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Loud sound coming from engine. Sounds like a vacuum leak.
Posted: Mon May 02, 2011 1:26 pm
by DMT00
2000 LT AWD 143,xxx miles.
At idle there is a pretty loud sound, sounds like a vacuum leak, sounds like this "beeeeeeeeeeeeeeeeeeeeeeeeeeeeeeep". Tap the gas and it goes away until it returns to idle. No codes. I plan to look a little closer when I get a chance to tear into it.
Any ideas? Common reasons for this sound?
Re: Loud sound coming from engine. Sounds like a vacuum leak
Posted: Mon May 02, 2011 2:30 pm
by MountainManJoe
beep? are you buckled in?
Re: Loud sound coming from engine. Sounds like a vacuum leak
Posted: Mon May 02, 2011 5:18 pm
by 1Gary
If you have A/C,I suggest you check the vac lines for that.
Re: Loud sound coming from engine. Sounds like a vacuum leak
Posted: Mon May 02, 2011 5:28 pm
by DMT00
After removing the dog house again I noticed the sound is coming from the fuel injector connector area. Move it or cover it with your hand and the sound changes. I was told you have to remove the intake manifold to replace the o ring. Is this true? Spraying brake clean all around the area does not result in a raise of the idle.
Edit: After some research the item I am referring to is the fuel injector plug. Not the injector its self.
Re: Loud sound coming from engine. Sounds like a vacuum leak
Posted: Mon May 02, 2011 5:29 pm
by Smiliesafari
Check the rubber connector that connects the hard line to the PCV.
Re: Loud sound coming from engine. Sounds like a vacuum leak
Posted: Tue May 03, 2011 4:11 am
by DMT00
Smiliesafari wrote:Check the rubber connector that connects the hard line to the PCV.
The pcv is in the front passenger side of the intake manifold, correct? The noise is 4 times as loud inside the van with the dog house off. We pulled the hose off the pcv and plugged up both sides. Very little sound coming from either.