why acceleration going up and down?

2003 NISSAN SUNNY
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RAZI
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  • 1 POST
my car is manual. the engine rpm going up and down(1000 to 2000) in between gear shifting.That is for gear shifting I press the clutch pedal the rpm acting like this and if I hold it(clutch)after sometime rpm coming down why?
Dec 6, 2011 at 5:04 PM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
check for vacuum leaks, and check the idle air control valve.
Dec 6, 2011 at 5:07 PM