Contour Enthusiasts Group Archives Forums General Troubleshooting Studdering when accelerating

This is exactly the problem I had when using BOSCH plugs. As soon as I changed them for Motorcraft the problem went away and the car ran much better.

Then the problem came back a week or two later and I discovered a wire had worked loose. It didn't want to hang on tightly to the plug anymore so I decided to change the set of wires.

It been working perfect since.

I agree. Try plugs first if that doesn't work you need to try new wires. These items are fairly cheap & need to be replaced every once in a while anyway.

-Aaron