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Really great video and very transferable to the traditional 'points & condenser' type systems that I often work on. I have a question also.....based on a 12v system, +ve earth, dynamo, 6 cylinder vehicle, 36 deg dwell angle, 3.0 Ohm coil. On one vehicle, when running I noted approx 12.4v at the +ve terminal of the ignition coil and only 6v at the negative terminal, both versus earth from the battery. To me this seems like a huge voltage drop of over 6v, I'd normally only expect to see perhaps a 2v drop. What are your thoughts on these values? Does it suggest that there is something wrong and arccing to earth somewhere? Many thanks....

Awesome

13:25 Does the primary ignition voltage waveform provide the same diagnostic information as the secondary ignition voltage waveform? I mean, they look the same.

WHY would my new motorcycle start knocking right after a service at the dealership ??? ECU update and/or oil change. Help please.

I have a pinking noise in my new Triumph T100 twin 2020.....only hear it at idle....start about 20 seconds after a cold start....its gone as the motor warm at about 3 mins. Sounds like tapping.....thought it was mechanical.....but as an experiment I took out the INTAKE AIR TEMP SENSOR. Lay out still connected.....and at cold start heated the IAS with a hair drier.....the ping or tapping is not there if I do this.....far as I seen its making the ECU think the outside air temp is hotter than it is. Whats going on.... What gave me the idea to look at the IAS is that on hot days....I hear the tapping sooner after a cold start....and it goes sooner. Anybody give me any clues.....its quite common with my type of engine....no dealer can explain it.

The ones I've seen look like a sine wave within a sine wave.

No where on the internet do they use the tester like you show.. The instructions with the gage also say you are doing it wrong.

No where on the internet do they use the tester like you test. The instruction also say you are wrong.

Hi I have lexus is200 year 2000 the car is stuck in open loop and it won't start I've been trying to get it going for months now. Do you have any advice please? I tried spray easy start through the intake and there's just a small fire to try start. There's spark on all 6 cylinders.

Your video is provided by Google. ❤

USA,mazda 626 GE 2.0 L 1995 year.Mitsubishi ignition distributor with S1 hally sensor.Can someone help me with the correct electrical diagram of this thing.the commutator has a 6 pin connector and there is also a 3 pin connector on the side of the distributor.The injectors spray gasoline but there is no spark in the distributor car will not start.

Greetings: I agree. My explanation may have been identical however U have a more simple way of communicating it. I am very technical and meticulous. Good job. Thx 4 the share.

This is amazing

thank for explain. i have dodge raam 21 6cyl when i drive on high way its gose very well but when i reach speed 140km its stop speeding and the rpm gose up the dtc i have close loop down stream...?

Great lesson

Nice tutorial!

Wonderful information. Thank you! Really good lesson!!

Does a wet compression test require a special tester?

Me being me, I have at least a hundred questions, but hands down, any tech that has a scope and wants to analyze ignition waveforms needs to watch this video.

What if I have wet cylinders-gas- from rich carb situation or weak spark or a combo. Should I remove carb and plugs and let air out/dry for s few days, maybe brake/carb in the hole to promote drying prior to compression test?

The Mazda I had in my 20s ran on this engine design. Kind of a neat engine.

Thank you very much. Which O2 sensor you were talking about? The upstream or the downstream? I suppose, the latter one?

Liked the string theory , brilliant presentation.

My vehicle when I bought it as I understand is tuned only to run open loop as I don't even have O2 sensors, It run's perfectly fine. But the fuel economy is horrendous on idle in summer (122 ambient air temp) Will adding the O2 sensors and retuning the vehicle to closed loop. Will that improve fuel economy?

Have 2019 ram 1500 5.7hemi why does 3 of my o2 sensors read mostly 750mv but I have 1 that reads 000.750 mv. Like decimal in wrong spot ask some people nobody knows, and they are brand new oem from mopar

Si

Excellent.

My Lexus 5.0 V8 (2UR-GSE) uses both Otto and Atkinson with both port and direct injection.

Jimmy neutron..?

What model picoscope do you have?

How does the sensor get cycled from low to high and high to low? Is it the ecu creating a condition of lean and rich?

best video ! thanks for the great instruction and help

atleast the test was positive

Very good!

That was very good and I thank you. Years back when GM began using HEI, I learned that disconnecting plug wires would usually blow a hole through the center of the rotor. The hole could be seen when holding the rotor up to a light source. Although the car would run, it did so quite poorly. 🖖🏻🍀

volume too high with the FX

the colliding fronts theory doesn’t make sense, Imo, I don’t know who came up with it. It’s true two fronts will cause a pressure spike but not because they collide. The secondary front basically accelerates combustion because fuel burns in two places at once. Pressure would go up like twice as fast but that itself wouldn’t be a problem. the problem is the piston may still moving up after the fuel has burned and will fight against the pressure. so it’s just equivalent to having a very advanced timing. There are cars with two spark plugs and the colliding wavefronts don’t cause any damage because of proper timing

Thanks for this description. I found it very good. I have just ordered a hybrid SUV with Atkinson cycle engine coupled with an E-CVT. . Does the VVT allow the engine to select between Otto and Atkinson cycle as required so you can maximise torque when needed. ? Thanks Rob, Melbourne Australia.

This presentation is very well done. Thank you Sir 👍🍻

Great video

This guy doesn't answer questions!

🔥 🔥 🔥

thanks for clearing up some confusion. It was bugging me but I did not know why.

thanks for filling in the blanks from all the auto videos I have watched

2005 Hyundai NF Sonata 2.0L Gasoline, 170Kmiles somehow shows very stable primary current waveforms but the peak current for all the 4 coils show steady 15A. Wonder if it is what it is or something else is going on. What would you say to 15A?

Great video. I just did a dry compression test on my 2001 Corvette Z06 and my number 7 cylinder gave me a number of 171. All other pistons are in the 195-200 range. I added 2 table spoons of oil to cylinder number 7 and that number jumped from 171 to 204. Is that without a doubt a ring problem?

What about cl fault?

Excellent explanation

You showed the trigger graph without numbers - what is the actual pulse voltage the trigger needs to send to the ignition module - does it need an AC component as shown on the graph.

How if the sensor reads between .7 to .8v. 4wire sensor. How to make the reading into .4v to .5v? And a p0420 code appears, after washing the cat it stays the read still at .7v to 8v at normal operating temperature.