1st Gen R53 Cooper S Engine bog 2000-3200 RPM

Discussion in '1st Generation: 2002–06 R50, R53 & 2004–08 R52' started by Dutch100, Aug 4, 2012.

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  1. Dutch100

    Dutch100 New Member

    Aug 4, 2012
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    I have a 2005 Cooper S with 15% overdriven SC, a coil pack, cold air intake, Detroit Tuned bypass valve. for about a year I have had a bog from 2000-3200 RPM, really bad at 3200. I thought it was from oil on the MAP-T sensor from over oiling the air filter. cleaned all the oil, replaced the sensor, but still is bad. doesn't seem to happen when the car is sitting still, but during acceleration. any ideas what it might be, no engine codes on car, almost 200K miles.
    Thank you
     
  2. Nathan

    Nathan Founder

    Mar 30, 2009
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    Welcome, to Motoring Alliance, thanks for joining.

    With that high a mileage, congrats on getting there, I'd start to suspect the fuel system. I'd run a tank or two mixed with a bottle of Techron to see if it cleans things up.
     
  3. Dutch100

    Dutch100 New Member

    Aug 4, 2012
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    Ran some Lucas in many times. Once I get past 3200 rpm it takes off like a bandit.
     

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