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  1. N

    85 3000 rpm

    I have a 85 mustang, I replaced the engine with a used engine. The idle speed goes to 3000 rpms shortly after starting, stays there until the pedal is tapped then falls to 1000 rpm for a few seconds then right back up there. I have replaced the tps, and idle motor assembly, i have tested the...
  2. N

    85 mustang 3000 rpm

    I have a 85 mustang, I replaced the engine with a used engine. The idle speed goes to 3000 rpms shortly after starting, stays there until the pedal is tapped then falls to 1000 rpm for a few seconds then right back up there. I have replaced the tps, and idle motor assembly, i have tested the...