downshift problem
 

i have a 2002 tauras,130000 kms.It works great in town and on the highway until it comes to a hill and downshifts.It will buck a couple of times and then smoothout.Does the same with or without cruise being on.Seems like when it gets to around 3000 rpm it does this.Any ideas?

How long since a tune up including fuel and air filters?

it hasnt been that long,just last fall.everything ive seen so far seems to be pointing to the camshaft position sensor

Don't know if the rev limiter would come into play around 3000 RPM.