Hey Master Automotive training. I contacted you guys yesterday after seeing this video and how you guys fixed that 96 jeep 4.0. I'll be bringing my 94 in for diagnosis here very shortly. Thanks again
Really loved watching this class, I like learning about engine emissions, engine efficiency, the ”five gases readings” and how the catalytic convertor copes with this . I would really like to understand better in which range of lambda factor the engine gets the best fuel economy and how the 5 gases readings look like.
SUBSCRIBED; been a mechanic for 20 years, learning new useful things here, thanks. useful trick for inspection time, that i used a few times on V12 Jags from my shop: how do you fix a car with no compression,or very low compression on one cylinder(burned exh valve,very bad rings etc) in one minute?
Thanks that was very helpful. In Australia we don't do a lot of gas analysis (hard to find someone with a modern analyser) and so far the only test I've been able to do is with an older 4 gas analyser i.e. NOx is not included. Car (2015 1.3 L Yaris) is running well CO 0% O2 0.4% CO2 16.2% HC 5 ppm Lambda 1.01 However I wish I could do the test on a more modern analyser to check the NOx levels. 🙂
Could you clear up a little bit on CO. You state that ideally you want CO to be 0%, but also state that low CO indicates a lean condition. My thought process is if its low and I have high 02 readings then it would definitely indicate a lean condition and you can't look at CO alone to pinpoint a lean condition?
Hello Jeff, thanks for watching and your comment. Ideally we want CO at 0%, you are correct with CO at 0 and a O2 of let’s say 3% yes you’d be having a true lean condition. Verifiable with a lambda calculator. With that said when we have a low amount of fuel to oxygen it will be considered lean. When I stated low CO is lean, that’s because it has less fuel and more oxygen thus meaning it’s lean. Did that make sense?
My plug & dashboard mounted ODB2 is able to shows air fuel ratio but no reading for MAF in a Honda. Able to show egr % opening. Inversely this same OBD2 shows MAF of 4.7g for 1.8 litre Mercedes M271 engine year 2006 vs MAP of 7.35psi vs 750rpm corrected for IAT of 100F but no reading for air fuel ratio or egr opening. Visually and by readings of OBD2 it appears that this 2nd car has only one 02 sensor located upstream of the cat convertor. Using 750rpm/2/60 x 1.8 x corrected air density = 5.7g/second. 4.7/5.7 = 83% of all pistons running displacement - soley by simple mathematic. Not considering suction valves close off typically at 60 degree after DBC for suction stroke. So 4.6g/second at 750rpm I would consider it acurate or at least no slight vacuum leak. During on the road the O2 sensor shows small changes of 0.6V to 0.75V in open road. Short & long fuel trims % readings looks to be in tightly held range of less than +/-2%. It will only drop to 0V on rapid stopping for traffic lights. It does drop below 0.4V when doing a non agressive braking to a stop. And it also does occasionally goes up 0.84V. When on a flat road & set auto cruise for 47mph at 2000rpm the MAF is 18g/second vs 23g/second mathematically for pistons running displacement base on air intake pressure of 13.5psi by MAP. No idea on the EGR opening. Only occasion push towards 22psi when supercharge comes on. For year 2006 cars or earlier the ECU does not interograte the O2 sensor by intermittently cutting off the fuel injectors?. At steady of 55mph it need no more than 1.9US gallon for 60 miles for this 1.6 ton car. Regarda.
I have suzuki baleno 2003 with no catalytic convertor. I do exhaust analyzer test at idle with cold engine and values are O2 = 2.93% CO2ir = 8.53% Co = 1783 ppm Nox = 64 ppm According to your lecturer that i lean its show lean condition. My cars fuel average is not good while car starting and its pickup is good. No jerks no rough idle main issue is fuel average. Please guide
Dear Friend, hello! You have 1783 ppm of HC when engine is cold. Every car makes the air/fuel mixture rich while engine is cold. Re check your car after it fully warms up and compare to whats shown in video.
Merry Christmas 🎅 🎄 🤶 Master Automobile Training My teacher ACCOMPLISHED Master Automobile Training Thanks 👍 for sharing your knowledge with us very helpful video information ACCOMPLISHED Master Automobile Training From Nick Ayivor from London England UK 🇬🇧
I love how we now at the delusion leval that a mechanic is sub par to a technician what a joke. Its just wordplay to make new young mechanics think thier better than old school mechanics. 😂 Mechanics evolve with the technology.
Hey Master Automotive training. I contacted you guys yesterday after seeing this video and how you guys fixed that 96 jeep 4.0. I'll be bringing my 94 in for diagnosis here very shortly. Thanks again
Learn a lot. Watch your video many time for better understanding
Really loved watching this class, I like learning about engine emissions, engine efficiency, the ”five gases readings” and how the catalytic convertor copes with this . I would really like to understand better in which range of lambda factor the engine gets the best fuel economy and how the 5 gases readings look like.
Great presentation! Please change your smoke alarm battery :)
Already did. 😁 thanks for watching!
Very good training 👍🏼 !
Thank you!
SUBSCRIBED; been a mechanic for 20 years, learning new useful things here, thanks.
useful trick for inspection time, that i used a few times on V12 Jags from my shop: how do you fix a car with no compression,or very low compression on one cylinder(burned exh valve,very bad rings etc) in one minute?
