Checking for Vaccum Leaks??
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New User
Joined: Sep 2004
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Checking for Vaccum Leaks??
What is the best method for checking vacuum leaks in the engine compartment? I think I can hear one but I can't pin point it and the truck is idling and running pretty rough?
It's on a 98 EB Expedition 5.4L.
Thanks!
It's on a 98 EB Expedition 5.4L.
Thanks!
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
Hi and welcome to the forum 
I like to use Carb Medic carb cleaner spray to find vacuum leaks. With the engine idling, spray it where you suspect a leak might be. If there is a leak the idle will change when it sucks in the Carb Medic.
A common place for a leak is the PCV tube at the back of the intake manifold.
I like to use Carb Medic carb cleaner spray to find vacuum leaks. With the engine idling, spray it where you suspect a leak might be. If there is a leak the idle will change when it sucks in the Carb Medic.
A common place for a leak is the PCV tube at the back of the intake manifold.
