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Fired up a freshly rebuilt 289 2-v this weekend. Problem:
Runs smoothly as rpm increases, but coming back to the
idle rpm range the engine starts to vibrate noticeably. Shortblock was professionally rebuilt and I used a known
flexplate and original harmonic balancer. Hoping this is
not an imbalance problem. ( If the motor is unbalanced, would it vibrate at all rpms?) Any input as to possible problem
would be appreciated.... I believe the timing and the carb are
OK.
Runs smoothly as rpm increases, but coming back to the
idle rpm range the engine starts to vibrate noticeably. Shortblock was professionally rebuilt and I used a known
flexplate and original harmonic balancer. Hoping this is
not an imbalance problem. ( If the motor is unbalanced, would it vibrate at all rpms?) Any input as to possible problem
would be appreciated.... I believe the timing and the carb are
OK.