Need Help Diagnosing Rough Idle and Stalling


Joined
Dec 17, 2025
Messages
3
Points
1
City
Lincoln
State - Country
NE - USA
Vehicle Year
1997
Vehicle
Ford Ranger
Engine
4.0 V6
Good Morning

I have a'97 4.0 4x4 w/ 100k miles that has surging idle and sometimes dies when coming to stops/shifting from D to R. I have replaced the vacuum lines, TPS, MAF and IAC. None of these have significantly fixed it. It does run better when the MAF is disconnected. I have also watched O2, and fuel trims and they are very similar between bank 1 & 2. I also have a lean code for both banks. Any help would be great!
 

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