**Update**

I finally had a chance to take the truck for a longer drive so here are some results:

Gas mileage increased by approx 2mpg (90% highway), the only other thing I did along with the injectors was to clean the throttlebody and upper intake plenum. For my case this means that simply cleaning the injectors gave me about a 10% increase in fuel mileage. Also I found that there is a definite increase in power, nothing mind boggling, all the major hills still required the same downshift, but now I need about 10% lower throttle setting for the same speed. Power on the highway is definitely smoother, especially at mid throttle settings.

To Summarize:

My truck : 86 4runner SR5, 22re, 5spd, 198k, recent tuneup (plugs, wires, cap, rotor, airfilter, timing adjust) all about 3k miles ago. 31x10.50's A/T's with about 5k miles on them.

Modification/Adjustment: Injectors cleaned by RC Engineering, cleaned throttle body and upper intake plenum. Did not adjust or remove TPS.

Cost: $115 for four injectors with return shipping (3 day) to Northern Idaho, total cost minus shipping was $96 for four injectors.

Results: Estimated 2mpg increase in fuel mileage (at 90% highway mix). Definite improvement in idle and general smoothness. Noticible improvement in highway performance.