Help with Mazda 929 Idle..?

My parents 1989 Mazda 929 revs when you first warm it up in the mourning. Our mechanic said its the idle. This problem occured after our timing belt broke while driving and the car broke down. The mechanic put in the new belt and the kicking problem started. While driving, the car starts to kick at around 35-41mph. Is this also from the idle? All this occured after the tiiming belt was changed. What could be the problem? Is it really the idle.. if so where can we get it? Thanks

Go to www.mazdarecycling.com or call them for the vavle. The 929's share a common problem with the air valves. They can fix you up.