Toyota Repair: rough idle, spark plug wires, 1990 toyota camry

Question
idle's rough. replaced fuel filter, ignition coil,
throttle position senser, checked temp sensor, ox. sensor vaccum hoses. all ok.
put injection and throttle body cleaner in gas twice, still rough idle,\. ?
1990 toyota camry 4 cyl.fuel injection..

Answer
Rough idle can be caused by an engine misfire or a vacuum leak on the intake system, the misfire could be caused by a bad spark plug, a cracked distributor cap, leaking spark plug wires or low compression on one or more cylinders.
Another type of rough idle can be caused by a non-electrical source such a leak anywhere on the intake system, this tends to create an erratic idle rather than a misfire, check all these things and if you still have the problem get back to me but be very specific about what was done to attempt to fix the problem.