Those coils have three prongs on them. Which wire do you check for resistance,the ground and power wires or which ones do you know to check for resistance ?
Peter, do you need to take out the ignition coils? Or is it OK to just disconnect the cables and test the ignition coils (like in the video) while they are still in the engine? Very good video, by the way!
Snap on sell a tool look like a pen.....while engine running...using that Pen and touch on top the coil.....If any coil not light up the Pen...then that is a bad coil....a rhousand times easier than using an Ohm....and you not sure which and which.....A kind of job IN and OUT from dealership that DAILY..people doing for living...GOT NO TIME TO TEST LIKE THIS!!!
my car has 4 wires in each coil on the first and second gives me 0.05, with the third gives me 0.00. and the fourth gives me 2.93. What do you advise me change all. or well? first of all, Thanks.
If the number is smaller it means the coil is closer to a short circuit,. The resin on the wire inside the coil is melted and is starting to short. Zero ohm would mean infinite resistance.
This is not what you said in the video. The bad coil had a high number (970+) and the good coils had zero number (low). In the video you said a high number of resistance is the bad coil. Now you say in the comments that the "higher number" means the coil is "good". ??
robert bruce in the video he was measuring the resistance, not volts. Low resistance (0) is good. The bad coil was showing 9.2 resistance which is bad. It should be 0. But voltage should be high but in the video he wasn't measuring the voltage.
Dont make any sense i just bought two ignition coils and ohms reading was showing 1.75 and the two bad ones were reading 1.15 how can u say the one on the left is bad when the two on the right showed no ohms? Someone help me understand cuz im confused as heck
hallo sir I have toyota Camry 2005 yesterday I have kind of that Chuck light. but know that is remove automaticle .ido nothing. and to times come that happens. automaticle remove. ma be some author esho. 🤔
I am not following this. You tested the two coils on the right and they both showed no resistance. The one on the left showed resistance and you said it was the bad one? Aren't good coils supposed to have a resistance range on them that shows they are good? Having no resistance at all leads me to believe that they are bad and not good, as you said in the video. Confusing stuff.
Resistance means there is a current leak between the two contacts. The meter reading (1) is saying there is no current leak between the two because there's actually infinite resistance. Hope that clears it up.
@@PeterFinnTheCarDoctor I have a '95 Nissan Maxima. Its coils have 3 prongs as well. I saw a youtube video on a Maxima that says if you find resistance in, I think, ground and positive, the coil is good. You're saying the opposite. I'm confused. His test showed 6.6 ohms. Can you give some clarification please? Here's the youtube link: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-SZPiD7nv9Bw.html and it's at the 4:43 mark of the video
I really appreciat you but when you measured igntion coil you makes me confused when the igntion coil you measured first when you get resistance you said it bad when you measured second round you said bad the igntion coil you said good
Hi mr Peter, I have a 2003 Toyota Matrix with 1zzfe engine VVTI, it's a 4 pin coil. First and second pin shows 0 resistance, first and third pin shows 22 with the first coil, 23 with the second and 20 resistance with the 2 others. Now, first and four pin shows 21 with the first coil, 23 with the second coil and 20 resistance with the 2 other (the same 2 indicated above). The problem is that, when I start the engine it starts well but turns off immediately. And when I force to drive, the engine shakes alot in slow motion. Please what do you advise me to do?
Wow , I didn’t know that Dracula was a mechanic too. Luk into my eyessss You are geting sleeeeeeepier. Now you are in homede put. Hahahahaha I am just pulling your legs man, thank you for your video.✌️
hello mr peter, i have a 2000 toyota celica 1zzfe engine same with corolla engine, its a 4 pin coil, first and second pin im gettin 0 resistance, first and third pin im getting 27.4 resistance, first and four pin im getting 26 resistance, i have my meter set up at 200k oms, i pu new spark plugs, new throlle body, new iddle control valve, the car iddles bad and it won't accelerate over 5000 rpm, battery was bad i put new battery and still iddle bad, you think bad car computer or bad ignition coils, great videos...
Thank you Peter I love you so much, very intelligent person She speaks English very well We Arabs love someone who talks slowly to understand what is being said Thank you
no they is other stuff that can be too air intake idle control valve fuel clog no fuel getting into engine no air there is lots of stuff to take into account. Rough idle caused by spark plugs, spark plug wires or ignition coil problems. If you have a rough idle that is caused by either the spark plugs, spark plug wires or ignition coil, you will also feel it when accelerating. If these parts are bad enough to cause a miss at idle, it will continue to miss while driving
@@untitledduck9675 hi sir, my hyundai tucson starts bad at cold start. Rough idling. But when I fully drive for a couple of minutes (going to market) and when I start it again everything seems fine. Theres a random vibrate sometimes when in stoplight. What could be the issue. How do I test which. I already replaced sparkplugs and throtle body.
@@jmjz3488 so what do u want to do? how old is the car? check the mass air flow sensor that can be a problem it its dirty get look on youtube on how to clean it and i could be your igiton coil but most likely not. BTW is there a check engine light?
@@jmjz3488 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-deypkLZpRRk.html BTW have you ever put fuel system cleaner in your car i would put 2 bottles in if was you because if your car is running bad you should just do it anyways to clean your fuel system do this on a full tank of fuel and before u change your oil because that stuff makes your oil more runny
If I have 2 bad and the other works to me it wouldn’t matter I would change them all because sooner or later it will be damage I would rather just change them all 😬
This is wrong information, if there's no resistance in coil then it's open winding it will never generate the spark. Please don not share the wrong information i like your videos but it's not means you can share anything. Brother you should study about the coil and you will understand. Thanks
Google search , 3 wire , battery voltage , ground , and PCM control circuit ( trigger ) . So NOT simple . But , coils usually fail between the coil and plug Anyway . Sometimes you can see the burning through the heat resistant insulation . Sometimes you can pull apart the rubber like insulation and see that the connection between the coil and wire to the plug is burned . Bottom line , checking with an ohm meter is often misleading .
The coils with zero resistance are bad ,zero resistance means a short circuit, maybe the only good coil is the one with resistance ,he dont know how to read the meter.
You have demostrated wrong test point dude. Eventually, each coil consist of two coils, primary coil and secondary coil as the purpose of induction system. Please connect the right tester cable pole to the coil pole. Red cable to the (+)coil and black one to the (-)coil. You'll get the resistance value of primary coil. Then, you have to check the secondary coil too. Now, connect black cable to (-)coil and the red one to the (+)high voltage coil output which usually connected to the spark plug. You'll get the resistance of secondary coil. Both primary and secondary coil must have value that refers to the standard value which may be different depending the type of every car. So, if there is nothing showed on the tester screen or the values are different to the reference value of good coil, you have to replace your coil with the new one. Correct me if i am wrong. Thanks.
Why is he saying it’s bad when resistance is present on his primary test I thought long it’s in the parameters on that specific coil it’s good the other two with no resistance is bad right? I know he still needs check secondary winding like you explainef
What did you say I turn it to? 2000k ohms or 2000 ohms? Cause at 2000k I get 0050. for all but at 2000 ohms I get 1956.00 for only 2 of them ... понял?
I just watched this vid and there is know real way to test a coil with a multimeter. I just did what this guy said. I also bought a brand new denso coil and compared readings with my old coil both reading were close or about the same. I put the new coil in and took care of the misfire. This is the only vid that tells you to test with a multimeter. None of the other channels will tell you that. Also talked with two professional mechanics and they say same. Don’t waste your time with this guy.
