Engine Drivetrain 1st Gen Cooper S Rev hang got worse

Discussion in 'Tuning and Performance' started by Tummi_Gummi, Jun 24, 2014.

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  1. Tummi_Gummi

    Tummi_Gummi New Member

    Nov 19, 2012
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    I pull my sc replaced all gaskets in the process. I noticed my vacuum hose to the throttle body was getting frail and brittle. Then a couple weeks later I installed my ns1 cam. Which woke the car up a lot. I installed a new chain tensioner which I got from the dealer and since then have had issues with revs hanging. Especially in 1st. It sounds terrible like I'm not letting off the gas. The revs will jump 3 to 400 rpm up
     
  2. Dave.0

    Dave.0 Helix & RMW Powered
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    May 4, 2009
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    Try replacing your MAP and T-MAP sensors if they are old.
     

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