How to Test an Ignition Coil Pack - Best Testing Procedure
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- In this video I show you exactly how you can quickly determine whether you have a bad ignition coil pack or not and what is the correct testing procedure to make sure it is indeed the coil and not some other component like spark plug wires, spark plugs, ignition module or other electrical components of your ignition system.
Multimeter Used in Video: amzn.to/2bngr5q
Test Light Used in the Video: amzn.to/2aRI2fJ
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Excellent video, clear, concise, and naturally born instructor. This video just saved me a couple thousand dollars. I had techs telling me a "dead cylinder, coil packs .... LIKE YOUR'S .... don't go out/bad" "it's the internal motor that needs to be repaired BUT we won't know until we get it open..." I used your hose to plug test on the miss fire cylinder (#3) = No Spark. I used the same test on Cylinder 1, 2, & 4 and all of them had spark! Just replaced the coil pack I purchased in stock from Autozone for $68.00 and the Jeep is purring like a kitten again - THANK YOU!
Nice. A simple but effective way to diagnose a no spark condition. Using the test light is genius.
You make things so simple when you explain. I always learn a lot from your videos. 👍
You do a great job creating these videos for us. Thank you!
Thank You!! Your explanation and knowledge save Me a lot seek and find!!
@RnW One day, if you come across a bad coil pack, try tearing it down to see what's inside. Thx for your vids.
Thanks for video .. im trying to fix a Subaru Baja It will crank we just won't fire
Thanks you so much sir for sharing these very useful tuturials
Beautifully explained. Ty
good video and i measured the ignition coil as you did and the result the same too about 13000 ohm, however the terminal one not working when i connected it with the wire of a spark plugs, meanwhile the terminal two gives me spark.
my question is "could the ignition coil damage although the ohm is correct?"
wonderful Job! i am your fan!!
Good video but you really should emphasize not to let the back probes touch together if they do while cranking the 12 volts will burn out the 5 volt control witch mean you just fired the pcm
I have a 1985 Buick grand national with no spark I changed spark plugs and wires ignition module coil pack crank sensor cam sensor cap and I don’t get any spark to the coil pack but I do get power to the ignition module
Thanks for a great presentation
Great video.i did the signal test and my 12 volt and signal wires are on with the key off.is my icm bad?
if there are 4 wires and none of them spark then is it safe to say that its prolly not the wires ?coz theres a slim chance all ofem go bad at the same time, so its either the distributor or the coil?
love this easy lesson
Hey hi hopefully you can help me ,,I broke my coil pack and I replace it but I think I crossed the cable and my machine won’t start ,,how do I get. It back to normal thanks
There are separate coils for each cylinder as well
I have a 2008 Honda Accord with 66000 miles on it. I just got it out from the body shop and now it's showing me check engine.
I took it to AutoZone and they said the coil need to be placed I believe they said only one of them. So I replaced it but the check engine light still on. I would also like to know the working order of the coil? They told me its number 6 I'm not sure changed the right one.
Make sure you changed the right one, write down your codes. Sounds like you changed the wrong one.
I don't get it ..why not let them be connected and turn the key to see if they produce sparks.
97 jeep Cherokee 4.0 inline 6cly driving the car for awhile then it stall have to wait 30 min to started again what do I check. like your vedio
exelente video puedes arreglar my carro volvo 850
im not getting any readings no matter what pins i touched?
Could a bad coil cause a lean condition? I smeel gas when i turn my car on ive check vaccum lines and intake manifold gaskets all new o2 sensors could it be a cylinder not firing?
make the water test.
Wellington this also happens inmy car
Jamesbond Quinones same here..
Check knock sensor
Yes a bad coil can cause a lean condition. Same thing happened was also missfiring on cyclinder 2,3 and it turned out coil 3 was bad. no spark. replaced it and it worked.
This video was way too advanced for me who is still learning, it was way to quick.
I dont follow it sadly. My coil pack also looks different , which is for a OPEL CORSA B , i dont know.
The plug wire with time is the easiest and best way to test this coil pack out, yours should be similar if it has a coil pack like this. If not it's actually easier because you can just test the spark with a cheap spark tester if you have a newer car.
Don't forget to tell everyone that a more accurate measure reading would be at the appropriate temperature, which is around 70°F to 80°F -
21°C to 27°C 🤘🏼
thanks,but little slower explanation
y
G.day I desperately need your advice,is there any way I could contact u
My resistance was about 6k on both sides on a 4-cylinder 12' Jetta...which is half of the one your testing on this video. Does it matter what brand of vehicle it is?
