Acceleration shudder over 65mph

Discussion in 'Generation 4 - Maintenance & Troubleshooting' started by hawkfandan, Feb 22, 2021.

  1. hawkfandan

    hawkfandan New Member

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    Have 11 SHO. Have replaced plugs, wires, boots, most coils and all the fuel injectors.

    I recently had a cylinder 3 misfire and changed the coil and plug (the plusg a 2nd time) and yesterday my cel went off is when doing.a hard acceleration over 65 (up a hill.or passing).

    Mainly had done all city driving since the aforementioned plug replacement.

    Car shirts good, drives good otherwise no issues with acceleration.

    I've spent thousands trying to get it right. I need some ideas what could be wrong!?!
     
  2. luigisho

    luigisho SHO Member

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    swap the #3 coil with another and see if it follows. It's always possible to get a replacement that isn't as good as you would think. After that if it keeps being same cylinder specific then there is either a fuel, vacuum issue, or something with the circuit firing the coil or a cylinder internal specific issue. The easy stuff has been done it looks like.
    To get better responses you need to post this in the Gen 4 section that is specific to the newer turbo models of SHO. This section is the early non turbo cars
     
    Last edited: Feb 22, 2021
  3. hawkfandan

    hawkfandan New Member

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    I'm sorry I thought I posted it in right section
     
  4. Irish Pride

    Irish Pride Irish Inside Staff Member Super Moderators

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    Moved to proper section.
     

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