One problem related to emission control has been reported for the 1999 Mitsubishi Eclipse. The most recently reported issues are listed below.
Took car to dmv and it won't pass obd-ii test. I have tried three times. Found out that a TSB-03-13-005 was sent out. Which states how to reset so you can pass the emission test. If you disconnect your battery you computer won't reset till you take it to the dealer who charges you hundreds of dollars to reset a problem that they know about but refuse to correct. So every time I need to go to the dmv I first need to visit the dealer so that he can rip me off, and bypass the emission system. Again they know of the issue they posted the TSB 03-13-005. Won't buy or recommend a Mitsubishi Eclipse again.