求翻译：6.不准经常采用吊火法。有时汽车火花塞会有积炭，当某缸的积炭严重时，该缸就不能正常工作，为了使该缸能正常运行，采用缸外“吊火”的方法(将火花塞与高压线之间留3毫米是什么意思？

6. no often-suspended by fire. Sometimes car spark plug will has product carbon, dang a cylinder of product carbon serious Shi, the cylinder on cannot normal work, to makes the cylinder can normal run, used cylinder outside "hanging fire" of method (will spark plug and high voltage line Zhijian left 3 mm-4 mm of gap), to improve spark plug electrode jump fire of energy, makes the cylinder recovery work, but General of "hanging fire" method slightly not note on easy shedding. If you drip on cylinder petrol, is very prone to fires. Therefore it is only a temporary remedy. Correctly handling should be timely cleaning spark plugs, try to avoid using "hanging fire" method.