Thank you for this information. Why is the small bypass tube at the Idle Control Valve (ICV) blocked off on one end for the 420 SEL but not on the 560 SEL? Also, the part numbers are different for each: 420 SEL (116-997-16-52), 560 SEL (000-987-26-27). A photo of the 420 SEL bypass tube with one end sealed can be seen at the pelicanparts website if you search for the part number: 116-997-16-52-MBZ.
Hi grundgedude2, The picture is for the 3.8 & 5 L engines This is number 405 in the parts explosion drawing 07 070 00008 and is not applicable to your 4.2 L engine If have the correct tube in 42mm length available for $ 3.00 each via first class letter included Cashapp $peapvp with ur name address in FOR field Note: Any vehicle regardless of MO has the following part replacement number 000 987 26 27 Whenever a pvc tube 6mm x 1mm x length is needed The above part number is this tube in 1100 mm length (1.1 meter / 3.3 feet) The old parts manuals were never completely updated Hope that helps
@@inovahightechltd My 1990 420 SEL has the tube in it that is blocked on one end (116-997-16-52). My parts diagram shows that number 405 fits my 420SEL for my VIN number. That's where I got the part number from. I do not need a new tube, as I have the bulk tubing for my 560. I was just wondering what is the technical reason that the 420 SEL engine needs a blocked off tube but my 560 SEL does not? Does the bigger 560 engine require more air at idle than the smaller 420 engine so it will idle smoother?
@@grungedude2 the only thing I can think off that this has something to do with KAT, RÜF and no KAT or Unregulated KAT. Do you have the right angled ICV to boot connector with two openings on each side for those tubes like the 3.8 / 5.0 or is it the same one like the 5.6L
@@inovahightechltd Thanks for your replies. No, the connectors are not like the 3.8/5.0. Both the 420 and 560 use the same exact rubber tubes on the ICV and have the exact same part numbers, just like your 560. The only difference is the small plastic tube, the 420 has one end closed, unlike the 560 which is open on both ends. I have always wondered what the technical reason was for this and thought that since the 420 is a smaller engine it needed less air at idle; therefore, they blocked off that plastic bypass tube.
@grungedude2, this means you are inserting the closed tube in both rubber tubes on the ISCV, which means your bypass is closed off permanently. This reduces the actual vacuum by which the sensor plate is pulled and would reduce the fuel flow. Yes, that means the ISCV has now complete control of the idle speed and the overall vacuum on the sensor plate on idle is lower when compared to the 5.6L or the 4.2L non Kat / RÜF since I assume your 420 is a US Kat version
Hi...I got a W126 380SE. huge prblm with the sensor plate setting. That play is extremely difficult to "feel" I have tried every conceivable setting ala utube experts. The co2 adjustment screw...how much adjustment do I need to turn....either way, to know the default position so that I can at least get her to start? I have adjusted her so that fuel just start flowing. Turned back 1/4 turn....no luck. She ran ok until I messed with the CO2...SIX MONTHES LATER a odd cough(some times)..ARGHHHH!
@@inovahightechltd came of a running car. When I fitted it she ran fairly ok. Smelled a bit rich and than I fiddled with the CO2. Now nothing. Occasionally she will give cough but refuse yo start. I need to set it at default that I did accordingly but still no luck. Got fuel pressure, got spark...got everything.
@@gregmenego2200 to set the default position you need to take out the fuel pump relay and jumper two terminals (I don’t know which for 3.8) so you have a constant fuel pressure in fuel distributor. At this point the set screw is adjusted so the plate has a free travel of app 1mm to 1.5mm between the final resting point and the point the arm starts to push the piston of the fuel distributor. This adjustment can only be done with a running fuel pump
Ok....tried it. I ended up turning the CO 2 screw all the way out but dont get any play. When I push the sensor plate down immediate pressure persist with the pumps running. O boy....what to do now.
Hi Peter. So I made the mistake of turning the CO screw all the way clockwise. I was trying to find where it stops . After doing this I think something came undone. What would recommend that I do? Get a new air flow meter?
