Before You Load The Parts Cannon.
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Date: 2024-08-19
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Comments and reviews: 20
70sAirForceBrat
When you did your diagnostics it's nice to have oscilloscope built into your scanner but most of us at home garage mechanics don't have that option. You should have showed the analog way to check using a ohmmeter in your test light showing the voltage drop from the sensor ground to the battery ground or even the ohm check but sometimes that's only 50% effective if the grounds only failing under a load. So using a 2 to 4 amp load with the ohmmeter to show voltage across sensor ground to battery ground. You shown this in other videos which is extremely helpful to the backyard mechanic using basic tools to figure it out. And you should put a link to your pocket oscilloscope. That one would have been nicer on my pocketbook back in the day when I was tuning amplifiers not the clip. Clipping on a amplifier means distortion & distortion means blown up woofers.
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When you did your diagnostics it's nice to have oscilloscope built into your scanner but most of us at home garage mechanics don't have that option. You should have showed the analog way to check using a ohmmeter in your test light showing the voltage drop from the sensor ground to the battery ground or even the ohm check but sometimes that's only 50% effective if the grounds only failing under a load. So using a 2 to 4 amp load with the ohmmeter to show voltage across sensor ground to battery ground. You shown this in other videos which is extremely helpful to the backyard mechanic using basic tools to figure it out. And you should put a link to your pocket oscilloscope. That one would have been nicer on my pocketbook back in the day when I was tuning amplifiers not the clip. Clipping on a amplifier means distortion & distortion means blown up woofers.
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Esteb86
I work in telecom, and basically all of the new techs, and many of the older techs have no idea how to shoot copper trouble. It's amazing how many of them are just equipment swappers. I recently joined a peer-to-peer training group at work and have found out that they were never trained properly, or at all. We've had some of the company trainers come in to lead, while we were putting our labs together, and most of them don't know a single thing. They just read the curriculum, then tangent off onto some random stuff. One trainer came in and essentially just talked himself up the entire time. Even the students noticed he didn't know anything. Needless to say, he won't be coming back to our yard. All this to say, I want to be the kind of teacher you are, Mr. O. You say you're no professional, and not a good teacher. However, you are much more.
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I work in telecom, and basically all of the new techs, and many of the older techs have no idea how to shoot copper trouble. It's amazing how many of them are just equipment swappers. I recently joined a peer-to-peer training group at work and have found out that they were never trained properly, or at all. We've had some of the company trainers come in to lead, while we were putting our labs together, and most of them don't know a single thing. They just read the curriculum, then tangent off onto some random stuff. One trainer came in and essentially just talked himself up the entire time. Even the students noticed he didn't know anything. Needless to say, he won't be coming back to our yard. All this to say, I want to be the kind of teacher you are, Mr. O. You say you're no professional, and not a good teacher. However, you are much more.
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autorepair
Thanks for your videos, there's not a lot of honest repair shops and dealerships. You really make the dishonest repair shops and dealerships look as bad as they really are, if only more people would watch your videos there would be a lot more honest technicians.
P. s. I particularly liked the video about the suv that was taken to the dealership and the owner was told they needed a complete wiring harness to the tune of $9000. You traced the problem down to a faulty repair of a wire going to the left tail light. I think a lot of problems with technicians is they are taught to rely on only the the car scanner for diagnostic results and when that doesn't work they just assume the car always needs several new parts to solve the problem when in reality you still have to check voltage, ground and other things such as a visual inspections!
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Thanks for your videos, there's not a lot of honest repair shops and dealerships. You really make the dishonest repair shops and dealerships look as bad as they really are, if only more people would watch your videos there would be a lot more honest technicians.
P. s. I particularly liked the video about the suv that was taken to the dealership and the owner was told they needed a complete wiring harness to the tune of $9000. You traced the problem down to a faulty repair of a wire going to the left tail light. I think a lot of problems with technicians is they are taught to rely on only the the car scanner for diagnostic results and when that doesn't work they just assume the car always needs several new parts to solve the problem when in reality you still have to check voltage, ground and other things such as a visual inspections!
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gregl4244
This is why the average guy gets screwed all the time. Doing it myself i would have changed the sensor. There is no shop near me who would acrually be capable of finding the actual problem.
