How to rule out a Spark Plug as your problem
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- Опубліковано 14 чер 2024
- Learn how to easily test a spark plug to rule it out as the cause of your engine problem. A simple and highly effective method(when done properly) that I've always used to confirm if a spark plug is/is not the cause of engine starting and/or performance problems. Why run to the store and buy a new spark plug as a gamble, which may not be inexpensive, when you can verify if the plug is the problem using your digital multimeter. Save time and money! No method is 100%, but this method has been proven to work the great majority of the time.
I decided to upload this video when I discovered that not too many people knew about this simple, effective spark plug test.
**RULE OUT SPARK PLUG WIRES with my other video:
• How To Test Spark Plug...
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**ATTENTION: If you have any concerns about removing a hot spark plug from an aluminum head, then you can also remove the plug when it's cool and heat it up in a toaster oven to 300 Deg F to perform the "hot" test. Never file down or sand Platinum/Iridium tipped plugs. "Hotter" spark plugs have a LONGER ceramic nose, and "Colder" spark plugs have a SHORTER ceramic nose. Using a slightly hotter plug can prevent fouling if your rings are worn and allowing excessive oil to accumulate on the spark plug's electrode. Thanks for watching!
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Lawnmowers now use suppression plugs due to the Delphi fuel injection systems on Kohler and Vanguard. Specifically the NGK bpr4es and bprm4es as well the 5’s too. If not the 5 volt reference in the OBC will act wonky and cause problems in the injectors as well as the coils. Just a little info on the subject :)
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what is the best spark plugs to use in a 98 ford explorer 4.0 sohc v.6
Clear and articulate, no nonsense, good old common sense, no annoying hard rock or ricky ticky music to distract. Well done. Keep up the good work.
Thanks Anthony! Be sure to rate thumbs up, share my channel with others, and look over my extensive video playlists for other great videos of interest to you.
Can we have an article about cable resistance/airgap resistance, the latter mainly in America.?
Indeed. This gentleman does commendable, thorough work and actually USES his brain... Something that, very sadly, has become very rare these days.
Quick Tip: For continuity testing or even resistance you should always try an initial test by touching the two leads together first. Its not unheard of to have bad leads or connection to multi meter that may make you think something is wrong with the spark plug for example. Just good practice.
Gee, ya think?
This was very relevent for me, precisely illustrated the issue I was having, and here it's 2020. Thanks for keeping this on UA-cam.
You're very welcome! Always nice to have viewers from Down Under! Be sure to share my channel with many others. Thank you!
Thanks for this video, I diagnosed a bad plug (which seemed totally fine), this got my generator running for $3 and made a lot of headaches go away.
You're welcome Kenneth! Many people like you have benefited from the info in this video. Thanks for watching! Be sure to share the video link with friends.
i have had two strimmers inat the same time both with poor hot starting and both had a plug that goes open circuit tip to cap when hot let it cool and the connection come back very nice to find a fault like this
This is seriously like the best video ever ! I was one of the "didn't know" people. Had no clue. I just switched spark plugs around and read codes. This is so much better. In my defense I'm Polish and I'm a girl so it's ok ;)
Hi Mr.Electronics ,man you are from the future ,you are so knowlegable man I admire you ,just brilliant.
:-) Be sure to share my channel with many others. Thanks!
Neat stuff. Every mechanic should have a heat gun (I've scored a few at yard sales so I can scatter them around the shop) and will try your method before and after heating up some spark plugs. A propane torch would also work and handheld thermometers are dirt cheap.
To quick check plugs I shoved the end of a gas grill piezo igniter into an angled spark plug boot then ran some solid copper household ground wire around the shell so the ground contact on the igniter has a path to ground. (It normally grounds thru the gas grill body.) Wrap with electrical tape and you're done. Great for detailed arc observation without running an engine.
+Ob Fuscated - My heat gun is always moving around the workshop. Damn useful tool. :-)
Neat trick with the piezo electric, I had an ignition simulator for testing but that's much better and small.
Let me make sure U hold heat on the plug till you read 300 degrees for a hot plug correct?
came here after watching project farm, both of you are great and ill be sharing your videos too, well done videos!
Excellent info! Had no idea all these years how to test plugs. Thank you👍
Nothing is 100%, but it does work very well.
I know you are dealing more with the electrical side of testing, but, don't forget to also look for signs of leaking gases around the insulator and signs of plasma staining on the insulator. Both are good indicators of ignition faults/wear and tear. I am hooked on your videos, great job.
