Hello,
I am facing a persistent knocking sound from my car’s engine when accelerating from a stop. The noise is more noticeable when the engine is under load; like going uphill / accelerating quickly. 
I have already checked the spark plugs and cleaned the fuel injectors; but the problem remains. I am wondering if it could be related to ignition timing; a faulty sensor; or perhaps something else like carbon buildup in the combustion chamber.
Has anyone faced a similar issue? What steps should I take to diagnose the problem further; and what potential solutions should I consider? I have checked https://www.pakwheels.com/forums/c/technical-forums-msbi reference guide but still need help.
Any advice from experienced members would be greatly appreciated!
Thank you!