I must say it's impressive that these complications don't seem to defeat you. 🏆 Very interesting videos! You must mention in your injector related topics that these particular injectors are low impedance, Peak and Hold type, which draw a lot of current and should never be connected constantly at 12Volts because they can be damaged. Their duty cycle doesn't usually get over 80% (Who knows, maybe someone who watches your videos won't know these details and they should). Take care!
Thanks for your comment - yes, I was surprised at the current these injectors draw. I guess when they flow test them, they must pulse the voltage. The DJetronic injectors run off 3V so putting 12v directly through could damage them. I’ll reiterate this when I put the whole kaboodle back together. Mike
@@MikesMercsandothercars I only mentioned 12V because I've seen a few videos in which people just connect them to a car battery. One of them had some smoke coming out and the fellow that made the video was surprised but not too bothered. Well... I guess it's hard to find good reliable content you can trust on the internet (as we all know 😉) Your videos are a good source though!
@@Albert.M.K Yes...`people seem to assume that because they have seen it on the web, it must be true. I am often corrected by people far more experienced than I will ever be....and I am eternally grateful to viewers who take the time to engage...and impart their wisdom. Mike
@@MikesMercsandothercars thank you Mike. I’m inspired by those channels I subscribe to. Your channel was one of the first channels I ever subscribed to.
Excellent video. Interesting science project. I was surprised by how much fuel came through in 5 seconds and how it wasn't a fine spray. Intetested in seekng what Mr. Injector does.
Yes, I was surprised at the spray pattern too. Once I get this car running, I’m hoping to hook up an oscilloscope which will demonstrate how quickly these injectors fire…..too quickly to measure with a volt meter. 5 seconds would be 5000 milliseconds and from memory the pulse width is about 3milliseconds. Mike
Thanks for your comment. What a nice car you have. I think somebody has used the engine from a 280SE to put into this 280SL. Where are you based...? Mike
@@MikesMercsandothercars Hi Mike! This engine equipped several MB. My engine was stopped for 20 years and with minor maintenance it came back to life. I'm very far from you. I am in Sao Paulo, Brazil. Good luck and I hope to see your engine running. Marco
Mike one last question was looking back in your videos to find the company that can provide the plastic shrink wrap for the injector wires for my 1973 450 SL.
Mike it seems that I rechecked the connector and there is no marking on it and it does go on to the injector either way. The only way I can think of determining the - OR + Is pull back the Boot and look at the wires one wire is brown then determine what charge the brown is then I would know what orientation the plug goes in.
Next is how it plugs into the injector i do not see any markings on the injector. But I can ask injector RX when they tested the injectors which side of the injector is + or -...any other thoughts
No haven't solved it yet I actually sent the injectors back to Injector Rx to retest at 30 psi and 3 volts they tested them originally at 42 psi and I just want them tested at the proper spec for mercedes. So when I get them back will try again. Also ordering the boots from repro parts. Question i have the same plugs you have they are crimped on the wire so the only way to seperate the wires from the plug i found that heating the old plug with my heat gun allowed me to seperate the wires so I can use the connectors. My question is will the old connectors just plug into the new one's?
Brown is earth on a Mercedes. Positive terminal on injector is towards firewall, negative is towards radiator. Assuming you watched video below: ruclips.net/video/58jAw6mBQOo/видео.html Mike
Mike does it make a difference how the electronic connectors plug into the injectors looks like they fit in either way and I don't see a positive or negative indicator on the injector or the plug?
Hi - the plastic plugs only fit one way into this style of injector and the injectors are clearly marked with a +ve and -ve alongside each terminal. When the magnetic field of the injector collapses, it creates a large voltage spike and maybe that is why it matters which way round the +ve and -ve go? Mike
I love that you took your time to do this. Good old brithsh tinkering in the shed, of the highest order. 🫡 The level of investigation and the way you went about it, is fantastic.
I must say it's impressive that these complications don't seem to defeat you. 🏆
Very interesting videos!
You must mention in your injector related topics that these particular injectors are low impedance, Peak and Hold type, which draw a lot of current and should never be connected constantly at 12Volts because they can be damaged. Their duty cycle doesn't usually get over 80% (Who knows, maybe someone who watches your videos won't know these details and they should). Take care!
