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1997 - 2006 Expedition & Navigator 1997 - 2002 and 2003 - 2006 Ford Expedition and Lincoln Navigator Discussion

two hopefully minor issues here....

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Old Sep 28, 2012 | 12:24 PM
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rwinsouthla
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two hopefully minor issues here....

Newbie here with two hopefully minor issues you guys may be able to help with. The first issue is my 2006 Expedition XLT 5.4L idles at just below 500 rpm. Sometimes, with the AC on, it goes a tick lower and bobbles between 425 or so and 500 and just feels like it will stall on me. What should it idle at and how to increase the idle?

Second question is my gas pedal, but that's not really it. When I push the gas pedal, i know it pushes a linkage to increase the fuel delivery to make it accelerate. Up until 5000 miles ago or so, it was a smooth acceleration, smooth pedal, and I could feather it down ever so lightly when I accelerated from a stop. Now, I have to push the pedal down 1-2 inches prior to any response. I feel like it is a linkage issue between the pedal and the throttle linkage, but am unsure. Is there somewhere I can shoot some WD-40 and if so, where?

Thanks in advance, ray
 
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Old Sep 28, 2012 | 10:54 PM
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Sounds like it may be time for a new throttle position sensor and a iac cleaning
 
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Old Sep 29, 2012 | 12:28 AM
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Thanks for the reply. I've now been educated on the TPS. Can you tell me what IAC is?
 
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Old Sep 29, 2012 | 10:55 AM
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Idle air control. It's a small valve that controls engine idle. When it gets dirty the truck starts to idle freaky
 
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Old Sep 29, 2012 | 11:18 AM
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Your '06 doesn't have an IAC. Did you check for codes?
 
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Old Sep 29, 2012 | 10:36 PM
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No. I didn't check the codes. The check engine light is not on.
 
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Old Sep 30, 2012 | 01:41 AM
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There are codes (regular and pending) that can be set without turning on the CEL.
 
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