Reader Question: I have a 2002 Dodge Dakota that will not idle either hot or cold. Can you tell me the problem?
First thing I look at in idle problem complaints is the throttle body and idle control motor and clean them as needed or in some rare cases replace the idle control motor. Both components are notorious for accumulating dirt and carbon soot, which will affect idle performance.
Second thing I would look at is do you have a vacuum leak somewhere under the hood? Look for anything that might have come loose or a vacuum hose connection that might have broken off. You can sometimes hear a hissing noise under the hood with the engine running.
Third thing would be to read the computer codes and see if any negative information has been stored on your on board computer.