1999 Dodge Durango idleing problems

There may be a fault code or codes stored, though. Have an engine scan done for trouble codes as a first step in diagnosis. If no codes are present, I would start by investigating the idle circuit-clean the throttle body and have the IAC (idle air control) tested for proper operation. Good luck.

P0505 - Idle Control System Malfunctionhttp://engine-codes.com/p0505.htmlForum CodePossible causes- IACV-AAC valve harness is open or shorted
- IACV-AAC valve poor electrical connection
- Faulty IACV-AAC valve

Read more: http://engine-codes.com/p0505.html#ixzz1zVJIt34L

You may want to clean or replace your idle control module called the IAC which is mounted to your throttle body. This is a stepper motor which controls air threw a passage in the intake. This can cause the engine to rev and allow more air to pass threw the intake. Acting like mashing the gas pedal down no difference.
Your PCM or Power Control Module controls this stepper motor by controlling voltage threw windings which open and close. If this motion is hindered by the IAC this motion can not happen fast enough and Bam you have the problem you have described. Both get out of sink and can not keep up with one another. If you need any further assistance just ask

Check for a vacuum leak or torn air intake duct that's letting in unmetered air. Also check the accuracy of the engine coolant temp sensor. Finally, find out why it's overheating at idle--that's really serious. Most common cause is a failed radiator fan relay.

• First check the fuel filter and if the fuel filter is almost 6 months now is the time to replace it.
• Then drain the fuel tank also.
• If its still have questions feel free to reply to this solution.

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could be the idle air control valve, vacuum leak or a bad throttle position sensor.

idle control valve is either gummed up or broken . now pay me

Probably lost idle memory,all computer controlled keep it running for a period it should regain the idle memory if not make sure no rodent chew damage to wires to the throttle position sensor, if check engine light is on scan for faults.

FIrst have you tried giving the engine a tune up (ie replaced the spark plugs)

Also you need to check the condition of all the vacumn lines on the engine loss of vacumn can cause poor idling.

replace the battery, on a dodge when battery is weak the idle air control solenoid tries to search for the right position. and will keep stalling sometimes wont stay running.