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K11 Nissan Micra s 1.0 x reg - K11 Micra engine problem - AvengedArmy
When I start my car and let it idle (I can't drive it, I haven't passed my test yet) it has no problems while its heating up, but when it gets to operating temperature the revs drop and then return to normal and it repeats for a couple of minutes then cuts out. I read that a quick solder job can fix it, but it's a different throttle body? I can't think of what it could be?
K11 Nissan Micra s 1.0 x reg - K11 Micra engine problem - elekie&a/c doctor

Your car is the later model that does not have the throttle body with solder joint issues.Without a more in depth investigation,It would be difficult to diagnose the problem.