Recently i had a 2002 jeep grand cherokee that was having some abrupt power delivery problems. I threw a fuel pump in because thats about the level of my skills. Didnt help so i took it to my shop. They replaced crank shaft sensor and it didnt help. I took it to another shop that replaced coils, plugs and another sensor. That didnt fix it either. So after about a $1000 i had to scrap it because nobody could figure it out.
If you dont have a real mechanic nearby you are SOL. Of course i never found out what the problem was but i think a 2002 jeep is probably not the most complicated vehicle to diagnose.
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This is why the average guy gets screwed all the time. Doing it myself i would have changed the sensor. There is no shop near me who would acrually be capable of finding the actual problem.
Recently i had a 2002 jeep grand cherokee that was having some abrupt power delivery problems. I threw a fuel pump in because thats about the level of my skills. Didnt help so i took it to my shop. They replaced crank shaft sensor and it didnt help. I took it to another shop that replaced coils, plugs and another sensor. That didnt fix it either. So after about a $1000 i had to scrap it because nobody could figure it out.
If you dont have a real mechanic nearby you are SOL. Of course i never found out what the problem was but i think a 2002 jeep is probably not the most complicated vehicle to diagnose.
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Chris-bn1bn
Well done, although as you say, if I didn't have some technical knowledge. I wouldn't have been able to follow your chain of thought. Who decided to change the way solder is pronounced I know it makes sense, but it could be someone's name, it which pronunciation is up to the person who uses the name & not some Oxford dictionary geek. Do you get my drift I can't stand when they change pronunciations, or entire words, like when we used to say spooked(as in fish. What the hell has spooky have anything to do with fish I know it as sodder. Yes, I know it's not spelled that way. That's the way I was taught about 50 yrs ago, and since. How about you
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Well done, although as you say, if I didn't have some technical knowledge. I wouldn't have been able to follow your chain of thought. Who decided to change the way solder is pronounced I know it makes sense, but it could be someone's name, it which pronunciation is up to the person who uses the name & not some Oxford dictionary geek. Do you get my drift I can't stand when they change pronunciations, or entire words, like when we used to say spooked(as in fish. What the hell has spooky have anything to do with fish I know it as sodder. Yes, I know it's not spelled that way. That's the way I was taught about 50 yrs ago, and since. How about you
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cmpolvado4409
Aloha, I work in Marine electronics aboard warships. When performing a mechanical bond for grounds, etc. , we always add molybdenum grease/paste between the bonding surfaces to enhance corrosion protection and to ensure best mechanical bonding connections to less than. 1 ohm between the bonded metals. This is especially helpful between dissimilar metal surfaces. Due to the east coast vehicle corrosion issues, I assume this would be a good practice when dealing with your automotive mechanical bonding problems. If it works well on the ocean then it should be good for the salted roads/environment in your field of work.
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Aloha, I work in Marine electronics aboard warships. When performing a mechanical bond for grounds, etc. , we always add molybdenum grease/paste between the bonding surfaces to enhance corrosion protection and to ensure best mechanical bonding connections to less than. 1 ohm between the bonded metals. This is especially helpful between dissimilar metal surfaces. Due to the east coast vehicle corrosion issues, I assume this would be a good practice when dealing with your automotive mechanical bonding problems. If it works well on the ocean then it should be good for the salted roads/environment in your field of work.
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rhkips
G112 was bad What does it think it is, G102 What a jerk! LOL
I'm one of those weirdos that verifies sensor ground with a test light, then uses it as a scope ground. I honestly don't know why I do this, I'm not sure if it's ever directly benefited me, but I feel like someday, it will be the critical step that makes something apparent!
Although, I once did have a BMW that I could not find a functional body ground on, and ended up using a sensor ground as a test light ground to check a funky fusebox problem.
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G112 was bad What does it think it is, G102 What a jerk! LOL
I'm one of those weirdos that verifies sensor ground with a test light, then uses it as a scope ground. I honestly don't know why I do this, I'm not sure if it's ever directly benefited me, but I feel like someday, it will be the critical step that makes something apparent!
Although, I once did have a BMW that I could not find a functional body ground on, and ended up using a sensor ground as a test light ground to check a funky fusebox problem.
