It's not your vehicle combustion chambers. It is lifters. Has none to do with combustion chambers. You do not have piston slap, it's no GM truck.wow some wonderful input.
well tell me if im doing something wrong here first off im gonna revert fuel from 95 to 90 and change oil to 5-20 or should it be higher and lastly im gonna hav my combustion chamber cleaned professionally and take out that nasty carbon deposit out of the engine.
any other suggestions.
OP, don't waste time and money. Not a single professional will clean lifters by pouring half a can of solvent down the fuel line. Cleaner must be IN OIL, or lifters must be removed.
We already told you before - why do you keep running car that is made for 87 grade gas on 95? But see, high octane knock would have been there all the time, not just at cold start.