I have a 95 jetta, 2.0. Recent tune up, new timing belt. I moved to houston from oregon last summer and when I got to houston, my car started sputtering. At low RPMs, when the gas is stepped on it sputters and jerkspretty hard, almost as if the engine was being turned off and on. It didnt do it everyday and there was no regular pattern to it. I had the timing belt changed and that didnt do anything. Then it eventually went away. Well, its back and I have noticed that it only does it on HOT days. Also, it will only do it when the engine is warm.

Any suggestions would be appreciated