Car Mechanics (UK)
My 2009 Jaguar X-TYPE 2.0D has failed the MOT on an emission range from 2.79-4.07. The turbo was changed five years ago, after a refurbished one failed when the seals went in just over a year. This was changed partly under warranty. My garage is evasive as to what the problem might be without testing further – which would cost me more money – mentioning the EGR valve, injectors, turbo and swirl flaps, even though this car doesn’t have swirl flaps! In the past I have removed the intake, so I know there are no swirl flaps. There is a slight leak, but I am not sure if it’s a turbo leak as the turbo doesn’t whine and I can see that the actuator is working. Any ideas on why the readings are so high? Would the EGR valve or injectors cause this?
Also, when I accelerate hard up an incline there is a puff of smoke as the turbo comes in, then it doesn’t seem to happen again.
Without seeing the full range of figures from the test, it is difficult to pinpoint a cause, but generally a fault in the EGR system or a weeping or faulty injector would be the most likely culprit with your X-TYPE. Cleaning the EGR valve may be a good start, as would trying an additive in the fuel tank and giving the Jaguar a good run. If the vehicle is only used for urban driving, the systems may become clogged with carbon. In these circumstances using an additive accompanied by a good run may bring down the emissions to an acceptable level. Another option would be to use a service such as flexfuelcompany.co.uk to clean the carbon deposits from the engine, which could return the emission levels to within the permitted limits. JAGUAR X-TYPE