4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

High rev start then dies

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Old Nov 29, 2018
  #1  
Posranger's Avatar
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From: Maple grove mn
Icon4 High rev start then dies

I have a 2003 Ford ranger xlt 4x4 203k on it
i got in it and tried starting it and it started but it went straight to 4000 rpms then it went all the way down and died. It seems to have a misfire. When it’s in gear it runs okay I guess you could say but only above 2000 rpms. I tried idleing it and it just dies. It has no codes. Please help as this is my daily driver and I have to fix it quick.
 
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Old Nov 30, 2018
  #2  
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From: Vancouver, BC
Welcome to the forum

If 4.0l SOHC then check PCV hose at its elbow, common issue on these, vacuum leak is causing high rpm and misfires
 
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