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user-gv6hq6se3w
I want to thank you Eric for sharing your knowledge with us back yard DIY's. The electric steps on my RV quit working and after thinking I was going to have to spend 300. 00 dollars on new parts I climbed under the rig and started fishing and found a ground wire with the green crusty puss. Cut the eyelet off and got to clean wire and made the repair like you showed us. Worked great and no money involved except for the new eyelet and heat shrink. Thanks again Eric!
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I want to thank you Eric for sharing your knowledge with us back yard DIY's. The electric steps on my RV quit working and after thinking I was going to have to spend 300. 00 dollars on new parts I climbed under the rig and started fishing and found a ground wire with the green crusty puss. Cut the eyelet off and got to clean wire and made the repair like you showed us. Worked great and no money involved except for the new eyelet and heat shrink. Thanks again Eric!
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codycopithorne6294
Ah yes. Check ground and fluid film after is a motto i've adopted from Eric. A bad ground (rust) was causing my horn relay to blow every couple of months. At first I casually asked some local mechanics what they thought and got blank stares. Then I started tracing wires to find the ground. All I could do at that point was clean and fluid film the grounds for the horn and eliminate that out. Haven't had to change a relay since and that was 8 months ago!
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Ah yes. Check ground and fluid film after is a motto i've adopted from Eric. A bad ground (rust) was causing my horn relay to blow every couple of months. At first I casually asked some local mechanics what they thought and got blank stares. Then I started tracing wires to find the ground. All I could do at that point was clean and fluid film the grounds for the horn and eliminate that out. Haven't had to change a relay since and that was 8 months ago!
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bigcaputo09
What you're saying is always check your sensor ground and power at the actual plug. If it's off you go to the battery and ground to figure out if the wiring is bad or not! Didn't ever just use the battery ground to test for power at a plug or battery power to test for ground at the plug! That also applies to ohm testing. It could look good but not be able to carry the current! Ohm readings aren't the end of trouble shooting a bad wire or connection!
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What you're saying is always check your sensor ground and power at the actual plug. If it's off you go to the battery and ground to figure out if the wiring is bad or not! Didn't ever just use the battery ground to test for power at a plug or battery power to test for ground at the plug! That also applies to ohm testing. It could look good but not be able to carry the current! Ohm readings aren't the end of trouble shooting a bad wire or connection!
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c0mputer
Serious question: Eric when you say in the beginning that this one would burn you or you wouldn’t want to eat a MAS from the dealer, no shop I have ever been to has replaced a part which didn’t fix the problem, then eats that cost. They ALWAYS simply charge you. They can throw any part they want at it and they don’t eat anything. Is this not normal What if the shop says oh that thermostat was part of the problem and needed to be replaced
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Serious question: Eric when you say in the beginning that this one would burn you or you wouldn’t want to eat a MAS from the dealer, no shop I have ever been to has replaced a part which didn’t fix the problem, then eats that cost. They ALWAYS simply charge you. They can throw any part they want at it and they don’t eat anything. Is this not normal What if the shop says oh that thermostat was part of the problem and needed to be replaced
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rockoyouthman
I love the wisdom and I understand now that you’ve taught it but how’s a guy like me to know what kind of wave form I’m suppose to see from something like a MAF sensor or any other sensor for that matter I get that most of you get it from experience, but as a do it yourselfer willing to buy the right tools, I always find what I’m missing is reference knowledge! Wish there was some book that gave specs for stuff like this
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I love the wisdom and I understand now that you’ve taught it but how’s a guy like me to know what kind of wave form I’m suppose to see from something like a MAF sensor or any other sensor for that matter I get that most of you get it from experience, but as a do it yourselfer willing to buy the right tools, I always find what I’m missing is reference knowledge! Wish there was some book that gave specs for stuff like this
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s. j. 5850
Test don't guess, unless it's your own car & the parts cannon doesn't go over a certain amount. Considering you own your own shop & that MAF sensor is a few hundred dollars, test the heck out of it! You're 100% right about testing the power, ground, & signal wires properly. Testing that ground with a multimeter would have revealed voltage drop on the ground side from battery negative to the ground side of the sensor.
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Test don't guess, unless it's your own car & the parts cannon doesn't go over a certain amount. Considering you own your own shop & that MAF sensor is a few hundred dollars, test the heck out of it! You're 100% right about testing the power, ground, & signal wires properly. Testing that ground with a multimeter would have revealed voltage drop on the ground side from battery negative to the ground side of the sensor.
