I have a 1989 Suzuki Sidekick JX 4X4 Standard. I can't find the issue of jurking. When you reach that spot when the motor is no longer pulling nor coasting it starts jurking. You either let off the gas or give it gas. Not always but to often enough. I had a mechinic say that the butterfly in the throttle body was worn and alowing it to flutter. Three throttle bodys later and its still an issue?????? I can't find anyone who can address this problem, any ideas???