How an EGR System Works Plus Testing and Inspection Procedures - PART I

I have '95 Roadmaster that is having a little trouble passing NOx. W/ the EGR off the car I can hand vacuum pump it up and it holds as well as when I place it on the car. But, when I let the car idle it wont pump up w/ the hand vacuum. Is there something going on in the intake for this odd behavior? I cleaned the EGR w/ Seafoam before. Thx

On a good running car we have exhaust gases and pcv gases and gasoline vapor going back into the intake manifold to be burned with fresh clean fuel now I see why the intake valves get caked deposits all over them and clogged up the engine intake system and requiring intake valves cleaning

So im confused on my k24 accord i cleaned the entire egr from the intake the passageway on thr side but where does the hole lead to inside the cylinder head does it just get its feed from / thru the valves into the head than the egr?

At last someone showed me where the vacuum hose from the EGR valve goes. It is missing on my car for a long time now. Very useful as usual. Thank you.

Hey man, just want to let ya know you did a VERY good job of explaining the EGR system in a way it made a LOT of sense. I'm about to take my A8 ASE test and your video cleared up a LOT of confusion!

Correct me if im wrong. When throttle plate was partially closed.. Intake vacuum will increase around 20 inch hg.

I have a 2005 grand prix gt non sc. I'm getting a p0404 code. Do you think that is probably the egr valve itself? I was going to pull it off and clean with some throttle body cleaner. Any other suggestions?

Hi dear sir ur my great master ☺🙌

Is the exhaust scavenged before it hits the cat or after it leaves the cat? THANKS!

Hey Ratchets and Wrenches. God has a plan to save your soul. He has a plan to prosper you and not to harm you. He has a plan for you to receive Jesus and turn away from all sin so He may save your soul. Even though people die, their body dies, but their souls go on to the next life. Their soul either enter Hell, the place of eternal torment, thirst, and suffering or they enter Heaven, the place of Eternal joy and peace, and glory. God wants you to choose Heaven. He wants you to choose Jesus because He cares for you.

Modern cars are garbage, unnecessarily complicated, cars with a carburetor and mechanical distributor runs just fine and can be fixed with simple and cheap parts in the road by youself, later on was a great improvement was the implementation of basic fuel injection and electronic distributor, those cars runs forever, after that they are overloaded with unnecessary valves, sensors, computers, 600 hoses under the hood GDI is good for car racing where they disassemble the engine between races but is complete garbage system in a street car, modern cars are expensive to fix, require special equipment, tools, software, etc. Garbage garbage garbage but is the way the cars market move in this days.

Ismaels General Mechanic In San Bernardino is a great mechanic. He taught me this

Can you do a video on a ford EGR (ESM)

So you are talking about what the EGR system does, not how it does it. Big difference.
You have no idea how it does it specially the electric stepper motor type.
It is easy to talk in general. Yea I can do that too.
Let me ask you straight forward direct question and I assure you, you will not answer it.
Lets see how much you actually know.
Explain in details.
1. what exactly triggers the sensor wire to send signal to the computer and exactly how that trigger works. Clearly explain it. And then what is it that you call signal? It is not some sort of whistle, or yelling, he we need some shit in here...?
2. What is reference 5 volt wire, why 5 volts? what are these things made of anyway and how do they look, their shape, size, distance, configuration …?
3. Why does so called signal wire and this reference 5 volt have their own ground wire separate from body ground anyway? Show in drawing how exactl;y these things look like and their physical relationship to what is inside the valve body.
4. How does the signal control related, designed, rand have any elationship inside the valve.
Show schematics and clearly explain what happens?
You don't have to explain how the computer does it. I won't put you through that. That would be unrealistic.

This is called "How EGR system actually works".
Now try it.

wait this egr system goes agaist everything ive learnt about cold air intake if my warm gaes are goin in whats the point of cooling the air before it goes in im confused now

Good show. Diagrams were great.

I liked all your videos. Please i need your help. What could cause rpm to go high on park and neutral? what could cause fuel rail pressure sensor in high rage? Could leak exhaust manifold causes it, cause have changed the oxygen sensors, throttle body sensor. please, help me out. My car is Kia carnival 2005 2.5L petrol engine automatic. obd codes are p1169, p0056, p0156, p0030. Thank you for your help.

Spot on.

9

so putting hot exhaust gas into the intake is supposed to cool combustion? whatever...

Not enough clear for beginners.

Are you an independent technician?

So... running "hot" exhaust gases back thru the intake "reduces" combustion temperature? BZZT! ...WRONG. The actual purpose is as you stated, it is to recycle or "reburn" a small portion of the exhaust gases for a more complete burning off of unspent fuel and/or harmful emissions... mostly during a rich condition such as during engine warm up. If anything EGR's raise combustion temps... don't believe me? go ahead an put your hand on the EGR tube running into the intake manifold :)

disliked

has anybody tried to split egr lines one going to intake and other behind airfilter so the gases going though carburator and see any milage increase difference

DPFE sensor is also known as the Delta Pressure Feedback Sensor. Hope this helps!

can you just block the egr off.

hey i have a 1998 ford escort but i have a hose from the egr that is not plug in to nothing i don,t know where it go

Hey ratchets and wrenches, I have a 2000 mustang Gt (similar to yours) .. do you know why my AC only comes out through defrost? Thanks!

I also get a random 171 map code. leak somewhere? I've checked the whole egr system except throttle body gasket and manifold gaskets.

I have 2.2 camry and can't fix egr p401. changed modulator, checked vsv, vacuum lines, egr valve, gaskets, throttle body, everything code goes off briefly sometimes but can't get rid of it. I've rested everything by the service manual and still nothing.

my 98 pathfinder has egr/ vacuum modulator/ and purge valve need help

Thank You.

I've heard claims that removing EGR can increase engine performance and improve longevity, since there is no carbon buildup on intake valves. Do you know if this is true ?

Good video

Look fw 4 part2. Tnx man!

Wow ur smart