How to TEST a Coil Pack with Basic Tools ⚡ NO Scan Tool Required

How to test a coil pack with basic tools. I show you how to use a coil on plug spark tester so there is no scan tool required. CHEAP and easy DIY ⚡ ⚡

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Coil tester:
A basic & simple 12V test light with worldwide delivery and various stock locations
Voltage & continuity tester similar to mine, but updated with LCD display

An insight into ‘dielectric strength’:

0:00 How to test a coil pack with basic tools
0:26 Power balance test, disadvantages
0:46 Misfire under load, discussion
1:14 Preparation
1:29 Remote Starter Switch - top tip❗
1:40 Coil over plug tester, overview
2:22 it's physics Jim
3:15 Ignition coil spark test, procedure
4:19 Ignition coil test results explanation
5:04 Testing ANY ignition coil
5:31 Testing ignition WIRING
7:32 Other misfire causes

Learn more about looking after your car:
🎥 Don’t let your fuel filter end up like this 100,000 mile old example:

Everyone should have a tyre pressure gauge in their glovebox:
I personally prefer a stirrup pump to a foot pump (I use the same one for my bikes and cars)
If you’d like to learn about the science and engineering of cars:
Bosch Automotive Handbook:

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Thank you

[akahan]

Hi, your videos are always so clear and helpful (and I, for one, enjoy the chattiness.) A question on this one though: The instructions that come with the ignition coil tester say in part: "make sure that all the plug connectors [for the coils you're not testing at the moment] are earthed; if not, this might damage the ignition system's output stage or other components..." Is this something to be concerned about using the method you demonstrate here? Thanks!

[ivaneatoniii]

Gotta love the description basic tool. Majority or everyone else would not think this speciality tool would be described as basic. Basic means good chance you could already have it and it has mutiple usages. This tool is 3 days away by fastest shipping here’s a real help. Electrical power testing pen. Use it and because it’s dc current that is pulsing it will show the pulse and when you see a short or weaker pulse there’s your issue then test deeper before replacing as it could be a bad connection

[mbliang]

Thanks for a great video. How did you crank the engine without turning the key?

[crocktears]

Hello, I would like to know how you did your Remote Start Mechanism? Did you use a module or you just did the cable connections by yourself? Counting on your co-opearation. Thank You.

[lloyd-qtmg]

Syd, when you check that the lbulb is flickering on a 4 wire coil over system, is your test light grounded externally or into the ground terminal within the coil's connector? Either way I cannot get the bulb to flicker with the starter swinging the motor? This car is 'mis firing' badly!

[jsus]

God bless you, always laying down the facts and making it as easy to understand as possible

[trevorcarty]

My coil melted to the connector. What should I do?

[lorddiablo]

I am still waiting for your video on " How to repair the lumber support of driver seat " ....

[Rockiwi]

Excellent video, so straight forward and explanatory, very simple method of diagnosis.Thank you.

[cheapswede]

Cyclone Cyd; I purchased the US version of the spark tester in your links. The graduations marked on it are for kilovolts. The last mark is 40. However, the 30 kv mark is roughly 2cm. 40kv is just over 2.5 cm. You indicate in your video that a 2 cm gap should give us a 60 kv spark if large and blue. Does the manufacturer have this tool mismarked?

[joshcymbala]

Excellent information, using a cpl steps to test my camaro ss coil and signal. Thanks again!

[chrishard]

Nicely presented and a real practical function test. Just what I was looking for. Thanks.

[dailynetkebumen]

Great.
It ia very simple and clear. Thanks, Uwa from Indonesia

[francissomadaly]

Great Video. Do you think.this would work ok with my 91 colt? The ignition coil is part of the distributor 😳

[phillmcaverty]

You can pull the rubber from the coil pack to see if there is corrosion between pack and spring

[badshotuk]

Fantastic video Cyd and cheap way testing coils under load, Cyd my Aero has a misfire on idle but not under load, what do you suspect that may be?

[josephdanone]

Thanks for detailed infos and complete presentation🙏🙏🙏

Keep Safe 🙏🙏🙏

Thanks & God Bless 😇😇😇

[canadiansaabfreak]

Quick question: can a bad coil cause a spark plug to go bad?

[sjgfloydrose]

Hey do you really need to pull all the actual sparks out too ? Thanks for awesome video

[ewgoforth]

Where do you connect the other end of the wire for a remote start?