I have a 2001 SE Wagon with the 2.0 ZETEC engine. When the engine is cold
it
runs very rough at idle. This can be either sitting still or if I let up
off
the gas going down a hill or around a curve. Here is the strange part...
If
I drive it 5 or 6 miles and turn it off for a little while and start it
back
up it runs a perfectly however if I drive straight home from work, about
10
miles, it runs rough at idle all the way home. I've tried new plugs, air
filter, cleaned the PCV valve, and even checked to make sure the timing
belt
was ok even though I knew that was highly unlikely. The engine has 112k
miles on it. Any ideas??