1999 Vauxhall Frontera 2.2 dth ltd. Recently had a new turbo fitted. Since then the vehicle lacks power when accelerating from 40 to 65mph. Turbo is noisy and resonates through vehicle as if is struggling once above 40. On last visit to UK, garage checked out all vaccumm pipes and cleaned EGR. French garage hopeless and very difficult to get them to understand the problem. My suspicions are pointing to the exhaust side of the turbo as sometimes it sounds as if the exhaust has blown. Otherwise vehicle drives OK but lost that smoothness.
PS hell of a lot of white smoke when the old turbo blew this happened twice as I had to get it off the road for breakdown pickup.
Take the inter cooler pipe of turbo and try to move the fan or bolt inside the turbo, if you can then theres a problem with the bearing probably oil starvation parts of the fan will have been sucked through the engine so this could cause the smoke problem if the plastic is stuck in the exhaust valve check all oil lines and air lines, try getting some one to hold rag over exhaust pipe and look in engine bay if you can see smoke/exhaust gases coming from turbo unit then theres a leak somewhere,
its a complicated problem and without being there i cant really help anymore than that, sorry jezza
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