Thanks for your comment - yes, I was surprised at the current these injectors draw. I guess when they flow test them, they must pulse the voltage. The DJetronic injectors run off 3V so putting 12v directly through could damage them. I’ll reiterate this when I put the whole kaboodle back together. Mike
@@MikesMercsandothercars I only mentioned 12V because I've seen a few videos in which people just connect them to a car battery. One of them had some smoke coming out and the fellow that made the video was surprised but not too bothered. Well... I guess it's hard to find good reliable content you can trust on the internet (as we all know 😉) Your videos are a good source though!
@@Albert.M.K Yes...`people seem to assume that because they have seen it on the web, it must be true. I am often corrected by people far more experienced than I will ever be....and I am eternally grateful to viewers who take the time to engage...and impart their wisdom. Mike
Really interesting to see how the injectors have aged differently in the car. Always something to learn from you. Thanks Mike :)
Yes…you never know with injectors till you take them out and test them. Getting ever closer to getting this old girl running again. Mike
You are a fine experimental scientist! Very gifted.
Love your injector flow bench Mike!
….looks almost professional! How is your project going- you’ve done a great job and your channel is rapidly becoming the go to for 560sl owners. Mike
@@MikesMercsandothercars thank you Mike. I’m inspired by those channels I subscribe to. Your channel was one of the first channels I ever subscribed to.
@@TonyLiveTV I am honoured! Mike in France
Excellent video. Interesting science project. I was surprised by how much fuel came through in 5 seconds and how it wasn't a fine spray. Intetested in seekng what Mr. Injector does.
Yes, I was surprised at the spray pattern too. Once I get this car running, I’m hoping to hook up an oscilloscope which will demonstrate how quickly these injectors fire…..too quickly to measure with a volt meter. 5 seconds would be 5000 milliseconds and from memory the pulse width is about 3milliseconds. Mike
Thanks for the class! I will use this knowledge to maintain my MB 1975 280SE.
Thanks for your comment. What a nice car you have. I think somebody has used the engine from a 280SE to put into this 280SL. Where are you based...? Mike
@@MikesMercsandothercars Hi Mike! This engine equipped several MB. My engine was stopped for 20 years and with minor maintenance it came back to life. I'm very far from you. I am in Sao Paulo, Brazil. Good luck and I hope to see your engine running. Marco
@@marcosortolani3639 Thanks - if your engine started after 20 years, maybe there is hope for this engine! Mike in England.
@@MikesMercsandothercarsIt will run!
Thanks for your help you are really a master
Always happy to share what little knowledge I have. Did you get the issue sorted? Mike
Mike one last question was looking back in your videos to find the company that can provide the plastic shrink wrap for the injector wires for my 1973 450 SL.
Mike it seems that I rechecked the connector and there is no marking on it and it does go on to the injector either way. The only way I can think of determining the - OR + Is pull back the Boot and look at the wires one wire is brown then determine what charge the brown is then I would know what orientation the plug goes in.
Next is how it plugs into the injector i do not see any markings on the injector. But I can ask injector RX when they tested the injectors which side of the injector is + or -...any other thoughts
No haven't solved it yet I actually sent the injectors back to Injector Rx to retest at 30 psi and 3 volts they tested them originally at 42 psi and I just want them tested at the proper spec for mercedes. So when I get them back will try again. Also ordering the boots from repro parts. Question i have the same plugs you have they are crimped on the wire so the only way to seperate the wires from the plug i found that heating the old plug with my heat gun allowed me to seperate the wires so I can use the connectors. My question is will the old connectors just plug into the new one's?
Yes - the old metal crimp plugs will just clip into the new plastic plugs. Mike
Mike your plugs look to be the same thing I have what is the brown wire charge is it positive? Then looking at the injector what side is positive?
Brown is earth on a Mercedes. Positive terminal on injector is towards firewall, negative is towards radiator. Assuming you watched video below:
ruclips.net/video/58jAw6mBQOo/видео.html
Mike
Mike does it make a difference how the electronic connectors plug into the injectors looks like they fit in either way and I don't see a positive or negative indicator on the injector or the plug?
Hi - the plastic plugs only fit one way into this style of injector and the injectors are clearly marked with a +ve and -ve alongside each terminal. When the magnetic field of the injector collapses, it creates a large voltage spike and maybe that is why it matters which way round the +ve and -ve go? Mike
I love that you took your time to do this. Good old brithsh tinkering in the shed, of the highest order. 🫡
The level of investigation and the way you went about it, is fantastic.
Yes…it is good to find out how things actually work a relief to know that there are still people out there interested in these things! Mike