 20, 2009 | 08:42 PM

zx250

Of the next Riffraff East

Joined: Oct 2004

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From: Concord NC

You can hear it. Key on, engine off, it should run for a few seconds to build vacuum. If it runs a lot, then you have a leak, if it don't run at all, then you have a bad fuse or pump or even a bad connection.