Emissions Day One

[@benjaminrich9396]

great channel. I teach motor vehicle in colleges and you have a great approach. I like how you riddle your theory with examples and anecdotes. thanks for sharing. Ben

[@johnmckamy6398]

I wonder if your students know just how lucky they are to have a teacher like you , there aren't many left around that know the older stuff to the newest around any more . I have been working on cars for over 25 years some professional some hobby and still every time I watch your video's I learn something new . thank you for all your skills and teaching .

[@NewLevelAuto]

Terrific job. The experience shows. Haven't listened in on a decent emissions class in 20 years. Yours was much more than decent

[@johnmckamy6398]

this man is great , I've been watching him for a while now.

[@robinsonsauto]

I second this! Terrific Job

[@Kona5.0]

Great video - as always. I always appreciate and watch every single one. The amount of knowledge im absorbing is outstanding! also, that fancy name for water your trying to think of: Dihydrogen monoxide

[@garymijangos9403]

Awesome video thank you 🙏

[@DaN3xtSlimShady]

“Timothy, pay attention”😂😂

[@robinsonsauto]

Very Good! you kept my attention and interest throughout this entire presentation!!

[@McCuistian]

Thanks!

[@robinsonsauto]

@@McCuistian your welcome, been going through some of you’re videos! Lots of great information. I’m getting ready to go for my PA emissions certification. Any tips video references that you recommend? Been a few years lol I’m refreshing

[@McCuistian]

@@robinsonsauto This KZbin channel is geared toward exactly that... Quite a few guys tell me that they got their ASE certs by watching this channel.

[@JoseGonzalez-ut8gc]

dammit Timothy pay attention

[@cipriansofineti346]

Saw the animation, the injector jets before the intake valves are opening? Aren't they injecting during the intake stroke?

[@McCuistian]

Nope - they're injected right before the intake valve opens on Port Fuel injection - GDI is different though... injects right into the cylinder with very high pressure.

[@cipriansofineti346]

@@McCuistian Thank you for answering! OMG, all this time I always thought that the port injectors spray while the intake valve starts to open, though always wondering how is dealt the variable injection time in regard with fixed valve opening time. Now its clear, so the mixture is created inside the intake duct and it waits for the valve to open to be sucked inside the cylinder? I always thought the mixture is created while the air travels by the valve while the injector sprays on !

[@McCuistian]

@@cipriansofineti346 it's only there very briefly before being swept into the cylinder as the intake valve is opened... 😁

[@cipriansofineti346]

@@McCuistian I assume the injectiction commences during the second half of exhaust stroke or so ?

[@McCuistian]

@@cipriansofineti346 The cam sensor on port injection units I've worked with and tested makes its switch at 24 degrees after top dead center on the power stroke to make sure all the fire has gone out in the cylinder. The window for injection takes place after that.

[@davidwaters9890]

I have a dodge Dakota 87 that didn't pass smog? What should I do? To make it pass?

[@McCuistian]

What did the report say?

[@timd4925]

spark plugs in a diesel for explorer? what?

[@McCuistian]

An Explorer was "dieseling" meaning it kept running with the key switched off. It wasn't a diesel.