Here’s Another Way To Test Misfires Even When You Can’t Easily Swap Spark Plugs Or Coils!

[@douglasphillips1203]

I once had a bad OE coil for a Mazda. The coil itself was bad, but it would misfire totally randomly. drove me nuts until I borrowed a scope and was able to see it happening in realtime. Dealer actually sent the coil back to Mazda for defect analysis because of how it was misfiring. Crazy stuff!

[@2491kridge]

Quick tip that I think you forgot to mention is to look at the side of the porcelain for carbon tracking, I’m sure a lot of people won’t know what that is or how to identify it, other than that all great tips

[@nclivin4220]

Yeah I've seen it only a few times but it seems to be happening more often with newer engines.

[@th0r904]

Yes, I want to see more ignition stuff!

[@tworaccoon_tv]

Love the scope videos! Would love more ignition videos.

[@davidmatthiesen6876]

I would like more scope videos

[@DD-gd3fr]

Yes more of these vids, thank you Sherwood this was fantastic, I'm learning scopes that old one looks easy to use..🥴

[@robhunter2435]

Love the scope and ignition Waveform videos. I am a DIY person and do work on several vehicles myself.

[@DependableAutoTruck]

great video was talking to another mechanic about this same subject today and your video pops up tonight

[@victorhoyt4352]

I like the GTC 505, but I also use the hantek wand with a little hand scope too. You guys are awesome btw!!

[@sojibrmx866]

❤❤❤

[@MarzNet256]

Cool. I was able to get a very clear ignition waveform using a US quarter on a coil with a back probe pin laid across it. I also found the power to coil and used an ampclamp with a pico 2204A to capture a current waveform. It's nice to see the amps and voltage plotted together. Car is a 2006 Toyota Matrix with 226k miles.

[@wrenchposting9097]

Nice trick thanks for the tip

[@thomaszavacki5647]

please more ignition video's

[@alexlongpre4527]

I sure do would like more waveform stuff. I've seen many on other channels, but the way you explain stuff just go through easier with me. Thanks for a great video once again.

[@bryanbiddy6582]

Thanks again! I have been out of the game for a few years! I have started a new job as an Automotive Instructor in my community. I want to give my students the best education possible! I enjoy teaching them but realize that I have to catch up on the electrical systems.. new technology! I use your videos to catch up! Thanks for all you do!

[@alrifainidal]

Thanks for this info. I would love to see more ignition waveform

[@jlwoot]

Adding more to our scope interpretations knowledge would help us all!

[@GAH4444]

Great video, thanks for sharing your expert knowledge and yes more ignition waveform videos please🙏

[@philwarden7937]

Great video. Would like to see fuel System video

[@MoparDan]

Another informative video, thanks Sherwood. I’m glad to be a subscriber of your great channel. As a DIYer I recently did a modern tune up early so that I could learn more about the Chrysler Pentastar engine that powers my ‘12 Chrysler 200 Touring convertible. I did closely examine my six coils and the spark plugs I changed out. Everything looked fine since my convertible only has 76,000 miles on it to date. Boy did perform nice after a throttle body cleaning, MAP sensor cleaning, intake air temperature sensor cleaning and a new WIX engine air filter!

[@jdesaavedra0432]

These are everyday issues that all owners/DIY face. Thank you for coving this ordinary stuff. I found the best high-mileage tuneup also invoved throttle body and MAF cleaning. Although my 180,000 mile 2006 Highlander ran well, the difference in smoothness and ease of starting was dramatic. At 200K, it runs smoother than new.

[@usamaarshad9041]

YOU ARE A REALLY KIND AND GREAT TECH WHO IS TEACHING OTHERS INCLUDING ME❤

[@JimmyMakingitwork]

I was going to recommend the GTC505 but it looks like some already have. Also some viewers might not be aware low compression will also show lower firing Kv.

[@provolone1876]

Would love to see more on the topic Sherwood

[@geraldwardrop]

Yes I want to see more ignition problems

[@dannyd.8753]

Cool video. Like your teaching videos.

[@bartscave]

Thanks for sharing! I do like the scope videos, especially interpreting ignition patterns.

[@martyisabeliever]

yes more difficult access ignition and Cam sensor videos plz.

[@ThunderbirdRocket]

Very well articulated ! And extremely complete !! Thanks !! Tink can do an under car inspection with a creeper or lift .

[@alexgoldstein7997]

Need to get one of those probes. So cool!

[@elcheapo5302]

Thank you, gents. Great video. Can you just connect the wand directly to a scope or do you need to use an attenuator? Or is the wand just "interpreting" the KV and only sending a few volts to the scope? I realize it's inductive and not actually getting zapped by the secondary energy. Thanks!