@georgesand4629 you run the fuel pumps by jumping 7 + 8 on FPR socket Then you adjust the set screw that you hear the fuel injectors squealing when you depress the plate by about 1/16 of an inch. When you release the plate then squealing needs to stop
My 230E K-jetronic plate has no freeplay but the car starts first time cold or hot. After 30 minutes of driving it misfires badly when accelerating. Ive replaced a lot of parts, cleaned the fuel system and had garages check pump and fuel pressures. Ive run out of ideas.
Hi George, Working as consultant for MB, Bosch and SEL before I came to America and some of it can be found in older printed Bosch Technical Notes in German. The page I showed is from the service manual released in 1990 which I obtained from MB in Stuttgart directly through my connections. This is group 07.3 Chapter 245 and can be found in the Service Manual for Engine 116 and 117 release 1990. Hope that helps Peter
Hello mister :) You mention someone in the UK,that had a "500e" with " issues"..regarding this. So here is the Fun fact.There are no 500e"s with KE jetronic. They all have LH electronic injection. So most likely the car you are talking about is a 1991 or 1992 500SL...They had still the KE jetronic :) I have been bingewatching your videos..cause i am on my way to get a 560 Sec...so i am preparing myself to re learn KE stuff etc :) I have had a 190e 2.5 16 before..and dealt alot with KE jetronic..but i need to refresh my knowledge..and i really enjoy your channel. You are welcome to check out my channel also. I havent uploaded a Mercedes video in a long time..but hopefully i will start uploading more videos soon. :) Greetings from Norway ,Stefan :)
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Thank you for this information. Why is the small bypass tube at the Idle Control Valve (ICV) blocked off on one end for the 420 SEL but not on the 560 SEL? Also, the part numbers are different for each: 420 SEL (116-997-16-52), 560 SEL (000-987-26-27). A photo of the 420 SEL bypass tube with one end sealed can be seen at the pelicanparts website if you search for the part number: 116-997-16-52-MBZ.
Hi grundgedude2,
The picture is for the 3.8 & 5 L engines
This is number 405 in the parts explosion drawing 07 070 00008 and is not applicable to your 4.2 L engine
If have the correct tube in 42mm length available for $ 3.00 each via first class letter included
Cashapp $peapvp with ur name address in FOR field
Note:
Any vehicle regardless of MO has the following part replacement number
000 987 26 27
Whenever a pvc tube 6mm x 1mm x length is needed
The above part number is this tube in 1100 mm length (1.1 meter / 3.3 feet)
The old parts manuals were never completely updated
Hope that helps
@@inovahightechltd My 1990 420 SEL has the tube in it that is blocked on one end (116-997-16-52). My parts diagram shows that number 405 fits my 420SEL for my VIN number. That's where I got the part number from. I do not need a new tube, as I have the bulk tubing for my 560. I was just wondering what is the technical reason that the 420 SEL engine needs a blocked off tube but my 560 SEL does not? Does the bigger 560 engine require more air at idle than the smaller 420 engine so it will idle smoother?
@@grungedude2 the only thing I can think off that this has something to do with KAT, RÜF and no KAT or Unregulated KAT.
Do you have the right angled ICV to boot connector with two openings on each side for those tubes like the 3.8 / 5.0 or is it the same one like the 5.6L
@@inovahightechltd Thanks for your replies. No, the connectors are not like the 3.8/5.0. Both the 420 and 560 use the same exact rubber tubes on the ICV and have the exact same part numbers, just like your 560. The only difference is the small plastic tube, the 420 has one end closed, unlike the 560 which is open on both ends. I have always wondered what the technical reason was for this and thought that since the 420 is a smaller engine it needed less air at idle; therefore, they blocked off that plastic bypass tube.
@grungedude2, this means you are inserting the closed tube in both rubber tubes on the ISCV, which means your bypass is closed off permanently.
This reduces the actual vacuum by which the sensor plate is pulled and would reduce the fuel flow.
