anyone try one of these??

[yaris9876]

http://www.amazon.com/Volo-Performance-Power-Programmer-Toyota/dp/B004K6FNH0

wondering if they work.......

[CTScott]

There are about 100 threads on here about those type of devices and no they do not. They have a $0.03 resistor to modify the signal from MAF. It will temporarily make the car run richer, but the ECM will quickly learn and adjust to it.