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Engine revs high then drops and then stalls

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Old Apr 9, 2020
  #1  
Rangerman101's Avatar
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Engine revs high then drops and then stalls

So I have recently replaced my valve cover gaskets on my engine and I go to turn the key and my car is idling at 2500 to start then slowly drops down to 1000 at this point it’s is a hard idle then soon after it stalls.
im also not getting any codes
I have a 1998 4.0
 

Last edited by Rangerman101; Apr 9, 2020 at 07:27 AM.
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Old Apr 9, 2020
  #2  
RonD's Avatar
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From: Vancouver, BC
Check PCV Valve, you can pull off its hose and plug that hose to see if engine starts and idles normally

 
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