Ttttttttttþttttttttttttttttttt
First time I've seen a video that recommends testing when hot. This is super important, especially if you have a problem with missing when warm, or even just an intermittent miss.
THis is hands down the best video on the subject Sir. Nicely done fella.
Glad you think so!
Thanks for the clear explanation.
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I just now found you channel. From reading comments on a project farm video. Holy cow do I have some watching to do. Glad to find you out there. Take care bud.
Great to hear! Thanks for watching
Nice job explaining all details, THANK YOU !
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Thanks for the great and most thorough information. GOOD TEACHER 🏁
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When I had the pleasure of working with a great racing mechanic Mario Deliotti I showed him that a plug I had out of my Alfa Romeo sparked perfectly well out on top of the engine. He laughed at me, called me something in Italian, and told me to put it the spark plug tester. I did and it sparked ok looking through the inspection window. Now I turned up the air pressure ( the tester connected to the shop air line) and at 80 psi plus it hardly sparked at all. Put a new plug in the tester and that lit up like a Christmas tree at any pressure. As an electronics engineer I have never understood why this should be but it taught me that a low voltage meter test at atmospheric pressure is worthless. Don’t waste your time just replace the plug.
Never had the test fail. Your situation was highly uncommon.
At a guess you sound as if you are in your twenties and dont appear to work in the motor trade. I have a vehicle in my own garage that has just this problem. I call BS on your "uncommon" statement, if only because you haven't have enough real world exposure to have encountered it.
I am 67 and have worked on most vehicles in an auto electrical capacity, It was just something that I surprised me as an electronics engineer, and later help me when I was designing electronic ignition systems.
Yes that is correct, the higher the air pressure, the harder a spark has to work to punch through it. However you do not need anything as elaborate as a pressure chamber to test spark plugs "under pressure". Simply open the electrode gap to one quarter inch and it will simulate it for you. If you get a good spark like that its good to go.
That's a good tip but unfortunately these were Lodge 2LH plugs with the four point electrodes.
good vid and info, I am old and have done many types of mechanics my whole life , I wasn't aware of this...thanks for taking the trouble to share friend...God bless...doug
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Great information! Thanks for taking the time to do this fine video!
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Excellent video! Thanks for posting!
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The best video on the subject I've seen. Been working on bikes all my life and learned something new. Thanks
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Better off to use an insulation tester as used for electrical installation work set at 1000volt scale /me Retired elecrician
great video very informative I've known about the lean rich hot cold what the pulg is telling you about the engine and fuel delivery thanks for taking the time to share your method of testing
Be sure to check out my video playlists and share. Thanks!
Nice tip. Thanks for uploading
Your Welcome.
Actually we use to check the resistance at the end of the Seal line during the manufacturing process. We also did dielectric test to ensure the bisque had no pin holes.
We made millions of every brand plug on the market. No one brand was different from the others.
I know some guy just crapped his pants to hear this, but Champion, Atlas, Prestolite, Autolite, Shell, Sears and others were made exactly the same with the same materials.
Genius Russell Ceramic clay is porse (having gap between Cristal) and carbon with fuet mixed oil gets penetrated during compressions created by piston , the cause of conversion to good conductor is the presence of same oil, so the Manufacturer should use cementing process of between grains gap . The easy , I obtained by soaking the center conical white clay with drops of Elfie (quick jointing liquid gum) that penetrates well in new, Un used spark plug. The life gets doubled with smooth performance. Try n see . my cont. +91 8853486995 ,
Bear Russell - I understand what you say perfectly. I always find quite funny the passionate discussions. French/American/ German/ cars is better than... something else. LOL :-)
I worked for a very well known brand that among many others components, produced ignition coils. For anything American, French, German, English and so on, even Harley (motorbikes). Sometimes even part of the production line is the same... same workers under the same roof, etc.
There are differences, but not where most people think. Surely not in the "brand". ;-) BTW the retail price is the most visible side of the story. LOL :-)
Y7
Well yeah, most products are marketed under various brand names even though they are manufactured by the exact same process.
They all test the same, and operate the same.
However, the issue occurs when the "Brand Name" is applied to the spark plug.
The moment that the brand name "Champion" is imprinted on a sparkplug, its reliability is adversely affected.
