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Matt, Mechanical Engineer
Category: Jaguar
Satisfied Customers: 22907
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Got 2009 X type 2litre diesel. There is no turbo response until

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Got 2009 X type 2litre diesel. There is no turbo response until 1750 rpm then off she goes. Is this normal ? I also run a 09 mondeo diesel same engine but its much more responsive. Actuator ? vnt ? egr ? or dare I say turbo fault.
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hello this isn't right by 1750rpm the engine should be on boost and you should have plenty of powerso I'd first check all the high pressure hoses post turbo/s for any split hoses or cracked metalpipes, also check the ends of the intercooler as its not unheard of to pop the end caps off under high boost. If this is OK thencheck the small vacuum lines to the turbo and its connected control solenoid onthe bulkhead, any cracks or leaks can give turbo issuesAlso have a feel around with your bare hands with the engine running to see if you can feel any escaping gas under your touch. Another method is to use a soap and watersolution sprayed onto any suspect areas - if there's a leak it'll bubble up with the engine running Also check that the vacuum hose running to the dump /turbo bypass valve is intact with no leaks as if the dump valve is opening prematurely you'll be losing all your boost If this is OK then remove the high pressure intake hose after the turbo and have a feel of the turbine wheel - there should be no play radially at all -but a little bit of axial / end to end float is normal
Matt, Mechanical Engineer
Category: Jaguar
Satisfied Customers: 22907
Experience: BEng hons Mech engineering, in auto industry 22 years
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Customer: replied 2 years ago.

Hi Matt Thanks for your reply to my Jag turbo problem. This week all turbo pipes have been checked and all OK and I forgot to add there is no black smoke. I also had the computer diagnosed no faults this I assume will cover injectors and actuator etc, The car came from a city home so it has been suggested it has probably not had a good thrashing for quite a while. The next opinion was because it can from a city its possible the Cat is blocked or the turbo is carboned up. Whew


yes its quite possible the cat is blocked up or the vanes on the turbo are stuck

you can check the cat condition by removing the oxygen sensor and view the cat brick for any signs of irregularity or melting

if this is OK then disconnect the actuator and try moving the vane arm by hand as it should move easily, if it doesn't then remove the exhaust downpipe from the turbo and flood the interior of the turbo with penertrating oil
Customer: replied 2 years ago.

Matt Thanks for that I will try all suggestions and keep you posted. Bill

understood Bill

just get back to me on this post


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Customer: replied 2 years ago.

HI Matt I have rated your answer. The current state of play with the Jag is finding time to spare it to investigate cat/turbo. Everybody is baffled but at least we know what is NOT causing it. Bill