Thankyou. I found out after looking at this video and checking the coils on my sc400, that My mechanic didn’t secure the cam sensor wires , so the cam wire was cut by the fan belt, led To a crank no start. My mechanic not knowing better, Or checking,,, excessively jumped it trying to start, leading to cooked the coils. So I towed it home and I found the damaged cam sensor wire, fixed it. Saw your video and checked coils. I had spare and changed. Great! Got my SC400 back. What a don’t understand is 2 mechanic shops couldn’t fix it. Thanks for sharing your knowledge 🙏 I will repay you. Mc, from Australia 🇦🇺
this is why I am now my own mechanic, I may make mistakes but that is how I learn and do not cost me the labor other than time on it.
great video ....... Everyone be sure to not have your fingers touching the metal on your multimeter it can give you bad reading .. thanks great video
hello dude
congratulation for so useful and timely video , it is very important to know how this core automotive part work , best regards from monterrey mexico,
Your a dead set ledgend mate. I like how your videos are straight to the point and the information is clear. Good camera work.
I've got one of these on an 02 Ford Focus that's misfiring on number 4 at idle about every minute or so. I have an inline spark tester and I can see it misfiring ever so often. Under load I have not checked it but I bet its misfiring even more.
Nice job form your fans at #how2wrench
Excellent content. Thanks for sharing.
What you do is swap coils and see if the problem transfers. If it doesn’t, check your fuel injector to see if it has power going to it. Then by seeing what the recommended ohm reading is and test with ohmmeter. If the fuel injector is ok, THEN watch this video and do all the other steps.
Much easier way to check for spark; hook up a timing light! Connect the timing light to the plug wire, start engine, light flashes, you have spark, move to the next cable. That only proves spark, it could be a weak spark, so you should test the wires and coil to ensure they're within specs. Also check that the plugs are in good shape and correct gap.
I'm thinking if you are Persian originally?
Great video, I drove my 2000 Toyota Tacoma without making fluids change after being parked for 5 years and after replacing the fuel pump; old fuel in tank, old oil still, old coolant not fluid changes I thought to drive it like 15 min to get everything moving and come to do oil and coolant change; in the time I drove it like 30 miles the vehicle raised the temp gauge, I pulled over right away not letting it reach the top of gauge and drove slowly back home; I parked and when I tried to start again it wont start at all. Called same mechanic who replaced the fuel pump; explained and he did compression test; cyl 1 and 3 have zero but cyl 2 and 4 have 180 PSI. He diagnosed a blown head gasket; he said driving the car with old fluids and low in coolant did it after engine reached operating temperature but nowaday I am getting it all apart to replace the gasket; drained the coolant and it was dark maroon color, oil does not look milky at all.....do I really have a blown head gasket or maybe the car overheated briefly and did not blow the head but the coils failed? usually head gasket one loses compression on one cyl or maybe 2 adjacent but 1-3 or 2-4??? I am trying to apply logic here at this point the head is still in the car, I am about to take it out and it would suck to find it intact! i mean it would be good but I have no car right now and have expended $1400 in a new head and parts from rockauto to replace; I cant help but wondering if I have bad coils and with this video I certainly would like to find out; I guess if i get all the way down to the head and it is intact and not blown got to backtrack and find out why compression only present in 2 cyl the way it is; in this vehicle cyl are numbered in a row from front to back 1,2,3,4, headgasket blown should show no compression on 1-2 or 3-4 or one individual cyl but 1-3?????? WTF?
I wish my ignition coil pack only had 3 pins instead of 4, and the 4 ends stuck out like yours. My pack has 4 pins at the connector. And where the spark plug wires connect you can't see the metal and so you can't reach the points of connection to the multimetet
How does one determine which ones on the coil pack are the secondarys?
I have 09 Outback with 4 pin connector , when I check with multimeter it doesn’t show anything,not even somewhere between 0-1ohm.does this mean coil pack is bad ?
Secondary coils show 11.4K ohm
My readings equal about 1 ohm as well that you say is good but my service manual says if the reading is between 0.53 - 0.65 to replace the coil pack. I have 3 dif coil packs, all read around 1 ohm. So are you correct & my coils are all good or is my service manual correct and I highly unlikely have 3 bad defective coil packs...?
Not sure if anyone will respond but i have a alpha romeo 155 v6 with a no-start. Battery was bad to begin with but due to circumstances i decided to test what i can while i can. I tested the coil pack using the method mentioned above, i on my primaries i had 0.9-1ohm on 2 of the switching circuit but only 0.3 ohms on the last circuit. Is this a bad coil or still within spec? I was expecting O/L but but with this reading its a bit difficult to say for certain. If someone has an answer please let me know 😁👌
I will be testing sparks next with a fresh battery but if anyone can give me an answer thatll be great heads up, thanks.