Benny, hey I would like to chat a little if you find time. I knew what you mentioned above. Been indexing decades. usavetone@gmail.com I am an engineer re engineer of a few internal combustion systems and try chatting with guy's like you, thanks
Great video, concise and thorough and not boring as some of the educational vids on youtube are, these are important facts that anyone mechanically minded should know and in case they forget its good to come back and have this as a reference. Thanks! Big thumbs up :)
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Thank you for the info.
Doug, thank you for your concise and informational video. A couple of questions...is it possible to test plug for spark while it is still in? Also, my specific application involves a non-working leaf blower, therfore i cannot test a "hot" plug; does that matter? My guess is that there are lots of people who are testing their plug because it can't "get" hot! Thanks again. dc
Awesome! Learn something new everyday. Thank you
Mike D You're welcome Mike. Nothing is 100%, but it sure does work well. Please share and rate Thumbs up.
Thank You!
Muy buena explicación ,
Tengo un montón de excelentes videos en mi canal que cubren a muchos temas diferentes, así que revisa mis listas de reproducción extensa video para otros vídeos de interés, tasa de pulgares para arriba y compartir mi canal con otros. Gracias
I bought the same tester today at auto zone it's not $5 anymore but $8.99. Bit after seeing yours had to have it. Thanks for the tips.
Glad you enjoyed the video Robert! Be sure to check out my automotive/mechanical video playlist, and product review video playlist. Thanks
Wonderful video. I put brand new plugs in my Ford Taurus, and it was missing really bad. Broke out my Meter, and two of the plugs were bad straight out of the box...Thank you, you saved my sanity !!
Gary Scott Fischer You're welcome. Be sure to check out my other videos, share, and rate Thumbs Up. Thank You!
Many thanks for the presentation. More, and more frequently, resistor plugs are being used in small engines, Does that resistor further increase the spark's voltage across the terminals ?
Thanks for sharing your knowledge very informative, it
inspired me to focus more making electrical video
You're welcome!
Automation from another vid. 🤦♂️🙄
Very informative video, thank you from Dublin, Ireland.
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good instruction . I use to clean rifle carbon buildup with vinigar .. don't know if it will work ..?
Excellent and professional video. Thanks.
great video. good info and you are not talking about yourself like a lot of youtubers do.
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Great video, very informative. Thanks!
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Thanks, learned something new.
You're welcome Ken! Be sure to rate thumbs up, look over my extensive video playlists for other great videos of interest to you, and most importantly SHARE my channel with others. Thank you
Very well done. Easy to listen to and follow. thank youl
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Very helpful and interesting. Thanks for sharing..
carot2003 Glad you enjoyed the video! Be sure to share.
First off, this is a valuable test. Over the years I've seen too many outboard and power equipment owners automatically throw new plugs into a motor expecting that to be the miracle cure. Ninety percent of the time, it isn't. But, I never thought of testing the electrical resistance of the center electrode, which would be the only real reason for failure outside of wear or breakage of the insulator.
I can't speak for today but years ago Champion plugs came with a "booster gap" built into the internal connection from boot to tip. So the continuity check would read open circuit. The booster gap was there to make sure the available voltage was higher when the spark energy actually hit the tip. The idea was to be able to get a fast voltage rise at the tip despite some leakage to ground on the tip of the insulator.
Informative tutorial thanks for sharing sir !
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thanks so much, very clear and informative
+Gail Marr
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good info . never heard that before . I was going to comment on removing plugs from a hot engine , but you covered that too . I have 4 plugs I saved I'm going to test .
Thanks for watching!
Very concise , good info. Thanks
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10/19 video thank you very much
Think about this? If the ohm reading is 1.5 ohms or more, I believe the spark plug is going bad. This is especially true when it comes to ohming out electronic fuel injector solenoids for Cummins Diesel Electronic Engines. Thanks for the tip on spark plugs. I never thought of your testing method on spark plugs. Please keep those videos coming!
First class demo thanks
+Gregor Robertson
You're welcome!
Good video, thanks for posting!
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Thank You
Awesome Video. thanks for posting! subscribing
+Matt Hernandez
You're welcome!
Muy bien ilustrado,teniendo en cuenta que los manufactureros NO recomiendan quitar las bujías hasta que el motor se enfrie pero, entiendo que al hacer las .pruebas en frió al conectarlas otra vez para probarlas calientes, las podría dejar menos apretadas para que no vaya a ajustarse mucho da~ando así la rosca estando el motor caliente y así hacer ambas pruebas, Thank's.
