Having problems with your 2003 Volkswagen Passat ?
Stumbling Idle vehicle sat outdoors for 4 days in 15-20 degree weather. Started fine but at first stop idle became very rough. No OBD II codes set, and rough idle stopped after light changed and accellerated. Did not recur until two days later after car sat for full day in 30 degree garage. Upon start rough idle, then gave accelleration and it was gone. Still no OBD II codes. Water in gas? Bad fuel? Deposits? Car is in excellent shape and has 105000 miles and has always been serviced by factory
Possibly ajusting itsself. any severe weather/pressure changes in your area? and if so does your cars cpu compensate for this (thinks its at a different elevation etc then resets its idle proper after a certian time? I have heard of this but not sure if VW uses it) perhaps ask the service tech.
Repair Help & Product Troubleshooting for 2003 Volkswagen Passat
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