1997 Toyota Camry RPM going up and down when speed reduced

1997 TOYOTA CAMRY
100,000 MILES • 6 CYL • 2WD • AUTOMATIC
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JIGANS
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Hi,

I got 1997 Camry XLE V6 - at times when I am driving at a constant speed of > 55 miles and reduce speed to 40 miles or so RPM will start going up and down between 1100 to 200. It would not die but run rough - once I turn it off for about 5 minutes and turn it back on - no problems for weeks or months and it will come back again.. Usually I have noticed that If I don't let it idle to 600 RPM - that happens if I let it idle everytime to 600 RPM it will not happen.. No Check Engine light on and when it doesn't do this it is as good as my 2007 camry in running..

Any ideas?
Apr 23, 2008 at 3:40 PM
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BMRFIXIT
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  • 19,053 POSTS
check and clean idle air control valve as a 1st step
Apr 24, 2008 at 6:10 AM