2007 Daewoo Nubira oscilating idle speed

2007 DAEWOO NUBIRA
70,000 MILES • 4 CYL • 2WD • MANUAL
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BOBJORA
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nubira lpg 1.6 , 2007; old 2000-2003 version;
my car has oscilating idle speed as follows:
when engine cold: 1000-2000rpm;
when engine warm: 1000-1500rpm.
it was checked : iac valve, sensors. the problem is from the car was new!! somebody told me about soft ?![img:9dde5a6922]http://www.2carpros.com/forum/automotive_pictures/418382_Daewoo_Nubira_front_20080115_1.jpg[/img:9dde5a6922]
Oct 6, 2009 at 5:15 PM
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DAVE H
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have the dealer check for software updates and check for engine vacuum leaks
Apr 11, 2010 at 6:57 AM