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Crazy idle and AFR fluctuations, no cel

Discussion in 'Issues, Repairs, Warranty, TSB, Recalls' started by Dave9878, Jul 29, 2020.

  1. Dave9878

    Dave9878 Member

    First Name:
    David
    Vehicle(s):
    2018 Mustang GT PP1
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    Hey all, today when I started my car I began having insane idle fluctuations. It’d dip to 600 then surge to 900 and go back and forth. My afr and vacuum gauge also moved with the fluctuations. I am curious if anyone has had this issue. I’m thinking it’s the evap purge valve. I have no cel, then if it is the evap purge valve, where is it’s location on the 2018 GTs? I know the 15-17 has it above the throttle body. Thanks.
     
  2. OP
    OP
    Dave9878

    Dave9878 Member

    First Name:
    David
    Vehicle(s):
    2018 Mustang GT PP1
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    Bump
     
  3. Diocletian

    Diocletian Well-Known Member

    Vehicle(s):
    2018 Orange Fury Mustang GT Premium A10 w/ PP1. 2006 Toyota 4Runner SR5
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    Definitely a vacuum leak. Check near the airbox and all hoses. I uploaded a pic I found that should help a little Vacuum Lines.png
     
    steveo1960 likes this.
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