Car Mechanics (UK)

Emis­sions trou­ble

- Iceland · Jaguar · Belarus · Belgium · Jaguar X-Type

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.

Al­bert Kirby

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 flex­fu­el­com­ to clean the car­bon de­posits from the en­gine, which could re­turn the emis­sion lev­els to within the per­mit­ted limits. JAGUAR X-TYPE

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