Good . Informative video
I used the information on this video to check a spark plug on a snow blower that was not starting and had been used once or twice. The 2nd measurement on the existing plug, from tip to the body of the plug, was not showing the results that were demonstrated in the video. I sprayed the other end where the spark should be coming and got inconsistent readings. I spent $1.90 to replace the plug, and the snow blower started immediately. Thanks for the service.
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Thanks for the info on this ,very good ,great job ,keep up the great
☆☆☆☆☆ .
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Straight up and to the point, clear speech, no bullshit. One thumbs up for you!
caliwebman Thanks Cali. Please share my channel.
caliwebman, How would shit from a bull get into a spark plug?
Very good video..Easy to understand for even a novice like me and your explanations are very thorough.
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Very good explanation thanks.
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Very good video thanks il b trying that later man
Good luck!
awesome video as always, thanks very much
Thank you!
Thank you
Very helpful, thanks.
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it's really helpful video thanks a lot man.
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Many thanks, this was of great help.
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As a Jet Mechanic I am glad you pointed out that the electrode could have cracks that and I might add that sometimes the cracks are not noticeable when the plug is cold but when the plug heats up the electrodes expand and causes a lack of Spark.
It's funny watching this video I just went out and bought a tester this afternoon to test my Spark plugs in my new jet ski that I purchased that is not running and three mechanics have worked on and can't figure out why it wasn't running so I picked it up for 15,000 pesos in the Philippines with a trailer that's worth 25,000 pesos LOL because they couldn't get it running
The motor itself according to the Spark plugs and lack of oil runs properly or did when it shut down so it hasto be a spark issue or electronics issue.
Either way in a short period of time I will have ruled out any breaks in the electronic harness with the tester I purchased this afternoon and from there it can only be power pack which is as you note a sealed unit and must be replaced as a unit as a last resort.
Absolutely ridiculous price of the electronic power pack in a jet ski GSX limited-edition SEA DO,,, $1000 plus shipping but it will be cheap if that corrects the problem considering I just purchased a jet ski worth 4000 American dollars for about $350 with a trailer that's worth more than what I paid for the unit and the trailer itself.
Good upload and I will share it to Facebook.... not that any of the dweebs on my Facebook account would understand what you said LOL
And I subbed your channel
my friend I have been living in the Philippines for five months now and have in a beautiful Apartment with a view of an ocean which is about 50 yards from my apartment and deck which makes my view in Florida look like a Manhattan tenement LOL
I have a white sand beach and Miles beautiful coral right behind the house and I just purchase a jet ski that I am working on in order to travel around the Philippines via the ocean traveling method...
go to my channel then look at all the videos of over 100 I have made of the Philippines is a beautiful place... once you get past the fact that the people are basically not very well educated but are pretty much friendly to the American dollar and to the people and have them so I am enjoying the lifestyle here immensely.
To see where I live you can Google
Wish You Were Here in ALONA BEACH
and thanks for stopping by
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$1000 for the CDI/power pack.....what a bunch of criminals. I would try and remove all the potting material and swap out some components before I bought one. LOL . I would do a continuity test on every wire from point A to point B. My jet ski had one wire that corroded inside the insulation. Luckily I found it.
electronicsNmore that is precisely why I bought the meter a.k.a. to test each and every individual wire in every part of the harness From A to B.
All it takes is a small crack in the insulation in a little bit of salt water and it will corrode internally as you well know.
Plus if I showed you the video I made of the harness you would see that the three so-called mechanics peeled off some insulation about 3/8 of an inch long and twisted the wires together without cleaning the wire itself prior to twisting it which means it may not have any continuity whatsoever because they twisted oxidized wires together not knowing anything about oxidation because they are not mechanics in the true sense of the word.
I however went out and purchased a nice little wire brush some flux 40/60 solder which is still legal in the Philippines I'm the properly spliced them together laterally like this supposed to be.
Went to 12 stores in the last week looking for some heat shrink... and no one even knows what it is here in the Philippines so I purchased some 1/8 inch diameter clear hose used fish tank filters and after the joints are soldered I will put some black high heat silicone over the wire and slipped the tubing over that which I'm sure will be sufficient to keep it from getting wet...
The machine ran perfectly until it was left unattended for a few months and when the man went to start it again it just didn't start so probably the electronics is not the issue and probably more like one of the three fuses I found that were blown??
Do you think? LOL
We shall see,,, it's the 1494 in. cubic centimeter engine and if you look at it in the video I make this week you will say it looks like it just came out of the factory however when you look at all the cannon plugs you can see that the high-quality brass male and females are completely oxidized.