Hi dear ,
I appreciate if you can tell why coil plug is numbered from inside under pins
I have nissan altima 2008
Numbers on coil plug is as next
1 - 7 in one plug
3 - 4 in one plug
4 - 5 in one plug
5 - 6 in one plug
While i do not know how to arrange it in every cylinder
I just put without any idea
Appreciate if you can help
On my 04 Chrysler PT
My Resistance was 12.11 on my secondary-so is it safe to say that's bad then?
THANK YOU
Very good. But what if the are the parameters for 13 ohms? My primary was 11.8, is that OK? wheras secondary was ok at 12.7 !
How do you know how much resistance their should be ?
Is their a chart for each thing your testing?
Nice..but your fingers are messing with meter...esp at the ultra high ranges you are working with :)
Dude! Not only are you good, you're a good teacher too.
Cobby Sparks yep
Yes I love this guy for that reason .
So clean and detail to understand the lesson .I really appreciate that .
Awesome video!
Thanks for making a good and too the point video :)
Dods your ignition coil to use.. Were can i order that. i need that ignition coil to replace my broke ignition coil... Asap
What if my coil pack is brand new should i have same resistance for the secondary circuit ? I have bought one for my chevy spark 2015 i have got between pin 1 and 4 (8.96)and between pin 2 and 3 ( 8.76 ) using a digital multimeter @ 20k ohms
I did a spark test . 3 plugs have no spark and plug 4 had spark .. what would be the reason.
RATCHETS & WRENCHES, why does COP coil over plugs have multiple ignition coils? older 60's & 70s cars only use "one" ignition coils to fire all 8 spark plugs. So I'm confused why fuel injectors need multiple ignition coils any reasons why?
My best guess that either you have a coil pack, over spark plug coil packs, or a distributor. The distributor has one power sources in, it spins and sends power to the individual spark plugs.
Omg just what i needed after this 3 days of fixing my car. .
hi how do you get a spark through a rubber hose how would the current make contact with the spark plug
Great video but every Ford I've worked on only gives numbers for fuses
nice tutorial how the ignition coils work and good info as always one question though is all ignition coils resistance around one ohm always thanks for sharing.
+j georges all the ones I've come across have very low resistance in the primary coil not exactly 1 but around that. Thanks for commenting.
I necessarily dont trust ohmmeter testing other than checking surface resistance like corrosion. Reason being is a your could cut all but one thread in a wire and when you test both ends of the wire it will show very low resistance. Not necessarily the best test for resistance
I have a 96 Ford Explorer with a 4.0 the coil pack good but I'm still not getting any fire to the #5 cylender. Anything else that could be causing this issue? The wire and the plug are good
This is a great video and it helped me with what I need but please everyone reading this DO NOT default to back probing. Make sure you know what the manufacturer of your vehicle recommends for testing. Some manufacturers specifically do not want you to back probe. It can cause damage to connections and terminals. If a manufacturer says back probing is ok make sure to grab a back probe adapter for your DMM. A paper clip works but if you accidentally cut a wire or damage a wire it can cause an open or high resistance in the wire. Possibly a short to ground if it's close to metal or a terminal. Just so you guys are aware :P
Your wrong sir.... your checking for resistance and what not and its fine that will tell you it works but will never tell u if its working correctly not ever no matter what u say.coils can check out okay and have good resistance and appear magic word there apear to work good but you truly really never know if there really working correctly while under load or hot or cold conditions FACT sir have a nice day
The procedure for testing ignitoin coil pack's primary coil resistance is misleading. Subaru, and other auto manufacturers, use ignition coil pack in which the ignitor is integrated with the coil and therefore the resistance of the primary coil in the pack cannot be measure.
Hi, Thanks for the video, I have toyota corolla petrol 2002, one day the engine light came on and start loosing power (i had to high rev to drive the car), took to mechanic but the his computer cant read any code , not sure what else i can do. on low speed the engine light stays on but when i go high speed the engine light start fleshing and exhaust noise is a bit loud and feels like miss fire. any guess please?
It's useful if you understand what he is talking about, For a guy not into car stuff or basic electronics, it's too much information. And no insults are called for from smart-ass guys.
All you Aholes are too smart for yourselves.......PISS OFF ALL OF YOU. there is alot to be added to this video if ya give a shit. need more info JOSE!!!!!
