<html><head></head><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:16px"><div id="yui_3_16_0_1_1457837741805_6702">How to know if spark plug cables are shot...or on the way out? Ditto for plugs.<br></div><div id="yui_3_16_0_1_1457837741805_6725"><br></div><div dir="ltr" id="yui_3_16_0_1_1457837741805_6726">I ask because, after bad running...and thorough cleaning etc of distributor, and even the old trying other points, rotor, cap etc...to fix....just a jiggle and snugging up of the spark cables seemed to be what got the car running. But I do that a lot...and clean plugs.</div><div id="yui_3_16_0_1_1457837741805_6838" dir="ltr"><br></div><div id="yui_3_16_0_1_1457837741805_6845" dir="ltr">When to give up on that "fix" and get new cables and plugs? Any test thing to do? There's no "best if used by" sticker on anything.<br></div></div></body></html>