2001 Explorer Won't Idle

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sharondawn - 21 Feb 2006 17:29 GMT

2001 Explorer - V6 - Will not idle on cold mornings. Have to keep
accelerator depressed until going. Dies when you slow down (red lights,
etc.) Has rough idle at times, but engine not missing. Runs great after
warming up. Replaced TPS (Throttle Pressure Sensor) and IAC (Intake Air
Control Sensor), did not help. Only does it when cold weather and engine
cold. Just did tune-up, plugs, wires, etc.

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JohanB - 22 Feb 2006 04:26 GMT

which v6???

If SOHC you will need new intake gaskets

No check engine light ?????????

> 2001 Explorer - V6 - Will not idle on cold mornings. Have to keep
> accelerator depressed until going. Dies when you slow down (red lights,
> etc.) Has rough idle at times, but engine not missing. Runs great after
> warming up. Replaced TPS (Throttle Pressure Sensor) and IAC (Intake Air
> Control Sensor), did not help. Only does it when cold weather and engine
> cold. Just did tune-up, plugs, wires, etc.

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sharondawn - 23 Feb 2006 02:27 GMT

2001 Explorer is 4.0 SOHC. No check engine light on. Replaced IAC and TPS,
but still idles rough when cold. Waiting to see if it will idle smooth
when it turns cold again. Was informed by previous owner he cleaned out
the MAF and intake and this worked for him for awhile. Maybe we should add
this to our maintenence list???

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JohanB - 23 Feb 2006 05:00 GMT

Spray carb/t-body cleaner in lower intake area and see if the idle changes

If so, you need upper and lower intake gaskets

> 2001 Explorer is 4.0 SOHC. No check engine light on. Replaced IAC and TPS,
> but still idles rough when cold. Waiting to see if it will idle smooth
> when it turns cold again. Was informed by previous owner he cleaned out
> the MAF and intake and this worked for him for awhile. Maybe we should add
> this to our maintenence list???

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kstewa00 - 26 Feb 2006 15:19 GMT

Good morning,
Before you go to crazy, this problem could be as simple as an
"engine coolant temp. " sensor. the "ECT" tells your vehicles computer
when the engine is cold, at this point the ecu (engine control module or
computer) will advance the timing on the engine for cold idle. this could
explain why your vehicle runs fine after warming up. I am no mechanic I am
simply relaying exactly what I went through after replacing every fuel
sensor on my truck it turned out to be the coolant temp sensor wich was
$15.00 after 3 fuel sensors at over $50. each. GOOD LUCK

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