[@bartscave]

You don’t need an attenuator for a kv probe. The actual input is millivolts.

[@MichaelNomura-i9n]

I don’t get it?

[@Nozinbonsai]

Very interesting, beyond most people's needs, but really interesting 👍 loose plugs can happen too, surprised me .must be long life plug and aluminium heads.

[@HYBRIDEVMASTERSGARAGE]

Great Video n Content!! . I used to Diag Vehicles with my hands to Feel the Beats, Now I have to be a Master ''Electrician'' to fix em .

[@alanrodriguez7341]

Good video. Nissan Pathfinder ignition coils that were around 02 would separate between the coil top hat and the rubber boot assembly ( in multi) pieces. Told dealership and argued that it was not a problem. Even with low mileage not a good design. Nissan ofJapan should should admit there is still material control issues.

[@johnhowell224]

I enjoyed the video. When I get off work restrictions. I've got to figure out a random cylinder fire on a 01 Honda CR-V EX AWD. I hope all is well and everyone is okay after the hurricane that came thru down there in Florida and Georgia. I live in Tennessee.

[@sstrongful]

Yes, definitely more scope diagnostics.

[@Pares7594]

Great Video. Thanks 👍

[@JohnSvensson-j6m]

Another great/informative video

[@tundrajt]

I am fighting a misfire on a car I just bought from a friend. 2012 Toyota Camry with the 2.5 2AR-FE engine. Checked it with my scan tool initially and had a P0303 along with several ignition coil codes for A, B and C circuits. I swapped around the coils with 2 and 3 and cleared codes and took it for a spin. Expecting to see a misfire on 2, I was shocked when I ran a scan again and found a pending code for Cyl. 3 again. Well, I figured maybe a bad spark plug or fuel injector. Pulled the plug on it last night and found HEAVY carbon. Hmmm….so, I put a new plug in it and ran it for about 5 minutes, cleaned the old plug and swapped them around again. The new plug when pulled smelled heavily of raw fuel. That confirmed it - a stuck open fuel injector! The car would run awful at lower RPMs but smoothed out around 2500 RPM and higher. Ordered new fuel injectors today and waiting for them to show up. In the meantime, I dumped a whole can of SeaFoam in about 5/8 tank of fuel in the hopes it can maybe loosen up the injector and make it work again. Didn’t have a scope to help me - just my experience, my scan tool and my sense of smell. But yeah - I hear you on the scan tools offering different info. I have a Snap-On Solus Ultra and the PIDs didn’t give me any misfire counters. In fact, the only time I have seen it is on GM vehicles.

[@paulmuff9883]

Great video many thanks 😊

[@CosmoTigato]

A lot of great information. Thanks for sharing..

[@sheerwillsurvival2064]

More good stuff 👊🏻

[@rapierville]

Great logical explanation!

[@cjayjayjay2973]

Love the scope videos

[@QuintonLindsey-d5q]

Can you do a video on the fuel system cleaning?

[@scotttrent4589]

Amgle speed ratchet is the best...for me. On plug removal

[@mikeabasolo1531]

Great video

[@luthergrant7336]

I use obd generic mostly for misfire counters on Toyota, Nissan, etc. But a scope will show you what type of misfire.

[@Santiago_Ordonez_]

Nice. 👌

[@hiromiya3365]

My car had a miss on cylinder 2 with a bad coil that was sparking in the plug tube, i taped it with the electrical tape and fix the problem, no more miss.

[@johnchambers12]

I learned the electrical tape trick from my dad when we had long leads on the plugs and it worked to get me to the correct plug for many years. We used to cut our own wires back then so i would replace the bad wire.

[@Stopcryinguwuss]

Ngk and denso plugs are good but make them iridium. They will last a long time especially if you have to move the stupid intake manifold to get at them.

[@mkatalin09]

you cant just put iridium plugs in every car, doesnt work like that

[@JimSix-jo6hf]

I always grab my lazer thermometer for a misfire, faster than the scanner, the cold exhaust runner is your misfire

[@professordandrea1448]

Hello, Can you kindly post the link to some of your diagnostic tool suppliers. You posted a video load testing on a jeep with some testers I wanted to order but you did not post the link.

[@jasoneyes01]

What is a quick way to find a slight infrequent misfire due to a faulty fuel injection or ignition wiring harness. I’m finding these on alot of older BMW..Audi.. Porsches. After the customers thru the parts cannon at it and thought they needed a valve job. Finding the current limiting wire is tedious loading the circuit and doing alot of wiggling. The scope would have you thinking bad coil or injector. These hot running thermostats are turning wires crispy. Also V8’s can draw 20 amps per cylinder bank for the injectors thru barely adequate gauge wire. I have not found a video on KZbin covering this topic.

