rough idle

  1. T

    O2 Sensor mayhem / rough idle / high idle/( with pics)

    I need help troubleshooting my 2009 Ford Ranger four-cylinder XLT 2 Wheel Dr. my RPMs at idle are 850. And my O2 sensor is going from lean to rich every second I have 113,000 miles and I replaced both upstream and downstream O2 sensors and I replaced the idle air control valve and I cleaned out...
  2. T

    Tiny misfire idle driving me absolutely crazy

    So I recently purchased a 2008 Ford Ranger with 57,000 miles and the 3.0 engine and it has developed a very very small intermittent misfire at idle. More of a rough idle with a occasional hard start. I’ve done spark plugs, wires,coil, fuel filter, air filter, looked for vacuum leaks, chased a...
    • Tim karr
    • Thread
    • 3.0 fuel pump hard start low miles misfire rabbit rough idle spark plugs well maintained wires
    • Replies: 0
    • Forum: 3.0 Engine
  3. W

    Stalls when Vacuum plugs into EGR

    Hello, I hope somebody out there has enough experience to point me in the right direction. I have been working on my 1998 4 cylinder 2.5 l Ford Ranger XLT regular cab 5 speed It starts pretty rough and runs pretty rough as well. It eats up a ton of gas right now. (A quarter tank in just 30...
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