Thank you for watching and your support! 😁 To your question in 1 minute, 🤔 junking it? 🤣🤣
Thanks that was very helpful.
In Australia we don't do a lot of gas analysis (hard to find someone with a modern analyser) and so far the only test I've been able to do is with an older 4 gas analyser i.e. NOx is not included.
Car (2015 1.3 L Yaris) is running well
CO 0%
O2 0.4%
CO2 16.2%
HC 5 ppm
Lambda 1.01
However I wish I could do the test on a more modern analyser to check the NOx levels.
🙂
Thank you sir, great job I am learning a ton from you. Please keep it coming 👍🏾👍🏾
Hi thanks for making videos it is very help full , I have questions can check hybrid car in 5 gas
You are welcome. You can once you get the ICE started.
Very cool. Thx brother for the information
Thank you Oscar. I really enjoyed your video!
Thanks for this training.
You are very welcome and thank you for watching!
Great video!
Thanks for your support!
what is the chemical reactions from NOX and HC beside O3 under sunlight?
Do you have a class thats covers the smog inspector test thru the state
masterautomotivetraining.podia.com/california-smog-check-inspector-crash-course
Thanks for this. Which 5 gas analyzer do you use it recommend?
Could you clear up a little bit on CO. You state that ideally you want CO to be 0%, but also state that low CO indicates a lean condition. My thought process is if its low and I have high 02 readings then it would definitely indicate a lean condition and you can't look at CO alone to pinpoint a lean condition?
Hello Jeff, thanks for watching and your comment. Ideally we want CO at 0%, you are correct with CO at 0 and a O2 of let’s say 3% yes you’d be having a true lean condition. Verifiable with a lambda calculator. With that said when we have a low amount of fuel to oxygen it will be considered lean. When I stated low CO is lean, that’s because it has less fuel and more oxygen thus meaning it’s lean. Did that make sense?
Hi is there any book relative to this subject?
Is your program smog inspection 1 and 2? Is this an online program? Because some of us need to work.
how do you calibrate a sun emission machine with span gas
any tips for L1 , i have a1-8
L-1 is a hybrid of A8 and A6. Composite vehicle 4 has CAN bus, VVT and primary & secondary ignition testing.
My plug & dashboard mounted ODB2 is able to shows air fuel ratio but no reading for MAF in a Honda. Able to show egr % opening.
Inversely this same OBD2 shows MAF of 4.7g for 1.8 litre Mercedes M271 engine year 2006 vs MAP of 7.35psi vs 750rpm corrected for IAT of 100F but no reading for air fuel ratio or egr opening. Visually and by readings of OBD2 it appears that this 2nd car has only one 02 sensor located upstream of the cat convertor.
Using 750rpm/2/60 x 1.8 x corrected air density = 5.7g/second.
4.7/5.7 = 83% of all pistons running displacement - soley by simple mathematic. Not considering suction valves close off typically at 60 degree after DBC for suction stroke. So 4.6g/second at 750rpm I would consider it acurate or at least no slight vacuum leak.
During on the road the O2 sensor shows small changes of 0.6V to 0.75V in open road. Short & long fuel trims % readings looks to be in tightly held range of less than +/-2%.
It will only drop to 0V on rapid stopping for traffic lights. It does drop below 0.4V when doing a non agressive braking to a stop. And it also does occasionally goes up 0.84V.
When on a flat road & set auto cruise for 47mph at 2000rpm the MAF is 18g/second vs 23g/second mathematically for pistons running displacement base on air intake pressure of 13.5psi by MAP.
No idea on the EGR opening. Only occasion push towards 22psi when supercharge comes on.
For year 2006 cars or earlier the ECU does not interograte the O2 sensor by intermittently cutting off the fuel injectors?.
At steady of 55mph it need no more than 1.9US gallon for 60 miles for this 1.6 ton car.
Regarda.
Thank you so much
I have suzuki baleno 2003 with no catalytic convertor. I do exhaust analyzer test at idle with cold engine and values are
O2 = 2.93%
CO2ir = 8.53%
Co = 1783 ppm
Nox = 64 ppm
According to your lecturer that i lean its show lean condition.
My cars fuel average is not good while car starting and its pickup is good. No jerks no rough idle main issue is fuel average.
Please guide
Plz waiting for your answer anxiously
Plz waiting for your answer anxiously
Dear Friend, hello! You have 1783 ppm of HC when engine is cold. Every car makes the air/fuel mixture rich while engine is cold. Re check your car after it fully warms up and compare to whats shown in video.
Thanks 😊
Thanks for watching! 😁
Merry Christmas 🎅 🎄 🤶 Master Automobile Training
My teacher
ACCOMPLISHED Master Automobile Training
Thanks 👍 for sharing your knowledge with us very helpful video information
ACCOMPLISHED Master Automobile Training
From Nick Ayivor from London England UK 🇬🇧
Happy holidays!
Love your message, Ty for this info.🙏
You are very welcome, thank you for watching!
Facts though 😅work and then ☠️
H2O is two hydrogen atoms and one oxygen atom.
Yup, did I mess that up? Rest of class helped?
I love how we now at the delusion leval that a mechanic is sub par to a technician what a joke. Its just wordplay to make new young mechanics think thier better than old school mechanics. 😂 Mechanics evolve with the technology.
Ok.
beep.