[@johnhill3644]

absolutely more ignition. difference between primary and secondary wave forms. good and bad. and what settings to use. could you post a list to copy setting for different components thanks

[@jameskelly2515]

❤ Tank!!!

[@KeithWheeler-ey1pw]

What about showing ways without the expensive scanners.?

[@alexdragomirescu5084]

Like what? An old screwdriver or a 12v bulb?

[@kc360awareness]

@@alexdragomirescu5084 he did show you the simplest way…. Just look at it. Look at the plug, the coil/boot look at the porcelain too.

[@richardpope9985]

Oscilloscopes are very affordable now. Look at the FNIRSI 1013D, $140, this one has a nice wide screen, and or the HDS2102S Oscilloscope $240, there are several to choose from. The inductive probe is Hantek HT25COP .$83.

[@marypyle6190]

How about carbon fouled spark plug video's on classic car's?

[@rodvan-zeller6360]

Do you have a GTC 505 ignition analyzer?

[@michaelmiller7601]

Can we have some more😊

[@philh9238]

So how do you know if you have a weak coil and an arcing coil? Both would have low firing line kv’s?

[@johnchambers12]

I don’t know if you have ever tried electrical tape to re insulate the coil for another easy test to prove out that spark leak issue on the coil

[@alexmessina7652]

Definitely want to see more ignition waveforms …. But not the perfect cases ie dead misfires that are generally easy to pick. Rather intermittent misfires and isolating cause/cylinders … poor fuelling misfires, collapsing lifters, intermittent valve leak misfiresetc .. I’m talking real case scenarios that often show conflicting data, or require close interpretation, not the perfect clear cut cases 😉 18:21

[@AlonzoJ-pf4dt]

Coil confirmed

[@AlonzoJ-pf4dt]

😊

[@sojibrmx866]

❤❤❤❤❤❤❤

[@georgerocks5191]

Pulling a sp from a hot engine- do you feel lucky?

[@ronseconomymachine-gm8ek]

like G say's save your foil from lunch

[@MsFireboy2]

So Sherwood in selling the job due to mileage on the the vehicle would you recommend Six Spark plugs and Six coils? Stating All coils are the same age and if one failed the rest could follow. Thoughts?

[@MichaelNomura-i9n]

You can see the carbon tracking at night.

[@Hybriddiag]

My question is why on nissan cylinder 4 coil and plug gets bad?😮its 75%of the time number 4 and 15%number 1 ....its strange...

[@mike-s8n8y]

Diyer's and scopes, . Diyer's and parts stores 😀😀😀😀😀😀

[@nordicpride9708]

One can read scanner danners book and become quite versed in interpreting a scope. You act as if you are a physician… just a mechanic there bud. Get off your high horse. FWIW I’ve been a tech for 20 years. And I’m always learning new things. You should be more open minded and not such a jackass to the DIY guys

[@mike-s8n8y]

@@nordicpride9708 Sorry if my comment offended you , it was supposed to be light hearted and i think most would see that .

[@KeithWheeler-ey1pw]

You need to let the engine cool before removing the plug…( aluminum threads)

[@kc360awareness]

First!

[@ThunderbirdRocket]

🥇

[@kyletuttle9064]

Good reminder for basics. Thanks for sharing.

[@ShawnKirk-w3m]

Love the channel but Yall beating these scope videos to death here lately. Would be nice to see you kick a few repair videos off and do a few repairs the old school way like before scopes became so mainstream.

[@mandytuning]

Probably old cars dont visit their shop.

[@johnthrossel9981]

Old cars need scopes too. Before obd2, cars didn’t tell you what cylinder was misfiring, or why it wasn’t starting. I work on mostly 80’s and 90’s cars and use scopes constantly. We even have the scope he was using.

[@ShawnKirk-w3m]

@@johnthrossel9981 To be 100% clear I didn't say they were all old vehicles. I watch the channel and I know better to the best of my knowledge anything I've personally seen them work on in video is all modern vehicles. I also agree Scopes is a very valuable tool to have in the shop and with as affordable as they have become there really isn't any excuse why any operating shop wouldn't have one and yes pre 96 / OBD2 Scopes was better than gold. All I was saying and it was just for me personally that just about every video here lately looking at a scope the entire video is getting a little monotonous and that it would be cool to see them do a video here and there kickin it old school you know where we cuss anything and everything and maybe kick a tool or two until we figure it out and get it done. I know as a business point it wouldn't be viable and it would just hold stuff up for no reason and that would be stupid. But I'm talking about one of those random videos they do sometimes on the off days when there's no rush where it would make for some content that's a bit more on the ventures side but still not impact the regular day to day operations.