1999 Buick Century Q&A
1999 Buick Century Question: What do make the knocking noise in the engine when you give gas?
To many possibilities, a mechanic really needs to hear this noise to be able to make a diagnosis. - pushrod
Have it checked by a knowledgeable person that can hear what kind of noise it is. It may even be an octane ping that sounds like a knock to you. May not be the engine, but maybe the gas you are using. Just a thought. - ProfessorG
Timming gears....going bad need replaced.. - warrior.of.god86