Wont Idle

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Jan 12, 2004 | 11:21 AM

jjames1967

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Joined: Oct 2003

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Wont Idle

Guys,

I have a 1999 5.4 XLT Expedition. This weekend I got in and started it, it then died. The only way I could keep it running was to give it gas. Anyone know what could be the problem?

Thanks

Jeff,,

Jan 12, 2004 | 01:48 PM

BigMan69

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Joined: Jun 2003

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From: Long Island, NY

IAC Valve is bad and needs to be changed. They are notorious for going bad about the 50,000 mile mark. If you take off the black plastic 5.4 cover, and look towards the firewall on the passenger side, there will be a silver cylindrical part attached with 2 bolts. That is the IAC (Idle Air Control) Valve. How many miles you have, by the way???

BigMan69

Jan 12, 2004 | 01:53 PM

jjames1967

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That sounds like it from what I have been reading. It has 46K.
This site is awesome, always find what I'm looking for.

Thanks

Jeff,,

Jan 12, 2004 | 02:04 PM

Italian Expy

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Joined: Jun 2003

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From: Beale AFB, CA

Had the same problem last summer. A friend of a friend is a dealership mechanic and he advised me to take the IAC off and blast it with carb cleaner before purchasing a new one. It's been running fine since. Might as well try it if you are going to replace it anyway.