Nissan Primera Idle problem 04 plate - 2.2 diesel

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30 Apr 2007
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Surrey
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United Kingdom
just got my diesel Primera, all is running well accept when the car is idling the speed rises and drops from 800 (750) rpm to 600 rpm approximately every 1 second. The car does not turn off or have problems accelerating. Any ideas to what it might be?
 
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Coolant temp sensor or an air leak on the manifold somewhere
 
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Found a tech bulletin on Nissan system today relating to Denso injection pumps, there is a repair kit available to fix a problem with a suction valve on the pump, one of the symptoms listed is exactly what you described. I had an Almera in today with same fault (same engine type too...)

Cheers, Gaz
 
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