So I will take my little files and drill bits and polish them up in an out.
Between that and a proper soldering job and testing the wires themselves I should have ignition when I'm done with that.
There are some heat sensors on the top of each head and also in the exhaust loop and I'm not sure if they will shut the motor down what I will check those as well and the tubing that goes to the sensors.
This is my first jet ski and it didn't come with a service manual so I will look online I'm sure it's there but only purchase this machine three days ago and this is not my livelihood is now my hobby which I devote 10 hours a day to anyway LOL
If I have any questions I will be sure to bring them up on one of your pages after I do some research on your videos if it is not covered somewhere that I can find?
If I don't I still believe it is something a lot simpler than the power pack and that is my last resort
and you are right it's highway robbery.
Okay my friend thank you for returning my comment and best wishes to you from one mechanic to another.
Michael
Where do you work at? Pratt & Whitney?
HoodwinkedbyanAngel Michael Fazio I am so glad I came across this video and y’alls ‘troubles’ after acquiring these sea-doos. I myself have been given one and it too was a ‘it ran perfectly when I shut it off but will no longer start’ scenario. 👍👍 I say “perfect!” as it too does not have any spark. Seeing as I love electronic/electrical type work I welcome the challenge...and hey, for the price?(free) I am ahead of the game already if it actually does need a part or two. Any recommendations where I should look first on one of these beasts? I have done two stroke ski-doos of all types so that part is pretty familiar, just not their watercraft. You say the ‘power block’ can/may be an issue?..I’m guessing it’s to do with leaking water internally causing it’s many quirks.
Let me leave y’all with one recommendation when cleaning up corroded wires....you will thank me for this later..trust me. Whenever/where ever you have corroded wires needing to be reconnected and you find ‘sanding’ them or ‘scraping’ them with a blade don’t quite do it, try dipping them in muriatic acid from the hardware store. This product is used for cleaning and etching concrete in pools etc. NOW BE BERY CAREFUL WITH THIS STUFF!!! IT IS HIGHLY CORROSIVE AND EXTREMELY TOXIC!! USE IT WHERE THERE IS EXCELLENT VENTILATION AND KEEP CLEAN CLEAR WATER NEARBY TO NEUTRALIZE IT WHEN DONE. It takes only 10-20 seconds of dunking this in the acid and it’s done..clean. Quickly rinse it off with the clean water and dry it off completely. Do give it a few passes with the emery cloth or sand paper to get that brilliant copper shine back which makes it the easiest to solder. I know the good heat shrink is the best but I see not always available. Check for a product called ‘liquid tape’. It’s black in colour and smells a lot like contact cement. (😮 💡 😮☝️👍...did the lightbulb just come on? 👍😉) ...I believe if there is no liquid tape available, you may be able to improvise with the contact cement...I’ll leave that up to y’all to figure out 💡😉🤞👍 Spread this liberally on and over the newly soldered connection right onto the wire’s insulation so no water/moisture can penetrate it. Cover that with electrical tape to help stop any possible abrasions that may occur.
Thank you kindly for any tips you may have for me and I hope mine will come in handy for you. With any luck it won’t take me long to repair it as up here in northern Canada, our ‘Sea-doo season’ is already awfully short as it is..from October to June the ice makes for some powerfully rough and cold boating on a sea-doo anyway. 😆😆😁😄🤣 All the best from a fellow mech. and watercraft enthusiast. 👋👋👋
Good video, very understanding.
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What do you think of spark plug blaster cleaner machines?
One small point to contend... I worked in auto part stores for over 15 years and have learned from reading the indexes that the reach of the ceramic on the combustion side of the plug is what controls the heat range. when the tip is recessed (protected from heat) it will be a cold plug. When the tip is projected into the combustion chamber, you will have more exposure to heat , and more ceramic material to hold the heat. Other than that your video is correct!
+john smith
Hi John. This issue has already been discussed in the video comment area, and I also placed annotations in the video to clarify things I said. :-)
Thanks For Watching!
perfect explanation .thanks
You're welcome!
Awesome video, thanks!!
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Very well done video. You explained it better than I did. (I did a short rant on replacing plugs)
Thanks Bruce.
Very informative.
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thank u for this video keep up the good work
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Really good educational video thank you.
