why does the car shake at idle...I changed the motor and trans mount and

no there is no misfire.....its tuned up.....only shakes below 1000 rpms

without performing diagnostics it's difficult to determine exactly the cause of your shaking. Sometimes vacuum leaks - which are hard to see w/o performing a smoke leak test - can cause rough idle. Have your tried cleaning the fuel system?

I have brought my mothers tracker to 3 very repratable shops sorry for the spelling in the east sacramento area how-ever all 3 shops said the same thing I dont know... they were stumped...before bringing the car in how-ever they all said the same thing...I can diagnose your car if you bring it in....needless to say I recieved 3 apologies....at least they were honest