Have it checked out by a mechanic. The most likely thing is the car just needs a good tune up to replaced plugs and wires that are wearing out.
The dodge neon has an optimum idle speed like any other car. The Dodge Neon's optimum idle speed at rest is between 12.9% and 13.3%.
There is a idle screw that you simply tighten to increase the idle speed or unscrew to reduce the idle speed. look under the hood at the throttle linkage.push the gas and let off of it. when you let off look where it comes to a rest. you will see it comes to a rest against a screw. if you want to idle it down just turn it counter clock-wise. i believe it is star shaped. so a regular screw driver wont work. hope that helps. this should be quick and easy 2 min job
Idle means: at rest or sleeping or not moving.
Force, which causes acceleration
The abstract noun for the adjective idle is idleness.The abstract nouns for the verb to idle are idler and the gerund, idling.The word idle is a concrete noun, a word for a mechanism for regulating the speed at which an engine runs at rest; a setting of a motor vehicle transmission.
Play or rest.
Sleeping.
The law that "A body initially at rest remains at rest.", since no vibration is visible from here.
You rest between tasks.
a body at rest may have speed
High is 7/8 ths of a turn out from lightly seated. Low would be 1-1/4 turn out. This is ball park settings. The saw should run but will need fine tuning. Be careful not to turn the H screw in to far and lean out the mixture and damage the motor. The idle adjustment should rest, centered on the pointed end of the idle speed adj. screw. Once the H and L jets are adjusted then you want to turn the idle screw out as far as possible so the idle is set at the lowest smootly running speed you can achieve. http://store.chainsawr.com/
At rest. Stationary. Idle.