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Old 04-12-2008, 11:47 AM   #1
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Default Spark Tester

I hope I'm posting this in the right section. I've noticed a lot of people needing to check for spark to test their coil packs. From personal experience I know that a bad coil can be within specs of its resistance and will often fire a spark plug outside of the cylinder. Once the spark plug is in the engine it won't spark do to the compression. I bought an Adjustable Ignition Spark Tester #25069 from Autozone for under $10. It'* easy to use and if your coil is weak, it wont spark (unlike a spark plug). I hope this helps some people here. This club is great, and again, I apologize if this is posted in the wrong spot.
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Old 04-12-2008, 11:50 AM   #2
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Have no fear, you are in the right spot

I actually think I might check that out
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Old 04-12-2008, 11:54 AM   #3
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Very few cars are running enough compression to prevent a spark. I generally keep an extra spark plug around, simply disconnect a wire, pop the extra plug in, and touch the plug base to ground while someone cranks the car.

This procedure will suit 99% of the members here.
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Old 04-12-2008, 06:43 PM   #4
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Quote:
Originally Posted by willwren
Very few cars are running enough compression to prevent a spark. I generally keep an extra spark plug around, simply disconnect a wire, pop the extra plug in, and touch the plug base to ground while someone cranks the car.

This procedure will suit 99% of the members here.
Sorry, it was just a suggestion. :( I haven't had to use it on my Bonneville. it'* good to know that GM ignition systems are that simple to diagnose.
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Old 04-12-2008, 06:50 PM   #5
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Quote:
Originally Posted by 97SEinPA
Quote:
Originally Posted by willwren
Very few cars are running enough compression to prevent a spark. I generally keep an extra spark plug around, simply disconnect a wire, pop the extra plug in, and touch the plug base to ground while someone cranks the car.

This procedure will suit 99% of the members here.
Sorry, it was just a suggestion. :( I haven't had to use it on my Bonneville. it'* good to know that GM ignition systems are that simple to diagnose.
for the cost, its not a bad thing to have a round.
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Old 04-12-2008, 07:08 PM   #6
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Quote:
Originally Posted by 97SEinPA
Quote:
Originally Posted by willwren
Very few cars are running enough compression to prevent a spark. I generally keep an extra spark plug around, simply disconnect a wire, pop the extra plug in, and touch the plug base to ground while someone cranks the car.

This procedure will suit 99% of the members here.
Sorry, it was just a suggestion. :( I haven't had to use it on my Bonneville. it'* good to know that GM ignition systems are that simple to diagnose.
What'* the sorry for? I'm just proposing an alternate method that works.

FWIW, there'* probably a dozen cars here who have blown out spark at one time or another due to extreme levels of boost.
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