whistling?
CF Veteran
Joined: Aug 2010
Posts: 1,150
Likes: 1
From: Nashville, TN
Year: 1997, 1993
Model: Cherokee
Engine: 4.0L
Chances are it's a vacuum leak. Look up the testing procedure for vacuum leaks, it typically involves either smoking the system or using carb cleaner.
CF Veteran
Joined: Aug 2011
Posts: 10,489
Likes: 24
From: Nor-Cal Coast
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Agreed. I'm pretty sure your fuel pump is in your gas tank. Open the hood, and use a section of hose to your ear to locate the source, as well as looking for a line that's just off. (a vacuum line). As Snake says, there are more ways to locate a vacuum leak.
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