Referring to the engine when the accelerator is depressed and the engine does not seem to keep up (hesitates) with the driver's demands. Hesitation can be followed by stalling (engine quitting) or by surging (engine building power without notice).
Referring to the engine when the accelerator is depressed and the engine does not seem to keep up (hesitates) with the driver's demands. Hesitation can be followed by stalling (engine quitting) or by surging (engine building power without notice).