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?
Loud sound coming from engine. Sounds like a vacuum leak.
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MountainManJoe
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Re: Loud sound coming from engine. Sounds like a vacuum leak
If you have A/C,I suggest you check the vac lines for that.
1979 Malibu drag race only car
1999 Sonoma 4.3 5 speed-Rufus
1989 Astro-Ole Yellar cancelled-still selling off parts
1985 Astro-shop van R.I.P. my friend
1994 Astro LT RWD W4.3 rod knock RIP
1982 Winnebago single rear wheel-Chevy 350 Scraped 1/28/13-broken dreams......
Rochester,NY
1999 Sonoma 4.3 5 speed-Rufus
1989 Astro-Ole Yellar cancelled-still selling off parts
1985 Astro-shop van R.I.P. my friend
1994 Astro LT RWD W4.3 rod knock RIP
1982 Winnebago single rear wheel-Chevy 350 Scraped 1/28/13-broken dreams......
Rochester,NY
Re: Loud sound coming from engine. Sounds like a vacuum leak
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.
Edit: After some research the item I am referring to is the fuel injector plug. Not the injector its self.
Last edited by DMT00 on Tue May 03, 2011 4:41 am, edited 2 times in total.
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Smiliesafari
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Re: Loud sound coming from engine. Sounds like a vacuum leak
Check the rubber connector that connects the hard line to the PCV.
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Re: Loud sound coming from engine. Sounds like a vacuum leak
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.Smiliesafari wrote:Check the rubber connector that connects the hard line to the PCV.