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jbwhiton

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  • From
    Charlotte, NC
  • Porsche Club
    No
  • Present cars
    2005 Cayenne Turbo, 2008 Lexus ISF
  • Former cars
    BMW M5

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  1. I wanted to chime in and echo the similar results. I have a tune as well, and all new Denso IK20 plugs, which helped the low RPM stutter from 1-2K rpm. All new vacuum lines to the DV's. Had surging under full throttle and the idle dip as well, and a rumbling rough idle when warming up. Pulled the right fuel pump fuse and ran on the left and all symptoms were gone. Almost no idle dip, no surging, and almost no perceivable( very slight) stutter down low.
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