Vacuum lines diagram needed?

GYPSYTATTOO23

MEMBER
2002 PONTIAC MONTANA
3.4L
6 CYL
AUTOMATIC
175,000 MILES

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!

Tuesday, December 26th, 2023 AT 7:27 PM

3 Replies

JACOBANDNICKOLAS

MECHANIC
110,068 POSTS

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.

Images (Click to make bigger)

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Tuesday, December 26th, 2023 AT 10:07 PM

GYPSYTATTOO23

MEMBER
2 POSTS

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!

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Wednesday, December 27th, 2023 AT 11:57 PM

JACOBANDNICKOLAS

MECHANIC
110,068 POSTS

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

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Thursday, December 28th, 2023 AT 5:41 PM