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Thanks Andy for sharing the detailed report as it would be useful for anyone else who is experiencing the same issues. I don't think it does any harm to internally clean some components due to carbon build up and degrading seals and gaskets. I think we are yet to see how the increased Ethanol in fuel will affect the older vehicles particularly when it comes to seals and gaskets - only time will tell. Look forward to the updated reports

Well the clean up of throttle body improved the performance and the idling is a bit better. I have invested in a new fuel filter as apparently it can give the same symptoms that i am suffering with at the moment. So at some point tomorrow afternoon, i will swap them over and see how it goes. WATCH THIS SPACE FOR NEWS ON THE OUTCOME.

Hi I had the same problem and its very common issue with the grandland. The wiring loom can't take the load Apparently. I think the wire overheats and causes the wiring to fail. I had the garage look at it and they upgraded the wiring at a cost of £150. Hope this helps

Thats strange, i went vauxhall they said its the MAP sensor on inlet manifold.... ive check the 4 pin wiring all the way to the ECU its all good, just waiting for new MAP sensor come to see if it is that

Well I removed the throttle body and gave it a good dowsing of carb cleaner. It was very Carboned up below the butterfly. I'm going to give the EGR a clean out too. And hopefully it will be a good cure.