One problem related to fuel injection has been reported for the 1999 Mitsubishi Mirage. The most recently reported issues are listed below.
Preparing to go on a trip, I filled my vehicle with gas. After driving the vehicle for approximately 10 minutes I notice the vehicle beginning to accelerate then slow down. I looked over at the gas needle and it had dropped from the full mark to empty and the fuel light came on. The vehicle began to loose power. I pulled over to the side of the bridge, waited for approximately 10 minutes and the gas hand returned to the full position and the car was drivable again. This happen three times within an hours period of time. In looking at complaints over the internet, there have been several report problems of the same nature ~ reported on edmunds. Com.