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This question can't be answered as there are too many possibilities. I would suggest a complete tune up and if that doesn't fix it, then take the car to a qualified, reputable repair facility. It could be anything from a clogged injector to a vacuum leak to things much more severe. Good Luck.

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Q: How come my 99 dodge neon runs rough at idle?
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Related questions

What is the optimum idle speed for a dodge neon?

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%.


How do you adjust the idle on a dodge neon?

Idle speed on a Dodge Neon is not adjustable. Idle is computer controlled with an airflow control motor on the throttle body.


How to adjust Idle on dodge neon 2002?

it is not adjustable, controlled by the computer


What is the correct idle speed for 1996 dodge neon?

The correct idle speed is 1RPM x4.2-7.888


How do you lower the idle speed on a 97 dodge neon 2.0L?

Due to the electronic fuel injection system in the 1997 Dodge Neon it is not possible to lower the idle speed. The engine control system computer adjusts the speed automatically.


What should the idle rpms be for a 2002 dodge neon?

500-1200 The computer will decide.


How do you adjust the idle speed on a 1995 Dodge Neon?

Idle speed is controled by the computer. Unless there is a screw on the throttle body it is not adjustable.


2000 dodge neon rough idle?

check to see if water pump is failing this will throw the timing off and will only get worse eventually the belt will snap and bend the valves in the motor and then its very costly to repair


Where is the idle air control valve located on a 1995 dodge neon?

It is on the base of the throttle body.


Why does your 2005 dodge neon run rough?

you need a major tuenup,plugs etc


What makes a dodge neon idle high and low?

A bad idle control module will make it race up to about 3000 r.p.m. when in park.


What is code 25 on a 1999 dodge neon?

Idle air control motor circuits, target idle not reached (+/- 200),vacuum leak found