I have had fuel injector changed,and I am using higher octane fuel. It stalls/knocks after engine has been warmed up. Diagnostic came up no error codes,but I still have problem.
get the lower grade gas if your car is not specifically made for the higher octane fuel. this could be bad because it could have messed with your catalytic converter which can back up exhaust into the engine, and can be pretty costly to repair being that is has precious metals in it.
