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Re: How to check for spark? Posted by RS [Email] ![]() ![]() ![]() In Reply to: How to check for spark?, jwr, Fri, 27 Jul 2001 20:46:05 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Won't turn over? As in "won't crank at all"? or "won't fire"?
If it doesn't crank at all (turn key, no noise), it can't get far enough in the starting sequence to let a spark happen. Then you probably have a current drain, bad alternator brushes, broken ground wire, or some other charging problem.
But, if you can get it to turn over (not like a Suzuki Samurai turning over, of course), the way to check for spark is to pull the center wire off of the distributor cap (this wire goes to the spark coil), hold the metal part of the wire close to a metal part of the body like the radiator support, and have a friend crank the car.
You may want to use insulated pliers to hold the wire just in case the insulation is bad and the spark wants to go to ground through you instead of the 1/8" air gap between the wire and the car body.
If it's really damp and the spark plug wires are old, testing may be a moot point - the dampness could be bleeding off the spark before it gets to the plugs.
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