Even the slightest deviation from that sound can mean that the engine is not functioning ... that create the metallic noise that is commonly referred to as a knock. ... That is why nearly all modern car engines have fuel injectors, injector pumps, ... acceleration is going to be poor and the engine is going to make unusual noises.. How bad does that sound? sound like you got a bad fuel injector or a bad ... It would make sense that it is fuel injectors seeing how only when... d9ca4589f4 latrel