I recently replaced the starter on a 98 pontiac grand prix gt. the old turned out not to be bad but was extremely loose. the next day the car developed a loud knocking soundin the motor. my intial thought was the starter i replaced it with was bad also and making contacting with the fly wheel. replaced it w/ old starter and problem continued. I checked the fly wheel and could not find any noticable cracks so that leads me to think maybe the engine has a broken rod. car cranks and still idles and has power in the motor however on acceleration the knocking speeds up also. the sound could be described as a wrech thrown in a metal bucket and shook. anyone have a guess what could be causing this problem. is there a simple way of telling if it is a rod? thanks.....
Aug 31, 2009 at 11:38 PM