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high idle

  1. High Idle

    New Member Introductions
    My 1999 F150 4.6L, 5 spd, original owner 140,000 miles continues to have high idle issue for 2 months now. Throttle body is clean, replaced TPS, pcv , checked vacuum leaks, replaced two vacuum hoses, replace IAC valve with aftermarket and still no change. No code or check engine light. Finally...