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Mk1 Gs300 Engine

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I noticed today when out in the GS when going up a fairly steep hill my engine seemed to be 'pinking'.

Its definitely throttle related as the harder I accelerated the worse it seemed to get. It was a very hot humid day and I had just completed a fairly spritely 150 mile trip on mainly 'A' roads.

The car is regularly serviced but is due a cam belt change and has covered just over 115,000 miles.

Anyone know what the noise might be?

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All I can suggest is that if it happens again you change down to a lower gear manually in case your auto box wasn't responding correctly. That might give a clue as to where your problem lies. Sorry I can't be more helpful. Hopefully it isn't anything too serious.

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