Stock 5.0 what should vacuum be at idle?

Discussion in 'V8 5.0L Engine / Mods: Bolt-ons, Exhaust, Tuning' started by z6cyl, May 9, 2020.

  1. z6cyl

    z6cyl Well-Known Member

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    I'm at 16 with AC and 17 without AC (not sure if this matters but I'm at altitude). This seems low?

    I did clean the MAF/MAS already, it's the same.
     
  2. Cory S

    Cory S Well-Known Member

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    At full operating temperature idle with no HVAC/accessories on, I see 17-18” of vacuum on my Auto Meter Pro-comp gauge.
     
  3. OP
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    z6cyl

    z6cyl Well-Known Member

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    thanks Cory
     
  4. Cory S

    Cory S Well-Known Member

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    No problem!
     
  5. zero_chance

    zero_chance Dismember

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    Lordy. I’m sub 20 at idle usually around 25 here in AZ.
     
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