Nissan Primera P12 diesel, slow starting in cold |
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petterg 
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Joined: 01 Jun 2014 Location: Norway Online Status: 
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 Posted: 03 Mar 2021 at 9:06am |
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The day before the new plugs arrived, starting was really slow, even in temperature of +5C. Then I measured the plugs again and found one that had open circuit. I replaced this one, and the red warning light did not come on the next cold start. Weather is not cold enough to tell if this actually fixed the slow start issue. I might not get an answer to that before next winter. Until then I have 7 spare glow plugs.
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roy.2
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Joined: 23 Jan 2010 Location: Nr Bourne Lincs Online Status:
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Posted: 03 Mar 2021 at 4:10pm |
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I would renew the other 3 plugs then they can all wear down at the same time.
 Keep the old 3 as your spares.
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Roy
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petterg
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Posted: 10 Mar 2021 at 8:45am |
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Still hard to start in cold. I'll replace the reminding plugs. Actually I see it as a negative thing if they all wear down the same. That mean when you run into trouble, you'll end up not being able to start the car while waiting for new parts.
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roy.2
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Posted: 10 Mar 2021 at 10:51am |
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They will not all fail together,
 but they will wear down together, now you have 1 new glow plug shining away with a white hot tip, with the other 3, at best, just burning red. 
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Roy
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