i almost have the same problem as the AT neon that needed new motor mounts, mine is a 2001 neon R/T now when i pull up to a stop light my whole car trembles a little, and as i sit at the redlight i let it tremble a little and my rpm's stayed at a steady 750-800. but it would not tremble when i pulled it out of gear... it is a MT......any help?

 

does it feel like it is going to stall??? any engine codes???

 

it feels like it wants to but my car idles perfect while it is doing this... i asked a few friends and it has them stumped also so i am turning to you guys here that may know a little more.... but it only happens on occasion like it wont do it all the time... but when it does it is very noticeable.... but it let it do it sometimes thinking maybe it will stall but it never has... this has been going on for maybe a month

 

clogged injector possible (injector cleaner should help)
Also, changing the plugs and plug wires can help idle....
MSD Plug Wires and NGK Plugs are the best...