Car Questions
RepairPal is your advocate for car care advice and guidance

Two days ago my car had a couple of misfires. Checked it and the code was P0303.

(2004 Ford Taurus)
in Parksley, VA on February 01, 2014
After getting code it said it misfired on 3rd cylinder. But while I drove home the day that this happened, the engine light came on, that's how I got the code. I had new motorcraft plugs and wires installed. Now the car is idling too fast, then drops down and goes up too high again. Can anyone help me?
Displaying 2 answers & 0 comments
Popular Answer
on February 01, 2014
Vacuum leaks are common on this engine! That will cause the rolling or fluctuating idle.
on February 01, 2014
Reset computer and drive it 3 miles..
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more
Didn't find what you were looking for?