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Matt
Matt, Mechanical Engineer
Category: Ford
Satisfied Customers: 22153
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Ford Kuga 2lt tdi running perfectly, on normal acceleration,

Customer Question

Ford Kuga 2lt tdi running perfectly, on normal acceleration, just changed gear, sudden engine vibration, misfire, though no great power loss. Managed to drive to garage, no warning lights on dashboard. Engine switched off, on starting engine, obvious knocking
from engine (this may have been present before engine switched off but not heard from driving position) Garage have removed fuel injectors which appear ok on testing, Cam followers appear intact, can you suggest other any other possible cause of the problem?
Submitted: 2 years ago.
Category: Ford
Expert:  Shantal-Mod replied 2 years ago.
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Expert:  Matt replied 2 years ago.
Hello if you haven't already then I'd do a compression test across all cylinders as they all should be within 10-15 psi of each other first check all the high pressure hoses post turbo/s for any split hoses or cracked metal pipes, 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 then check the small vacuum lines to the turbo and its connected control solenoid on the 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 water solution 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 one other possibility is that the wastegate actuator spring has gone soft so allowing the wastegate to open prematurely - if your actuator has a threaded end you can increase the preload on it to see if this improves things otherwise these units are quite cheap compared to a new turbo so it may be worth trying a replacement
Expert:  Matt replied 1 year ago.
Hi
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