I have a 2003 RUNX AUTO 1600 toyota. I bought the car from someone 2 month ago and it was running fine. Last week I was driving in highway and then in approx. 110 KMH the engine stop running. A road technician saw that the EFI- 15 amp fuse in the panel was blown. After changing the fuse the car was OK. It happen to me 4, 5, times during 1 week.
I notice that under 90 KMH nothing happened and only when I drive above 110 KMH for more then 10 minutes the fuse blown. when I use 10 AMP fuse (using the spare fuse) it blown in approx 100 KMH. I went to toyota electrician and he start "open" the car to find shorts in the system. Its don't look like a short
please any suggestions would help

hii,
look, when a fuse is burn(inyour case it even worther, its blow) it mean that there is too much current is flowing, now you should find where it came from.

one possibility:
maybe the injector is drawing current because it's bad or the injector wiring is contaminated with something.

second possibility:
your O2 sensor is shorting the circuit.

it can be also anything else.

hope it helpful.