Exhaust Sound Change after 4000 rpm | FerrariChat

Exhaust Sound Change after 4000 rpm

Discussion in '360/430' started by Emanuele Arguelles, Jun 22, 2022.

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  1. Emanuele Arguelles

    Emanuele Arguelles Rookie

    Jun 29, 2020
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    Manny
    #1 Emanuele Arguelles, Jun 22, 2022
    Exhaust sound change after 4000 rpm ?
    I have had my car for 2 years and always noticed a different sounding pitch when drive over 4000rpm, all the sudden may car doesn't do that any more? Anyone else have this happen?
     
  2. btshat

    btshat Karting

    Jun 10, 2021
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    Iowa
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    Brian
    #2 btshat, Jun 22, 2022
    Sounds like your exhaust valves are stuck closed. The sound changes when the valves open up. I believe those are vacuum operated, so you may have a vacuum leak.
     
    Qavion likes this.
  3. Ferrarista98

    Ferrarista98 Formula Junior
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    Jan 7, 2018
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    Jason L
    #3 Ferrarista98, Jun 22, 2022
    Yup exhaust valve not opening
     
  4. Some Guy in the sky

    Some Guy in the sky Formula Junior

    Sep 19, 2018
    347
    #4 Some Guy in the sky, Jun 22, 2022
    I just had to replace an exhaust solenoid valve (#178309) because of similar issues.
     
  5. Emanuele Arguelles

    Emanuele Arguelles Rookie

    Jun 29, 2020
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    Manny
    #5 Emanuele Arguelles, Jun 22, 2022
    Thanks for the replies!
     
  6. Qavion

    Qavion F1 World Champ
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    Feb 20, 2015
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    #6 Qavion, Jun 22, 2022
    There are two valves. They are each controlled by their respective Left/Right engine ECUs using solenoid valves. The solenoid valves have independent electrical power sources. You will have to figure out if one or both are not operating.

    Vacuum is probably the only thing they have in common.

    Did you not get any warning lights on the dash?
     
  7. CoreyNJ

    CoreyNJ Formula 3
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    Apr 17, 2006
    2,029
    New Jersey Shore
    #7 CoreyNJ, Jun 23, 2022
    Maybe he could manually wire, not electrically but actually some wire to hold the arms on the actuator open to see if the car is louder at idle. If that works, then he can see if there is an issue with the vacuum, solenoid, or the valves themselves.
     

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