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1997 Ranger Lunges after hot start


Harrisburger

Member
Joined
Jul 3, 2012
Messages
9
Vehicle Year
1997
Transmission
Automatic
Hey guys,

My 97 4.0L has developed a problem over the past year where it will idle roughly- and therefore lunge at idle when the transmission is in gear- when you re-start it while the engine is still hot. Never does it when the engine is cold though. It settles down after about 15 seconds and then begins to idle normally.

I don't have any CEL's, I have replaced the IAC motor and cleaned the butterfly valve and throttle body. Any other ideas? Thanks!
 

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