I'm helping a neighbor out with a 94 Diamante sedan. He says he's getting an intermittent check engine light, the car runs like it has a miss and the vehicle failed an emissions check. I was wondering if there was a website that listed the ECU codes for a Diamante. I already replaced the fuel filter, wires and plugs. the emissions check station ran some injector cleaner through the car, after it failed the first time. Still misses, and still pops off an intermittent CEL. Thanks.

Check this out: http://www.troublecodes.net/mitsu/

I think you'll be pleased.