My 1998 Freelander 1.8, with 68,000 miles and full service history, failed its recent MoT on emissions. I tried Cataclean and Forte treatments in an attempt to clean up the catalytic converter, but it was no better. I then fitted a new catalytic converter and the Freelander went through the MoT. This is the second year in a row I’ve had to fit a new cat to get the Freelander through the test. The only change this year is that the exhaust gas smells strongly of petrol in addition to the high emissions reading.
I’ve run diagnostic checks with my Sykes ACR4 and my Launch X-431 but nothing is out of parameter, and the engine always starts first time.
Stephen Haywood, Cornwall
Any vehicle registered after March 1 2001 needs to have a type-approved (103R) catalytic converter fitted. Vehicles made before then can have anything on – and there are some rubbish cats about.
I have had several vehicles through for MoT that have needed a new catalytic converter every year to get them through the emissions.
You say that the engine sensors are all within the correct parameters, I assume that the lambda sensor is switching correctly? The engine temperature and lambda readings are the main contributors to fuelling levels. I would not expect to smell petrol from the exhaust if only the cat was faulty.