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how to change plugs and leads?

my nissan micra misses at idling speed after throttling down and is jerky when cruising on the road.its the 998cc 16 valve version petrol on a n plate. changing the plugs and leads my solve this how do i approach this not being a mechanic.

craig
August 2010
It is best to do this one plug, and one lead at a time, this will keep the firing order correct. Take the lead off a plug, remove the plug with a plug key or socket, then attach a new plug to a piece of tubing, and present the plug to the threaded hole. If you inadvertantly screw the plug in on the wrong thread, the tubing will turn on the head of the plug, and will not damage the thread. Turn the plug back out and try again. Be sure to get the plug alligned properly otherwise damage to the thread will occur. Now replace the lead to the distributer, or dispac, and connect to the new plug. Do the next plug and lead as above.

aranger
August 2010
only real thing you have to worry about is not to mix up the leads,where they come of the cap make sure they go back on exactly where they came off and also at the plugs,look in your hand book and get the plug gap and adjust with feeler guages,dont overtighten the plugs just nip them up.

wickham
August 2010
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