Yes, that means the ISCV has now complete control of the idle speed and the overall vacuum on the sensor plate on idle is lower when compared to the 5.6L or the 4.2L non Kat / RÜF since I assume your 420 is a US Kat version
Hi...I got a W126 380SE. huge prblm with the sensor plate setting. That play is extremely difficult to "feel"
I have tried every conceivable setting ala utube experts. The co2 adjustment screw...how much adjustment do I need to turn....either way, to know the default position so that I can at least get her to start? I have adjusted her so that fuel just start flowing. Turned back 1/4 turn....no luck.
She ran ok until I messed with the CO2...SIX MONTHES LATER a odd cough(some times)..ARGHHHH!
When was your fuel distributor rebuilt?
@@inovahightechltd came of a running car. When I fitted it she ran fairly ok. Smelled a bit rich and than I fiddled with the CO2.
Now nothing. Occasionally she will give cough but refuse yo start. I need to set it at default that I did accordingly but still no luck. Got fuel pressure, got spark...got everything.
@@gregmenego2200 to set the default position you need to take out the fuel pump relay and jumper two terminals (I don’t know which for 3.8) so you have a constant fuel pressure in fuel distributor. At this point the set screw is adjusted so the plate has a free travel of app 1mm to 1.5mm between the final resting point and the point the arm starts to push the piston of the fuel distributor.
This adjustment can only be done with a running fuel pump
@@inovahightechltd ok....fuel pump running, adjust the co2 screw until I feel the 2mm play on the sensor plate.
Will try now.
Ok....tried it. I ended up turning the CO 2 screw all the way out but dont get any play. When I push the sensor plate down immediate pressure persist with the pumps running.
O boy....what to do now.
Hi Peter. So I made the mistake of turning the CO screw all the way clockwise. I was trying to find where it stops . After doing this I think something came undone. What would recommend that I do? Get a new air flow meter?
No, just open the air flow meter up and remove the arm. You will see the little setscrew. Just turn the setscrew in Arm back out
@@inovahightechltd okay after I get the arm and set screw attached how do I set the CO setting to start it again?
@georgesand4629 you run the fuel pumps by jumping 7 + 8 on FPR socket
Then you adjust the set screw that you hear the fuel injectors squealing when you depress the plate by about 1/16 of an inch. When you release the plate then squealing needs to stop
My 230E K-jetronic plate has no freeplay but the car starts first time cold or hot. After 30 minutes of driving it misfires badly when accelerating. Ive replaced a lot of parts, cleaned the fuel system and had garages check pump and fuel pressures. Ive run out of ideas.
Probably bad fuel air mixture
Hi where do you get those instructions?
Hi George, you mean the manuals in pdf format?
@@inovahightechltd yes. I bought the factory service manuals all 4 of them but they don’t have clear instructions like this.
George, I am not following you here. What is missing in your manuals? The 1-2mm play or what I shared in the video?
Yes the information on your computer isn’t in the paper factory manuals?
Hi George,
Working as consultant for MB, Bosch and SEL before I came to America and some of it can be found in older printed Bosch Technical Notes in German.
The page I showed is from the service manual released in 1990 which I obtained from MB in Stuttgart directly through my connections.
This is group 07.3 Chapter 245 and can be found in the Service Manual for Engine 116 and 117 release 1990.
Hope that helps Peter
Hello mister :) You mention someone in the UK,that had a "500e" with " issues"..regarding this. So here is the Fun fact.There are no 500e"s with KE jetronic. They all have LH electronic injection. So most likely the car you are talking about is a 1991 or 1992 500SL...They had still the KE jetronic :) I have been bingewatching your videos..cause i am on my way to get a 560 Sec...so i am preparing myself to re learn KE stuff etc :) I have had a 190e 2.5 16 before..and dealt alot with KE jetronic..but i need to refresh my knowledge..and i really enjoy your channel. You are welcome to check out my channel also. I havent uploaded a Mercedes video in a long time..but hopefully i will start uploading more videos soon. :) Greetings from Norway ,Stefan :)
@TheCarTakerGarage the UK 500E was actually a souped up 300E with 500SL engine with KE.
I should have mentioned this fact.
Its Same to rolls Spirit 1982 im Haven problem Edith ásele Tation uf prees the gas shots of