Hard plastic vacuum line

Tiny
NMILES
  • MEMBER
  • 2000 PONTIAC GRAND AM
  • 3.4L
  • V6
  • FWD
  • AUTOMATIC
  • 235,603 MILES
On my upper intake have a vac port connected to a plastic vac line that run in the wire harness where is this line for and where does it go
Tuesday, March 22nd, 2016 AT 3:31 AM

1 Reply

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
More than likely this is a line that runs from the EVAP to the intake or the intake to the PCV.

Here is a guide that will help with finding vacuum leaks if you need to find one:

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

Please see the info below which is a diagram that shows the routing of these lines.

Let us know what other questions you have. Thanks
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Tuesday, October 26th, 2021 AT 7:39 PM

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