I have a 1992 Japanese import with a 660cc F6A engine. Where I live, there's pretty strict emissions standards and my Jimny won't pass. My CO emissions are almost 4 times the max allowable. My mechanic friend thinks it's burning too much fuel and unburnt fuel is getting through to the exhaust system. Given my mileage isn't what I think it should be, he might be right. He was wondering what fuel injection system it uses. Any ideas?