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4.7 vacuum leak #793307 09/05/10 12:15 PM 09/05/10 12:15 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck OP Not enough dumb comments...yet
Mr.Yuck OP Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Wife started up her 00 Jeep GC and it sounds like there's a vacuum leak. It changes in sound when you apply the breaks. I looked all over for the leak, sounds like it is coming from around the throttle body. Anybody know where these things tend to pop before I start to pull it apart. Engine still runs good, brakes are like a low comp 509 cammed car, one good pedal then soft. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: 4.7 vacuum leak [Re: Mr.Yuck] #793308 09/05/10 12:41 PM 09/05/10 12:41 PM
A Anonymous Unregistered
Anonymous Unregistered A	remove the idle air plunger from the throttle body--two Torx screws--clean the carbon off the plunger and the seat inside--might just do the trick only take 5 minutes

Re: 4.7 vacuum leak [Re: ] #793309 09/05/10 01:49 PM 09/05/10 01:49 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck OP Not enough dumb comments...yet
Mr.Yuck OP Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	what's an idle air plunger??? I see the torq screws.

Re: 4.7 vacuum leak [Re: Mr.Yuck] #793310 09/05/10 02:05 PM 09/05/10 02:05 PM
Joined: Jan 2005 Posts: 12,422 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,422 Kalispell Mt.	I have seen the little rubber hose colapse on the outside of the corner and makes a sucking noise. I can't remember witch hose it is mabey PCV ? I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 4.7 vacuum leak [Re: Mr.Yuck] #793311 09/05/10 09:18 PM 09/05/10 09:18 PM
Joined: Jul 2010 Posts: 295 Vallejo, CA D ditchdrift enthusiast
ditchdrift enthusiast D Joined: Jul 2010 Posts: 295 Vallejo, CA	really sounds brake booster related. make sure the booster is retaining vaccuum.

Re: 4.7 vacuum leak [Re: ditchdrift] #793312 09/06/10 11:31 AM 09/06/10 11:31 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck OP Not enough dumb comments...yet
Mr.Yuck OP Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: really sounds brake booster related. make sure the booster is retaining vaccuum. I hope it's not the booster. but you can hear the hiss by the brake pedal.... but when you check outside in the engine bay the sound is loudest by the TB.

Re: 4.7 vacuum leak [Re: ] #793313 09/06/10 12:38 PM 09/06/10 12:38 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck OP Not enough dumb comments...yet
Mr.Yuck OP Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: remove the idle air plunger from the throttle body--two Torx screws--clean the carbon off the plunger and the seat inside--might just do the trick only take 5 minutes ok that was dirty cleaned..not it. It does sound like the booster is bad. So how many hours does that pay? I guess I can do it but if it's only like an hour I'll pay a shop.

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