Hello there Patrick -
Thank you for your reply and further info - thats good.
Patrick - with the info you have provided along with the actual symptoms you describe - and knowing these issues / vehicles , I'm convinced I know what your issue is here.
Quite why the dealer has not picked up on it I dont know - though I can guess...it does just happen sometimes... Really, I would advise to either use a different dealer or a local known good garage... you would save a lot of money with the latter too if you could...
Back to the issue in hand, there is a known problem with the VVT valves on this engine...that will cause exactly as you have. In fact, Volvo did issue a fix bulletin for this fault - I will outline it as follows for you :Problem
- Lack of power.
- Sometimes Engine pinking.
- Trouble codes stored in engine control module (ECM) fault memory
- Variable valve timing (VVT) solenoid piston sticking due to metal swarf contamination.
- Remove VVT assembly from engine.
- Disassemble and thoroughly clean all components.
- Ensure all oil passage ways are clear.
- Check operation of solenoid by applying a power source.
- Reassembly and refit.
- Erase trouble codes.
Most any local good small type garage can deal with this for you Patrick - just check if you choose to use one, that one, they have the test / diagnostic equipment to deal with your car - and that two, they would know what to do as per the above... and that as I say, will save you a lot of time , money etc and get this sorted for you from what you have outlined.
Im very pleased to have helped you - Do let me know if you need anything more --
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Kind Rgds, MIKE.