most likely one or more of your car's engine's cylinders is misfiring. this will throw the engine off balance. it could be that the mass airflow sensor isnt working or the spark plug or distributor could be malfunctioning. also if you use fuel with a low octane rating in a car that was made for a higher octane fuel it could cause the knocking. what fuel do you use?
darkside Reviewed by darkside on . car experts, help me out...my car is shaking i drive a 2000 nissan maxima SE automatic. lately when between 600 (idle) and 1200 rpm my car starts shaking/chugging/hesitating...whether in gear or in neutral. when it gets above about 2200 rpm the chugging goes away. the chugging is at its worst when i'm in 4th gear travelling around 37-40 mph and at 1300 rpm or so. when i turn on the a/c it gets worse...the chugging gets stronger and slower. when i turn off the a/c it gets weaker but chugs more rapidly. my car has lost a lot of power Rating: 5