Maybe "weird" isn't the correct term, but it sure is annoying... 

 

When its hot out (like today 90+ degrees) my accelerator seems to stick... Ill pull up to a light in neutral or with the clutch in and my RPMs sit anywhere from 1500-2000 until I reach my foot under the pedal and pull it back up the RPMs drop to like 1000 (which is normal)

 

Im just wondering, the cable was replaced within the last few years... so is it possible to lube it at all? Maybe the spring on the weber isn't pulling the cable back up far enough (though it doesn't happen 100% of the time, but it happened at every light on my way home today)

 

Maybe I need to spray brake cleaner on the carb set-up and lube that whole area? it is pretty dirty (as seen below)

 

 

Some lube on the pivot point of the pedal may help also.

put some wd-40 and see if the problem go away....