I can't figure this one out. I have a 2001 sentra se that jerks or hesitates when I press on the gas at low RPM. When I would let the clutch out, at the very end it would feel like a skip and I couldn't start in second gear like I used to. I thought the clutch was going bad so I changed it out. It still did the same thing, but I realized it was doing it whenever I pressed on the gas more firm even while in gear. If I lightly press on the gas or the car is higher in RPM it runs perfect. Basically it doesn't do it all the time. If I press on the gas in neutral there is no problem. I'm starting to think it might be drivetrain or engine mounts, even though they don't look bad. Anybody have an issue like this?