 New member with a problem
I have a 99 Escort wagon with an intermittent problem. Engine runs rough, but this state of affairs comes and goes. I have replaced fuel filter, plugs, plug wires and coil, but problem persists. It's okay under acceleration but runs rough while cruising or idling. Sometimes it will run rough at one speed and fine at another speed. My mechanic doesn't have a clue.
Any ideas? | 
