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rough running

  1. Idle erratic and variable

    Troubleshooting
    Hello! 1995 Z-28, K&N, Borla, otherwise stock. Distributor, wires, and plugs replaced in last 18 months. Slowly (over a couple months) developed a higher and higher idle. Now when warm, idle will "stick" at 2K+, suddenly drop to normal, then climb back up OR SES light comes on. Codes EGR, 44...
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