Tj929

Hey just done the idle cable mod for a 929, does it matter which side i screw the idle cable into? the left or right? the problem is that i turn the idle up in neutral with the idle up faily high but when i click in 1st it drops down to just a little over standed. when i click it back to neutral it jumps way up again,
also when rolling along, at a fair speed in gear, with the clutch in, while the idle is up it stays up but as soon as i slow to almost stop it drops down again,
anyone have these problems? how do i fix this? thanks