fuel filter, you may not have one, but if you did it would be in front of the drives side back tire.

vac leaks, take a can of carb cleaner, and spray the vac lines area by area, and the sensors they plug into, ans well as around the TB, if the idle jumps up, you found your leak area.

if you find nothing, try lifting the vac lines or shifting them around when spraying the carb cleaner at them.