Hi, my 1.8 1999 lean burn 7A-FE struggles on emissions, done approx 140k miles, yearly 6000 mile service by me just before MOT (plugs, oil, filters). Last year it sailed through emissions but this year failed quite badly on emissions. We replaced the Cat and O2/Lambda sensor and it passed but the guy had to work hard for it to pass by revving the nuts of it, at it for about an hour. We have had the car since new and my wife, the main driver, drives it like a pussycat and honestly never goes over