I have a 98 ZL 440. I just put a 1.25 track, new gears and drivers on it last year. I have always had a problem with the sled bogging in deep snow and after i land from a jump. It is like the engine almost shuts off. I thought it was the throttle switch that was a common problem with the 98 Cats but Cat told me it could be the CDI. HElp please!