Use high octane fuel HOBC.
Imran bhai hobc milta hi nhi sialkot sy ik filling station per milta hy per woh b fake. Aur agar lahore jaon ga tu fill karwa lon ga per iska faida kahin ghari ko iski latt hi na lag jaye lol
are you sure its knocking?
from what you describe it sounds more like piston slap
What kind of engine oil have you been using, what is your oil change interval?
this is something youll have to live with specially on uphill (unchai pe) this is mentioned in the owners manual. Just get routine checkup on your car it might get reduced, But minimal knocking would be there on higher gears and low rpms
I was having knocking problem in rolla/11 even after tunning. I switched over to HOBC and now feel difference in pickup and knocking is reduced very much. (not fully but at acceptable level)
Snycview Bro give ur number and any one have a idea about d4d engine lanch by toyota in new model or not
Ok, then at least get your valve timing and ignition timing checked.Next carry out Tappet adjustments.
I have the same problem in my 2005corolla everyone says its either low quality of petrol or you need to get throttle body washed...i got the tunning bt no use:/
Throttle body cleaning will not solve your knocking problem.Use HOBC fuel and also check the ignition timing.