Great videos. Thanks for taking your time to do this. 90% of mechanic's are parts changers. Finding the real problem is key to being a truly great mechanic.
I could have figured that one out without a computer. You heard the misfire. Unplug the #1 coil and the engine would have ran worse. Unplug the #2 coil and the engine wouldn’t have changed. Swap #1 coil with #2 and the misfire would have moved to #1 cylinder. Change the #1 coil. Yes I have done this before.
You are an incredible mechanic/diagnostician. Legend. I would love to learn from working along with you. I would learn more in a day than a year with most mechanics
Love your channel, Dan. It's like the olden days of Wheeler Dealers with Edd China doing all the fault finding, fixing and explaining. We're all better car owners thanks to you. One suggestion: buy a lavalier / lapel / clip on mic (whatever you want to call it) with a wireless receiver plugged in into your camera. If you need to put up a crowdfunder for that, I'd be happy to pop in some money.
This is the best car diagnostics channel I've seen on youtube, by far. I love the kit you've got! Can you talk about the prices and whether and how good are cheap home units and about typical rental options for expensive equipment?
Wonder if current and duty cycle reading from an amp clamp tried on each coil would have isolated the anomalous (misfiring) coil. DC amp clamps with Hz and % are cheap as chips nowadays.
Dan, your the man! You actually explain this stuff in very easy terms. You make it look so easy. Keep up the great informative videos please I’m sure we all learn a lot from you.
Dan, i would like to thank you! I watched your videos and i got so intrested in car diagnostic that i immitiately went to mechnic shool and gave papers in and car diagnostic one year trade schooling starts from next week already! All thanks to you, always have found it intresting but way you teach got me really thinking that this is the way i want to envolve in future in my garage workshop.
It’s a real joy to see your videos, I am learning alot and love your detectives work. Nice to see that your children is involved also! Thanks from Sweden
I watched another channel from a guy in England (I think) who used a coin on top of the coil and a standard probe to pickup the signal from the coil. He showed that by not using the coin he got no signal but by replacing the coin on top of the coil, received the signal again. He said it was a tip he got from an older mechanic he was working with. Pretty neat!
Great video Dan, I love that you had your children on camera. Beautiful family. God Bless. I have a 2008 Honda Civic with the same noise at the exhaust but no codes, looks like I have a bad coil also, maybe. Thanks for the video, you gave me a place to start looking. God Bless.
nice to see both of your youngsters taking an interest keep it up kids your at a better age to lean this than I am but bcause of yourdad I have learnt more than I all ready knew so it goes with the never too old to learn
Hi Dan Been watching your videos and they are great with really good explanation and I am learning loads, Keep up the great work it’s appreciated 👍👍👍👍👍
Great video. Awesome current waveform diagnosis! My amp clam is one of my favorite tools to use for coil diag. Unfortunately I don't own a cop tester or paddle probe yet. Maybe a Xmas present lol! Scannerdanner used to say coil amp wave forms should have a slope as the current fights resistance as it builds a feild, shorted windings equall the straight up line you showed, if it was zoomed more you would see a very clear straight up line. Great video, you have a lifetime subscriber!
Wish I could have a mechanic like you take a look at my car, I've been having a fault exactly the same as this. I've had all sorts of work done on the car (part changing by guessing mechanics) and it's cost me a fortune and my car is still faulty.
Awesome video! I’ve been having a similar problem on my Nissan Xterra! Had a intermittent misfire under load (2k rpm) and then sometimes at idle, no codes. The other day the cylinder was dead enough to finaly throw a check engine light! I’ve never been more happy to see a flashing check engine light! Swapped the coil from cylinder 3 (the cylinder at fault) to cylinder 4 and now it’s a waiting game 🫣
I think your description of a transistor being a relay is correct. When it's used to switch current on and off, it is working as a relay. When it's used to modulate a high voltage or current then it is working as an amplifier. The relay analogy is a good one. Great videos.
HI DAN, IMMEDIATELY VERIFIED MISFIRE BY HC NUMBERS. IT IS A VERY HANY TOOL. NEVER FAILS. NEXT STEP OSCILLOSCOPE CONFIRM DEFECTIVE COIL. VERY PROFESSIONAL APPROACH; DIRECT TO THE ISSUE. YOU MADE IT SO EASY; THANK YOU. ALL OF IT LOGIC EACH STEP OF THE WAY. YOU ARE A BIG ASSET TO THE AUTOMOTIVE INDUSTRY. KEEP UP THE GOOD WORK.
Inspiring! My forester performed strange: daily short drive is fine, but got misfire at cilender 3 n 4, after 1 hour on highway. Can start again a few minutes later. Machanic suspect aged coil inside, but not sure
Thanks Dan, Just wonderful. This really helps me. In particular, I have BMW motorcycle with the same syndrome. And, now have a good idea how to go about troubleshooting. Those cool tools and software.... very interesting and fun. Though, I would guess a fair amount of investment to set up shop. Best regards, Stevesocal40
Great quick video mate. Wish my waekon COP quick probe was as clear as the scope to read! Time to upgrade I feel! 😉 Ps. Great to see the kids learning young but hope ur boy wasnt sitting on the customers car...😯 Pps. Keep up the great team work 😎
Great video Dan and family! I wish you could have shown the HC afterwards as well. I know your current ramp verified the fix. It would've been nice to see the after shot with gas analyzer as well though. Now your a professional and I'm a newbie. So would the HC still have been high for a little while even after the fix because any unburned gas in the exhaust system would've still been present until the catalyst warmed up enough to burn those gases or emitted them into the atmosphere? Thank you sir for all of your videos! I've learned so much from you Keith (new level auto), Eric O (sma), Ivan (phad), Paul (scannerdanner), oh and what not to do from Scott (Scotty Kilmer) Thumbs up as always!
Great to hear y RU-vid helps, that's exactly why we are making this video. That gasses don't get stored but just pass the exhaust system. So they are gone in a moment.
Good video and explanation. What would a wave pattern look like where coil is connected by a plug wire and a short is between the plug and engine? In other words not all of the spark is getting to the plug gap. Thanks.
finaly found a video thats pointing to a problem i have on my car. it's a 1996 523i which has the same misfire symtoms, but only when the engine is warmed up, misfires are only there when idling and no fault codes pointing to misfires. when revving up the engine, misfires are less noticable, engine isn't vibrating while driving. misfires are best noticable when listening at the exhaust tip. hope i'll find a bad coil on my car.
I LOVE seeing the kids getting involved, especially his darling daughter! I loved helping my dad work on cars, and learned a lot of useful info. I helped him bleed the brakes as soon as my legs were long enough to reach the pedal! He made sure I could change a tire by myself and check all the fluids and other important things. Always keep extra fuses in the glovebox, and a roll of duct tape can't hurt! Nowadays, I also keep an OBD II in the glovebox too. Daddy's been gone 25 years, but a day doesn't go by that I don't think about him, and his lessons for life.
