Ford Focus Engine Surge

I Drive A 2003 Ford Focus Zx And Have Noticedthe Idle Rpms Decrease And Jump Up And Down. What Is The Normal Rpm For My Car And Is The "...

Got An 03 Ford Focus With A 2.0 Split Port Injection.changed O2 Sensors Mass Air Flow Air Filter Gas Filter Spark Plugs And Wires Pcv Valve...

When I Drive My Car On The Free Way The Engine Surges, Replaced The Ignition Sensor, Help!! No One Seems To Be Able To Find Out Why This Is...

When Driving My Car (fast Or Slow), The Car Makes A Surging/pulsating Motion. What Could Cause This?

I Drive A 2000 Focus That Just Rolled Over 70,000 Miles. I Just Took It In For Maintenance A Month Or So Ago, Everything Has Been Running...