The topic for today is spark testers, and what ones you should use, and what ones to avoid.
So I've found that there are three basic styles,
The basic theory on this one is that if your coil can light up a led bulb, it should run the motor, this is false. The way this is designed, any amount of voltage will light up the bulb, which will not necessarily make the motor run. while you can light the bulb, and have a running motor, there is also chance that your spark isn't strong enough under compression.
And the second:
This is a totally different design than the last, in this one, the gap is a certain distance, to simulate the effects that compression has, on the ease of making spark, as if you have a plug without compression, it sparks much easier, while under compression, it is much more difficult. So in theory, if it can make the distance, it has enough power to spark the plug under compression, as many of you know, you can spark the plug, and still not run.
And the third one:
This one is not much different than using just a spark plug, but it is designed for ease of use.
The way this one works is, you attach the wire to the plug, as normal, then you attach the clip to the block of the engine, to ground it. so it is the same basic concept as using just a spark plug to check for spark, but instead of having it rest on the engine, it will now stay in place.
So what one to pick?
The answer is number two.
I have personal experience with this tester, and it has never failed me. It has what all the other testers lack, and that is simulated compression. While you may have luck with these testers, i suggest steering away from 1 and 3, as they will just waste your money.
So what do you use?
Keep 'em cranking,
Not everything in here is true, i have read some false information, check below for correct info.
Now im not one to point fingers, but, thanks wikipedia hehe
Thanks for the correction, DougT
Edited by 637Yeoman, March 29, 2017 - 09:51 PM.