cold high idle, then dies..... | Ford Explorer - Ford Ranger Forums - Serious Explorations

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cold high idle, then dies.....

kuch73

New Member
Joined
May 14, 2006
Messages
7
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City, State
NY
Year, Model & Trim Level
1999 Explorer 4.0 SOHC
Hello all, I have a 99 Explorer 4.0 SOHC, when first start on a cold day, the engine would idle real high, like 2300rpm for about 5 minutes, then die. I have installed a new ECT sensor, when I did the 00M12 gaskets. This problem is intermittent as well, so I do not suspect a vacuum leak. Any other ideas, FPR, fuel filter, etc... Thanks
 
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llamaking122

Well-Known Member
Joined
November 21, 2010
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City, State
Worthington, OH
Year, Model & Trim Level
2000 Mountaineer V8
have you tried cleaning the Idle air control?
 
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RoCkrMAN

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October 13, 2010
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City, State
TN
Year, Model & Trim Level
1997 Ford Explorer 5.0L
Temp sensor fixed my 5.0 it would idle high then low till it died. And its not the sensor for the gauge its the other temp sensor.
 
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kuch73

New Member
Joined
May 14, 2006
Messages
7
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City, State
NY
Year, Model & Trim Level
1999 Explorer 4.0 SOHC
Yes to both....

I installed a new ECT sensor, direct from Ford, and have cleaned the IAC valve. It still has the old IAC valve, just cleaned, hoever, I have tried 2 other used IAC valves and same random high idle. Any other ideas? Thanks
 
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