Okay, I'm confused, which is not unusual. When you are testing for spark (about 4 minutes in the the video), you show the coil pack completely removed from the car. This is just to illustrate, right? I should leave the coil attached, right, and just unplug all the spark plug wires and check post individually, right? Thanks.
some coil packs have a built in igniter circuit so this primary test wont work, if you have a 4 cylinder with a 'wasted spark' coil pack like the one in the video and it has more than 3 pins in the socket from the wiring loom then it probably has built in igniters
Thank You! ! !
Your videos are Always useful. BTW some V6 engines - 3800 Series II 3.8L V6 - use 3 coil packs. 1 pack per 2 cylinders.
Can this method be used on them? Please reply. Thank you.
if I'm getting nothing for ressitance on all my secondary coil packs does that mean my coil pack shit the bed? the first test were u test were the clip goes in is good, then when I check the secondary coils( the top ones were u connect spark plug wires too) is giving me nothing, = zero for all of them, this would mean it shit the bed right = get a new coil pack for my 2010 jeep and that would be why its getting no spark
have a 98 dodge neon.. was checking ohm for the cigartte lighter. now my car dont start. pump it seem to be working, start all seem to be working. check all possible fuse are good. check coil pack also seem to be passing current.. what could be my problem?
Can one just be weak? I get spark but when I unplug that one particular it doesn’t make as much difference as the other three do?
So I get 5.3 on the primary ? What’s up with that
How about if you don't get any battery current flowing at all. For example my car cranked but didn't start and when I tried starting it I heard a click and all the power was gone.
Hey there I have a ford tarus v6 with a p0351 ign coil code. while checking for spark I notice coil 1,2,3 are fire much weaker then 4,5,6 I was wonder if this is normal or if it's signs of a bad coil.. the coil is the same one featured in this video thank awesome vid to man!
My coil pack's plastic housing is cracked, and I must change it. The broken one is 12 Volts. What happens if I put one for 14 Volts? Will it damage anything?
I have 1996 3000 gt it has no spark no power to dist. Or sign coil so any ideas
I’m getting spark at the end of the wire to spark plug
Hello, I have a Neon Chrysler. I checked it. I have 00.8 ohms and among the poles of Coil. 12.22 What do you think?
Hi ,how I can get the 12 volts going trough the ignition coil, I tested the middle pin in the connector and only put out 5 volts to the ignition coil ? Is a Mitsubishi eclipse motor 1996 2.0. thanks
I have a 2005 dodge stratus I'm trying to install a remote start says to connect a tachometer wire to the coil pack but I'm not sure which wire to connect to , am I suppose to connect it to the constant on the coil ?
Really enjoyed the way you you took the time to explain explain the difference between primary and secondary coil very informational thank you for that
Absolutely excellent, so easy to understand. I managed to test my new integrated coil on plug and found one coil to be faulty. Got it warrantied now.
would the light probe blink if you test the ignition coil "not connected" just direct from the plug?
My civic has only 1 secondary and 2 pins
This looks more like a distributor cap. Interesting how the OEMS did this differently
What if you have a coil on plug. How do you do that?
how are you doing, first of all I enjoy your videos are well explained and easy to understand. I have a chrysler 300 experiencing rough idle, when is on park it's all good but on drive as I start driving it's good but I sense hesitation and when I come to a complete stop the RPMs drop from 600 to 500 (not normal) when I got my car the RPMs would remain at no less than 550 or so, I changed the spark plugs and wires and moving to the coils on plug. any suggestions would be greatly appreciated. keep up the good work, Chimo.
I have a 2.2 liter Chevy s10 pickup, having trouble cranking the engine over. It acts like its out of time, the motor jumps and bucks when trying to start or it doesn't crank at all. Any suggestion on what it could be.
after reading comments, there ae a lot of questions, I think it might be a good ideal to explain when and why to perform this test. (misfire codes.) I am guessing that many people are doing this test without good reason.
Hey did you play in the movie 'Sicario'?
will the coil shut your car off because it's hot, my car shuts off when temp gets to 190 than i have to wait to it cool down to start it again
Could be temp sensor
Simple and effective. Your paperclip leads are a good idea. Look forward to using your method to troubleshoot.
Thank You! It`s help!
I have a 94 f150 4.9L when i do the light test I have constant light on the one that should be switching. Could this be an ignition module control issue?
Love the lessons and the way you teach them. Great job on all!
A real-world test is best............ohmmeter does not fit the bill.
Krystal Nice job! It's kinda like trying to load-test a battery, that needs to reliably supply 200-amps for starting, using a load-tester that draws
50-amps. It may catch some bad batteries, but will not be a reliable way to catch all bad batteries.
Excellent presentation: Thank you
your explaination is so clear and easy to understand.
What if when reading the primary coils i get 0.7? Is this enough ohms or should i replace the igniotion coils?