BOTM Winner, April 2013
I have a 2011 Vaquero with just over 42,000 miles. In the last month, it has been idling about 400 rpm's too high for the first few minutes. The duration of the high idle has been getting progressively longer. At first, within a few minutes the idle would drop back to normal, which I lowered a couple of years ago to the minimum setting of 850. Yesterday, it took over 20 minutes before the idle finally dropped back to normal. Anyone know what might cause this?