How to test an ignition coil, Diagnose a bad ignition coil. Ignition coil with multimeter, Misfire

This video shows show to diagnose a bad ignition coil with or without a multimeter.
Increased resistance indicates less voltage aka can be going bad.
#mechanic #diy #engines #engine #compression #gearhead #automobile #carwork #enginework #enginework #ignitioncoil #repair

[@user-uj3cc8xk8f]

Amazing tutorial! I am measuring the ignition coils to my truck, Primary should read 0.6 - 0.9 Ohms. Multimeter set on 200, the readings I am getting are; Coil one 02.5; Coil three 01.9; Coil five 01.6; Coil seven 01.8; Coil two 02.6; Coil four 02.3; Coil six03.8; Coil eight 03.6. When I set the multimeter on 200 on the screen it shows 1. Do I extract the 1 out of the readings?

[@TheDIYDoc]

Make sure yall follow. Page is fairly new but I’m posting often!

[@TheDIYDoc]

Hmmmm are you sure they’re supposed to be 0.6-0.9? And no you don’t subtract 1. Higher the resistance the older the coil and the less voltage it will produce. High resistance is bad for voltage flow.

[@ahmedfouad9847]

Is amazing no alot of body is talking and he dont know about this point i have missFire in all cylinder without any fault code on the scanner and i have alot of think after i saw your video i teat my ignition coil is give me 2.9 & 3.0 but the problem i dont know what is the standard range u can help me to know what the stander range or my vehicle 🫡

[@jeffreyzondo7560]

Im checking my ignition coils. Kia rio. 4cylinder Output is 5.99 , 5.96 , 6.06 , 6.06. Are they fine or must i change

[@TheDIYDoc]

Idk the standard for your car but if they are all equal that’s reassuring and likely fine.

[@chipsisshook1741]

If I’m doing this on a motorcycle, my coils look the exact same btw, but should I just replace all of them while I’m at it? I’ll be testing mine tomorrow.

[@TheDIYDoc]

On a motorcycle likely only 2. Also they are likely a different configuration and set up.

[@chipsisshook1741]

@@TheDIYDoccan I test them relatively the same way though?

[@TheDIYDoc]

@@chipsisshook1741 yes. Same concept. Connections are just different is all.

[@chipsisshook1741]

I just tested my motorcycle one, the range is supposed to be 1.6 to 1.8 ohms and I got 2.5. Does this mean it’s bad?

[@TheDIYDoc]

No. That’s small range. If it runs it’s fine. I wouldn’t even check em unless you’re having a miss. Mild increase in resistance isn’t an indicator it’s bad

[@chipsisshook1741]

@@TheDIYDoc i have a misfire in one of the cylinders. What else should I check

[@TheDIYDoc]

@@chipsisshook1741 check spark plug. Ignition coil. Compression. It’s one of those things long as getting gas to it. What was ohms on other coil? Similar or different.

[@TheDIYDoc]

If other coil is 1.6-1.8 then yes that 2.5 is prob bad. As resistance increases forage decreases could be causing weak spark

[@jeffreyzondo7560]

Im checking my ignition coils. Kia rio. 4cylinder Output is 5.99 , 5.96 , 6.06 , 6.06. Are they fine or must i change