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Thanks
Very good job 👍👍👍👍
Nice video 👌👌👌👌
Very good teaching 👍👍👍👍
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I have heard different values with ohms readings (multimeter) for small engine spark plugs (mower, snow blower, etc.). Can you set it straight for me? Some say a good spark plug should read 500 to 5000 ohms. Others say 4000 to 8000 ohms. And still, others say 5000 to 15000 ohms. Which is it? Or, is there another standard of values to use?
Very Very Good Bro Tnaks
very good explanation
+Harris Thiru
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Good info
Thank You
HI, good video....I have a question on my champions spark plug UL77V
when I measure the resistor like you did...using an ohm meter Fluke 60M
from the center of the electrode to the center tip the reading for all is over 60M
is this normal reading ? the test was perform on a bench (cold)
Thank you
Mo Mo I do not know that particular meter, but if you are getting results that do not match what I showed in the video, then the plug is likely bad. You should have no reading between the center electrode and metal threaded body of the spark plug using the highest ohms range on your meter. Perform all tests hot and cold to rule out the plug.
Thanks For Watching
Great vid!
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Engines usually miss at idle or under acceleration/under load. Can either be a faulty spark plug/high tension lead & or coil pack. Some engines dont have high tension leads, but a coil pack for each spark plug. When you accelerate/more power, throttle butterfly opens increasing air supply into motor. Fuel injectors stay open longer allowing more fuel into motor. Therefore the ignition coil increases voltage for stronger spark under more demanding internal engine conditions. You can also test each individual high tension lead using ohms/resistance scale on your multi meter for either open circuit or very high resistance reading. As a rule of thumb, high tension leads should have anywhere between 7000 to 12000 ohms "per foot lenght" of high tension lead, (7K to 12 K scale). You can also test your ignition coil pack in a rather crude way, like a bush mechanic without any tools. Start your engine, let the motor reach normal operating temperature. Remove nut or bolt that secures each coil pack to the engine. With the motor idling, gently lift the coil pack slightly off one spark plug at a time so you can hear the sound of the spark jumping from the coil pack to the spark plug. Dont lift the coil pack too high off the spark plug. You will hear a specific normal spark rhythum. Your listening for an an irregular/abnormal spark sounding rythum. That will indicate a faulty coil pack. This test is limited to engines you can access the coil packs individually whilst motor is operational. Unfortunately some engines, wont permit this limited test. Be sure to wear rubber gloves & tools that are insulated. Cheers from 🇦🇺
I have a snowmobile that eats plugs like smarties. Sometimes only get a couple minutes out of them. The plugs test good but will not spark. I've even tried them on different machines. The snowmobile is a 3 cyl 2 stroke. It's not the same plug that goes bad either. I'm very confused. This system fires all 3 plugs at the same time with 3 separate coils. Any Idea what would cause a new plug to blow but still test good?
Thank you for good info
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Good Explanation
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Excellent work buddy.
Thanks! Please share.
thanks for the tip
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Thank You
What is the range of KΩ you are supposed to get with automotive spark plugs with an internal resistor?
You said roughly 6.3KΩ but I need to know the exact min and max!
With 2 pin COP ignition coils it's:
▪︎ 1.0Ω or less for primary coil
▪︎ 6.0-8.0 KΩ for secondary coil
I would appreciate it if you can tell me the resistance range for a standard copper E3.48 DiamondFire spark plug or any standard 98%Copper with 2%Nickel spark plugs and Platinum or Iridium if there is a difference
Great video. I learned a lot. Thanks
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good one.thx
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Hi can non resistor plugs and plug caps. Hurt the c.d.I. on gy6 scooters?
Nice. Thank you.
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Had to learn this the hard way. Wish I had seen this video first....
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In my opinion it's up to u or whoever is performing that task . Most mechanics should know how to test plugs . If u don't have time to test the plug then replace it . Or if don't have money to burn then test it. Do whatever works best for u .
Good Evening . Thank you very much for this video. I want to ask you this: all spark plugs - no matter what brand or if they are NGK all types NGK new ones when the readings show the same ohmic resistance? E.G. the NGK (BKR6EQU), (6002) new how much should it read? New I had not measured it but at 54,000 kilometers when I changed them and measured them they show (4.16) k.
Regarding all this, what is your opinion?
Thank you .
You need to refer to the manufacturer's spec sheet.
Nice video. I seem to have better luck with the NGK's in small engine applications as opposed to Champions (Federal Mogul). Thumbs up and shared.
one of them was 3500 the other one was 3998 is that a very bad reading one spark plug well fill up with oil could this be the spark plugs and idles ruff.