Vacuum lines diagram needed?

2002 PONTIAC MONTANA
175,000 MILES • 3.4L • 6 CYL • AUTOMATIC
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GYPSYTATTOO23
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My friend is stranded at my house. He has a Vacuum line that got disconnected but doesn't know where it goes, and we can't find diagrams. Very rough idle, actually had muffler explode, backfiring, sputtering out and shutting off. please help!!!
Dec 26, 2023 at 7:27 PM
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JACOBANDNICKOLAS
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Hi,

How big is the vacuum hose? Where on the engine is it located? If you could take a few pics and upload them for me to see, it may be helpful.

As far as the schematics are concerned, I attached the only two I have. Let me know if they help. Also, here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Take care,

Joe

See pics below. Note: Pic 1 is looking straight down on the engine from above.
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Dec 26, 2023 at 10:07 PM
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GYPSYTATTOO23
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Thank you so much for your quick response!!! I passed the information on to my friend and recommended he download your app and continue any line of questions, so I don't have to play the middleman. I must say that I am so impressed with the site that I've recommended it to multiple friends already and if I have any questions for my own vehicle I know where I will be turning. Thank you so much for your time!!
Dec 27, 2023 at 11:57 PM
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JACOBANDNICKOLAS
  • CERTIFIED EXPERT
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Hi,

Thank you and you are very welcome. I'm glad to know the information was helpful.

Certainly, feel free to come back anytime you have questions. It doesn't even need to be a big problem. We are here to help with any type of automotive question.

Take care of yourself and I hope you have a great New Year!!!

Joe
Dec 28, 2023 at 5:41 PM