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I have a 01 Altima my idle gets rough Nd then smoothed out then few minutes later gets rough Nd then smoothes out it doesn’t hesitate or anything just the idle goes smooth then rough it’s like a 2 minute cycle what could it be? They put a new computer in new distributor new wires new plugs what am I missing
 

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I have a 01 Altima my idle gets rough Nd then smoothed out then few minutes later gets rough Nd then smoothes out it doesn’t hesitate or anything just the idle goes smooth then rough it’s like a 2 minute cycle what could it be? They put a new computer in new distributor new wires new plugs what am I missing
The idle speed should normally be 650 (+/- 50) rpm. If the idle speed keeps pulsing up and down, then the IACV-AAC valve or it's harness may be defective.
 

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2008 Nissan Altima 2.5z coupe
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I have a 01 Altima my idle gets rough Nd then smoothed out then few minutes later gets rough Nd then smoothes out it doesn’t hesitate or anything just the idle goes smooth then rough it’s like a 2 minute cycle what could it be? They put a new computer in new distributor new wires new plugs what am I missing
Could be idle air controls value also
 
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