360 glt pinking and running on
can any body help.my 1984 glt has just suddenly started to pink and run on after ignition is turned off.strange thing but when you floor throttle at up to about 2500 rpm no pinking. pinking only starts at about 3500 rpm when pulling hard.halfway through tank of petrol that is was running fine on,and have checked all settings,replaced plugs etc etc etc.no air leeks and ig timing ok.car also has BROCQUET DEVICE FITTED.Car is a bit jerky at slow speeds and sounds different,and is very ritch on tickover.Help please,TONY 360 GLT.Thanks.
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