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Rough cold idle


Mokume1

New Member
Joined
Jan 1, 2010
Messages
1
Vehicle Year
2000
Transmission
Automatic
2000 4.0 supercab with just 62K on it.
When eng. is 1st started cold, idle is OK for maybe half a minute, then start to get rough to the point where it will almost die off, along with fuel loading.
This will happen for a minute or 2, then the idle will clear up by itself
This only happens on initial cold start, and MIL does not come on (but, yes, it does work)
Once the engine is at normal operating temperature, it runs fine
The IAC vlv. checks out OK and is clean
Can anyone offer some insight?
 
Last edited:

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