is this spark ok?
Race Director
Joined: Nov 2006
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
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Cruise-In VIII Veteran
The spark looks fine in the atmosphere. Which is all your video is showing.
The plug on the other hand, at least on my small phone screen looking at your less than informative vid.
Looks fouled.
Spark plug insulators should NOT be black!
Light tan is a good thing.
BLACK is a bad thing.
A fouled plug will not fire under the pressure of compression. Thus your video is flawed.
Try new plugs. If they foul straight away. why?
The plug on the other hand, at least on my small phone screen looking at your less than informative vid.
Looks fouled.
Spark plug insulators should NOT be black!
Light tan is a good thing.
BLACK is a bad thing.
A fouled plug will not fire under the pressure of compression. Thus your video is flawed.
Try new plugs. If they foul straight away. why?
Race Director
Joined: Nov 2006
Posts: 13,228
Likes: 7,825
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Somehow I have managed to make it as a professional mechanic for 50 years without this spark tester.
None the less, a fouled plug is fairly easy to spot.
And a inductive pick-up timing light will quickly tell you if a plug is firing or not. Without the need to purchase more equipment.
And you simply can not get by without a timing light.
Just my 2 cents.
None the less, a fouled plug is fairly easy to spot.
And a inductive pick-up timing light will quickly tell you if a plug is firing or not. Without the need to purchase more equipment.
And you simply can not get by without a timing light.
Just my 2 cents.
Racer
Joined: Jan 2020
Posts: 470
Likes: 147
From: Va.Beach Va.
Somehow I have managed to make it as a professional mechanic for 50 years without this spark tester.
None the less, a fouled plug is fairly easy to spot.
And a inductive pick-up timing light will quickly tell you if a plug is firing or not. Without the need to purchase more equipment.
And you simply can not get by without a timing light.
Just my 2 cents.
None the less, a fouled plug is fairly easy to spot.
And a inductive pick-up timing light will quickly tell you if a plug is firing or not. Without the need to purchase more equipment.
And you simply can not get by without a timing light.
Just my 2 cents.
Dr. Detroit
Joined: Mar 2012
Posts: 10,097
Likes: 4,027
From: New Braunfels Texas
Still my goto......it doesn't care if the plug is fouled......gives a visual indicator of spark potency....
20610 Inline Spark Tester | Lisle Corporation
Jebby
20610 Inline Spark Tester | Lisle Corporation
Jebby
Thread Starter
Advanced
Joined: Apr 2023
Posts: 52
Likes: 1
From: Anoka, MN
Thanks for the responses.
The main concern was the strength of the spark and the fact it is firing just on the edge of the electrode. Hard to see in video but the spark is a blue color, not bright white. best to watch it on youtube for larger version.
I get a lot of backfiring in the muffler/exhaust and was thinking week spark allowing unburnt fuel passing exhaust valves.
I do have timing light but sure it doesn't indicate strength of spark; I think it flashes the same brightness regardless of voltage to the plug.
The main concern was the strength of the spark and the fact it is firing just on the edge of the electrode. Hard to see in video but the spark is a blue color, not bright white. best to watch it on youtube for larger version.
I get a lot of backfiring in the muffler/exhaust and was thinking week spark allowing unburnt fuel passing exhaust valves.
I do have timing light but sure it doesn't indicate strength of spark; I think it flashes the same brightness regardless of voltage to the plug.
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Verdad Gallardo
Race Director
Joined: May 2006
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Thanks for the responses.
The main concern was the strength of the spark and the fact it is firing just on the edge of the electrode. Hard to see in video but the spark is a blue color, not bright white. best to watch it on youtube for larger version.
I get a lot of backfiring in the muffler/exhaust and was thinking week spark allowing unburnt fuel passing exhaust valves.
I do have timing light but sure it doesn't indicate strength of spark; I think it flashes the same brightness regardless of voltage to the plug.
The main concern was the strength of the spark and the fact it is firing just on the edge of the electrode. Hard to see in video but the spark is a blue color, not bright white. best to watch it on youtube for larger version.
I get a lot of backfiring in the muffler/exhaust and was thinking week spark allowing unburnt fuel passing exhaust valves.
I do have timing light but sure it doesn't indicate strength of spark; I think it flashes the same brightness regardless of voltage to the plug.