Vacuum leak

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Aug 21, 2025 | 09:34 AM

Jag xjl

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Joined: Jul 2025

Posts: 7

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From: Pennsylvania

Vacuum leak

What are the most common areas for a vacuum leak on 2014 jaguar xjl? I replaced my pcv valve cap, because it was leaking but I still hear a hiss coming from that side. I can’t pinpoint it. Does anyone have a clue or point me in the right direction.

Last edited by Jag xjl; Aug 21, 2025 at 09:36 AM. Reason: Forgot my signature

Aug 21, 2025 | 11:35 AM

NBCat

Joined: Jan 2012

Posts: 6,068

Likes: 2,982

From: Newport Beach, California

The most efficient method to identify any vacuum leaks is with a smoke test.

Aug 21, 2025 | 03:01 PM

Thomas-S.

Veteran Member

Joined: Sep 2021

Posts: 1,006

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From: Nuremberg

...and you would get better help if you posted your querie into the right forum. This is the one for the X350-X358, built upt to 2009.

Best regards,

Thomas