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Stock 2002 - 2005 Explorers Questions related to non-modified 2002 - 2005 Explorers and Mountaineers. Problem solving, maintenance, TSB, service bulletins, owner reviews, specifications. Sport Trac and Sport use the 1995-2001 forum.

Vacuum leak 2004 ford explorer

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Old 09-14-2009, 04:28 AM   #1
top detailer
94 & 04 XLT
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Vacuum leak 2004 ford explorer

Hello ford forums,

I have a 2004 ford explorer and recently the service engine light(SEL) came on. also, my idling is very rough, but drives normal at regular speed. I took it to auto zone to get a code reading. I got P0174 code, which means leans bank 2. I've replaced the intake gaskets, cleaned MAF sensor and replaced an 02 sensor, the problem still exists. Can anyone tell me where the vacuum hoses are located? I believe I have a vacuum leak, I here a hissing noise when I take off.
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Old 09-14-2009, 10:20 AM   #2
Kailua, Hawai'i
'02 Limited 4.6L 4x4
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Look all around the top of your engine. Most of those hoses are vacuum hoses.

Wife's: '02 Limited 4.6L/4x4
Mine: '04 Mustang GT Vert, 2006 C6 Corvette Coupe
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Old 09-15-2009, 08:50 AM   #3
Fox Fader
Columbus, GA
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Don't let that light hiss sound fool you, it's quite common.

2005 XLS 115k not even side steps (sold)
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Old 09-21-2009, 09:34 AM   #4
Endicott, NY
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Look for a bad / soft rubber elbow fitting in vacuum line. Common problem with V8.
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