Is this true, or just a bunch of bunk??

They can't put anything on the Internet that is not true......right ??

As you suspected, it is a LARGE pile.

 

There is no way the ECM can "learn" new spark plugs or coils.
However, the ECM monitors and senses the output power of each cylinder and will adjust fuel injection to even out differences. The engine will run smoother.
But this is an always ongoing process. Resetting will not do any good.
Greets,
Paul

 

However, the ECM monitors and senses the output power of each cylinder

Really ??
How does it do that, exactly ??

 

You can find all that info on the Hyundai service site on the engine management system.
As I said, each fuel injection is timed and calculated amount by several parameters, like MAF info, power request (throttle), cam and cranckshaft sensors and some other environmental parameters. When a cylinder produces too much power in relation to the other cylinder values, the interval timing at the cam and cranckshaft sensors will vary (a bit harder push so earlier pulse arrival) and the ECM will adjust injection quantity to even out these differences, so reducing or enhancing power output. This will smooth out these differences.
This is done at each stroke of every cylinder at each revolution of the engine. All ofcourse within some upper and lower limits.
This is a nice feature, however one drawback will be when f.i. an injector starts to fail, all other injectors also will be lowered in function, so engine power decreases more as would be expected from one injector.
Greets,
Paul

 

When a cylinder produces too much power in relation to the other cylinder values,

My question is: HOW is that determined, exactly ??
What senses it ??

 

Won't hurt to reset the ecu.

 

This is nonsense, just fit new plugs properly and drive. Chris

 

Actually, it's not nonsense. But since you're supposed to disconnect the battery anytime you monkey with wires, the point is rather moot anyways.

 

You can reset your ECU if you like, but learning spark settings is nonsense. The ECU does not learn plugs. It will detect a misfire so changing them is important.
You do not need to disconnect the battery to change plugs.

With modern cars you should not disconnect the battery untill all ecu's have had time to shut down. Opening a door will wake the system up.

Also you would need to re set radio codes and clocks if they are not saved automatically.

Cars with stop/start and 24/7 battery monitoring need to be reprogrammed to the battery if you disconnect it, so ensure you have access to the appropriate equipment in these cases.
AGM batteries are used here and no starter motor is fitted. The alternator is also a 3 phase drive and start motor.

Not sure if hyundai have this yet, but they will.

These alternators only charge on overrun at a high voltage 27 volts, and they charge capacitors not the battery directly.
Short the capacitors out and it will be the last thing you ever do, so care and understanding is required.
The future is complicated, Chris

 

The future is complicated, Chris

The future has been deferred !!

Back in the late '90s the motor industry on both sides of the Atlantic had a grand plan to change all new models of cars to 42V nominal to reduce current load in the wiring loom, reduce weight of wiring and reduce cost of copper - nearly two decades later we're still waiting.

 

10yr of working in Hyundai dealer service dept.... I have to come here to "hear it all"...

There IS NO resetting a PCM for installation of new spark plugs.. PCM does not monitor "power output" to trim the fuel.. that is done via exhaust product content coming out of cylinder via exhaust port and blown across OX sensor tip, where OX sensor sends voltage signal back to PCM based on exhaust content and speed/air flow through MAP or manifold pressure via MAP, throttle angle, and trims fuel injector pulse time to maintain proper combustion mixture (fuel trim)..

I monkey with SRS all the time, been 22yr now, I dont disconnect battery when monkey with SRS, let alone anything else with the car.

 

There IS NO resetting a PCM for installation of new spark plugs..

And there you have it my friends.

The same answer from one trained and experienced mechanic and several others of us who think we know what we are talking about.

If that's not good enough for you, then maybe you didn't really want to hear an answer in the first place.

 

They have reduced the copper you would need to have all you have in cars today, it's called CAN Bus.
Your cars would be well over weight without it.
The future is here and it is changing fast........
We already have remote throttle, steer by wire and brake by wire is coming. Think FLEX RAY, the data protocol used.
Be afraid lol..... Chris

 

I think the amount of copper has increased! See all the harness of all the sensors, the electric windows, door locks, interiour lighting, 12v outlets etc. etc.
In my first car there were 5 fuses for electrics and a few relays for switching lights etc.
How many in the Santa? 50, 60 fuses? And 15, 20 relays?
The CAN bus still only applies to the ECU and a few internal controllers. We are still well off of communications via some bus to all the electric devices in the car. However, like seen in an Airbus airplane all can be done with computers and controlled by wire.
But in an Airbus the amount of copper wires are many many kilometers and weighing a lot. So for economics on the amount of copper in the car you should not do that.
But I would be afraid, of pricing. Cars would very much go up in price and I don't see a lot of car buyers waiting for that.

Greets,
paul