Originally Posted by
RubberCtyRauder
car can not run on 87 octane, will knock and ping. needs 91 minimum, you may be hearing injector tick, common, can you get a video of sound on phone and post it?
This^
It’s considered high compression, therefor needs a better octane.
Is the knock at the bottom, top, or front? There is plenty of noises to these engines that are common from birth. Some cars more noticeable, but doesn’t always mean there is a problem. The injectors can click loudly, valve components, timing chain slap/weak tensions, even just the belt tensioner can make a racket mimicking a knock.
Only thing that concerns me is you have a fault code pointing at a certain cylinder and your claiming a knock. I would run a compression test at minimum. It’s a good way to get to know your car and it’s health. I wouldn’t normally worry about too much parts wise at your mileage. Sure there’s been plenty of issues with even less mileage, but a great deal more of nothing.
My stock engine and trans was removed at 92,500 in perfect health even being supercharged since 48,000.
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