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jeremyb4493
I may be one of the more fortunate ones but the 3. 9vvt engine in my 08 Uplander has been bulletproof. Had to fix the unfortunately standard rear head gasket and oil pan seal and coolant crossover gaskets years ago but it now has 276, 000 miles on it, never runs hot, doesn't smoke and still has decent punchy power. But it's my work vehicle so it doesn't have to do much more than run well lol
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I may be one of the more fortunate ones but the 3. 9vvt engine in my 08 Uplander has been bulletproof. Had to fix the unfortunately standard rear head gasket and oil pan seal and coolant crossover gaskets years ago but it now has 276, 000 miles on it, never runs hot, doesn't smoke and still has decent punchy power. But it's my work vehicle so it doesn't have to do much more than run well lol
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autorepair
I'm an electronics hobbyist. I fix stuff, including my own vehicles. My Dad did national service in the Royal Corps of Signals, as a radio repairer. His advice to me, on fault finding was, 'always check your power supplies first'. It has stood me in good stead many times. 'Power and grounds' baby. (BTW. Thanks for the 'solder' pronounciation. Instead of 'sodder'. LOL)
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I'm an electronics hobbyist. I fix stuff, including my own vehicles. My Dad did national service in the Royal Corps of Signals, as a radio repairer. His advice to me, on fault finding was, 'always check your power supplies first'. It has stood me in good stead many times. 'Power and grounds' baby. (BTW. Thanks for the 'solder' pronounciation. Instead of 'sodder'. LOL)
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Ro32da72
It's easy to focus on the component at the end of the wire, and forget that the information that comes from a sensor is only as reliable as the wiring and connectors. And if ground is your reference, make sure that reference is good before relying on it to take measurements.
This is quality electrickery content Eric, thank you. And you ARE a great teacher
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It's easy to focus on the component at the end of the wire, and forget that the information that comes from a sensor is only as reliable as the wiring and connectors. And if ground is your reference, make sure that reference is good before relying on it to take measurements.
This is quality electrickery content Eric, thank you. And you ARE a great teacher
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michaelskinner896
My life doesn't require me to have your kind of knowledge of auto repair, but there is a little part of me that wishes I had at least half of your skills. I really enjoy watching your process and seeing how you solve a potentially complex problem. Processes that could be applied to many parts of life, really. Thanks for sharing!
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My life doesn't require me to have your kind of knowledge of auto repair, but there is a little part of me that wishes I had at least half of your skills. I really enjoy watching your process and seeing how you solve a potentially complex problem. Processes that could be applied to many parts of life, really. Thanks for sharing!
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philjerome9795
Coincidence, I just changed a MAF sensor on a friend's 2000 Park Ave. The car would occasionally buck and throw a MAF code. I bought what I thought was an OEM part on Rock Auto (Delphi. Turns out it was made in the good old PRC. So far, the problem and code haven't come back. I guess that I'm guilty of being a parts cannoneer.
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Coincidence, I just changed a MAF sensor on a friend's 2000 Park Ave. The car would occasionally buck and throw a MAF code. I bought what I thought was an OEM part on Rock Auto (Delphi. Turns out it was made in the good old PRC. So far, the problem and code haven't come back. I guess that I'm guilty of being a parts cannoneer.
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geoffschuh5606
Not the best teacher my foot. Good teaching starts with intimate knowledge of the subject, passion for the subject and, lastly, good communication. You do not have to be slick and polished; just get the point across. You are far better than many I have seen, and I have seen a lot, not just here on you tube. Well Done.
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Not the best teacher my foot. Good teaching starts with intimate knowledge of the subject, passion for the subject and, lastly, good communication. You do not have to be slick and polished; just get the point across. You are far better than many I have seen, and I have seen a lot, not just here on you tube. Well Done.
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JimmyMakingitwork
Great video, I always advise using battery connections while testing sensors, since just this kind of thing can happen otherwise. With the battery in the trunk the alternator has a good power and ground to use for testing. if the engine ground is good. But if it wasn't there might be quite a few more problems. ;)
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Great video, I always advise using battery connections while testing sensors, since just this kind of thing can happen otherwise. With the battery in the trunk the alternator has a good power and ground to use for testing. if the engine ground is good. But if it wasn't there might be quite a few more problems. ;)
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