I have a 99 expedition with the 5.4 motor. It idles rough and dies like running out of gas.

Asked by Sep 01, 2012 at 09:48 PM about the 1999 Ford Expedition 4 Dr Eddie Bauer SUV

Question type: Maintenance & Repair

I have a 99 expedition with the 5.4. It just died and when starets wont idle or idles very rough. When giving gas it dies. I ahve relplaced the fuel filter. Any suggestions

4 Answers

105

there are a wide range of possibilities but the Idle air sensor on the upper intake plenum could be the problem.

2 people found this helpful.
10

Coil Pac for SURE!! I've been the NOT so proud Owner of a 2003 Expidition and That has been the only oain in my A@@!! Check with an OBD Code Reader. You can buy it at Auto Zone for $60.00. Tells which one is malfunctioning. Good Luck! Sabrina

1 people found this helpful.

The same thing happen to my 2000 expedition 5.4L. I replaced the Idle Air Control Valve and the problem when away. When the Idle Air Control Valve is clog or broken, it does not allow enough air in the engine, causing the engine to idle rough and die.

I have a 2001 Eddie Bauer Expedition, and had this same issue,so I replaced the Idle Air Control Valve, didnt work. Checked and replaced ALL the coil packs, didnt fix it. What did fix it very well was I replaced the Catalytic Converter and now it runs fine. Funny, it was the cheaoest part too.

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