Nissan 240SX Forums banner
1 - 1 of 38 Posts
If you have the car idling, is the "tapping" noise steady? Also, while standing at the motor, SLOWLY increase throttle with the throttle body. Does the tapping noise INCREASE with RPM? Does it fade away? Does it stay at the same rate? These conditions can help pinpoint the problem.
 
1 - 1 of 38 Posts