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Vacuum hose leak?

Tiny
FRANKQUALLS
  • MEMBER
  • 1986 MERCURY COUGAR
  • 3.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 16,000 MILES
Car starts and idles for like 1-2 minutes and somewhat of a hissing noise under engine bay. I don't know where all of the hoses are, a diagram would be nice.
Thursday, September 12th, 2024 AT 8:21 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
Here is how you can find the vacuum leak and I have included the vacuum line routing diagrams as requested.

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

Check out the images (below). Please let us know what happens.

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Thursday, September 12th, 2024 AT 10:20 AM

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