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Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
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2 Wochen 2 Tage her #23440
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nordfisch antwortete auf Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
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- Marinus
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2 Wochen 1 Tag her #23445
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Marinus antwortete auf Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
Hi Norbert,
Today i measured again:
Equus 590518: 35 degrees @idle, 34 degrees @3000 rpm
Fluke: 36 degrees. @idle, 37 degress @3000 rpm
1 tool measuring that the value is going down the other tool value is going up, why i have no clue.
Anyway for both tool measured data is within spec.
What about the small capacitor (kondensator) inside the distributor. I measured 190 nF (static measurement with the contact breaker disconnected). Could this part causing troubles? Also the primairy circuit showing factor 2 deviations in voltage between 2 spikes.?
Greetings in advance, Marc.
Today i measured again:
Equus 590518: 35 degrees @idle, 34 degrees @3000 rpm
Fluke: 36 degrees. @idle, 37 degress @3000 rpm
1 tool measuring that the value is going down the other tool value is going up, why i have no clue.
Anyway for both tool measured data is within spec.
What about the small capacitor (kondensator) inside the distributor. I measured 190 nF (static measurement with the contact breaker disconnected). Could this part causing troubles? Also the primairy circuit showing factor 2 deviations in voltage between 2 spikes.?
Greetings in advance, Marc.
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2 Wochen 1 Tag her #23447
von Dr-DJet
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107
Workshops D-Jetronic 28.6.(F),20.9.(ER), K-Jetronic 23.8.(F)
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Dr-DJet antwortete auf Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
Hi Marc,
I do not trust your measuring equipment. I would go to someone with a real ignition oscilloscope as Christian uses during our workshops.
I do not trust your measuring equipment. I would go to someone with a real ignition oscilloscope as Christian uses during our workshops.
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107
Workshops D-Jetronic 28.6.(F),20.9.(ER), K-Jetronic 23.8.(F)
Dieses Bild ist für Gäste verborgen.
Bitte anmelden oder registrieren um das Bild zu sehen.
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2 Wochen 1 Tag her #23449
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nordfisch antwortete auf Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
Hello Marc,
the capacitor looks new.... and new items are often reported as being of bad quality.
I can"t say anything about that. In 55 years of working on motorcycles, cars and other engines, I have never had to replace a capacitor because it was defective.
There are other causes of the differences in the ignition voltage possible besides the distributor, breaker, capacitor and the ignition coil.
Other possible reasons could be:
rotor, cap, cables, spark plugs. And differences in the compression and injection (rich / lean).
I think, you have to find out if the 'low voltages' are related to one or more cylinders or occur 'by chance'.
Regards
Norbert
the capacitor looks new.... and new items are often reported as being of bad quality.
I can"t say anything about that. In 55 years of working on motorcycles, cars and other engines, I have never had to replace a capacitor because it was defective.
There are other causes of the differences in the ignition voltage possible besides the distributor, breaker, capacitor and the ignition coil.
Other possible reasons could be:
rotor, cap, cables, spark plugs. And differences in the compression and injection (rich / lean).
I think, you have to find out if the 'low voltages' are related to one or more cylinders or occur 'by chance'.
Regards
Norbert
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1 Woche 3 Tage her #23461
von Marinus
Marinus antwortete auf Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
Hi Norbert,
You were right about the capacitor. First I tried an old second capacitor (same problem) then a brand new one, namely the Bosch 1 237 330 310. This was an external capacitor of which I had to bend the metal bracket in some places to be able to attach it to the outside of my distributor. The problem was not solved. So it is now certainly NOT the capacitor.
However, I eventually found out that my new spark plug NGK BPR8EIX of cylinder 4 did not spark at the point but at the side. Note that I had found this spark plug type on the strich /8 website before I knew this forum. In Volker's table it says NGK BP6ES. Replaced cylinder 4 with an NGK BP6ES and the big fluctuation was immediately gone. Yippie.
Now there is a small fluctuation/jerking that I actually also want to get rid of. This jerking does not occur during a cold start (1100 rpm), however, when the speed drops below 1020 RPM, it starts to fluctuate. I also noticed that when I spray a little brake cleaner on the ZLS, the speed increases slightly. But I understand from chapter 9 that these valves are never 100% closed, so I assume for now that this is not a problem?
I have ordered a new coil and will let you know if that helps.
Kind regards, Marc
You were right about the capacitor. First I tried an old second capacitor (same problem) then a brand new one, namely the Bosch 1 237 330 310. This was an external capacitor of which I had to bend the metal bracket in some places to be able to attach it to the outside of my distributor. The problem was not solved. So it is now certainly NOT the capacitor.
However, I eventually found out that my new spark plug NGK BPR8EIX of cylinder 4 did not spark at the point but at the side. Note that I had found this spark plug type on the strich /8 website before I knew this forum. In Volker's table it says NGK BP6ES. Replaced cylinder 4 with an NGK BP6ES and the big fluctuation was immediately gone. Yippie.
Now there is a small fluctuation/jerking that I actually also want to get rid of. This jerking does not occur during a cold start (1100 rpm), however, when the speed drops below 1020 RPM, it starts to fluctuate. I also noticed that when I spray a little brake cleaner on the ZLS, the speed increases slightly. But I understand from chapter 9 that these valves are never 100% closed, so I assume for now that this is not a problem?
I have ordered a new coil and will let you know if that helps.
Kind regards, Marc
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1 Woche 2 Tage her #23478
von Dr-DJet
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107
Workshops D-Jetronic 28.6.(F),20.9.(ER), K-Jetronic 23.8.(F)
Dieses Bild ist für Gäste verborgen.
Dr-DJet antwortete auf Jerking (ruckeln?) W114 250 CE caused by distributor radial play?
Hi Marc,
so what did you learn? Never trust another forum, just Jetronic.org !
so what did you learn? Never trust another forum, just Jetronic.org !
Viele Schraubergrüße - best regards, Dr-DJet Volker
Alles für den Mercedes-Benz R/C 107 und W116 in der SLpedia Sternzeit 107
Workshops D-Jetronic 28.6.(F),20.9.(ER), K-Jetronic 23.8.(F)
Dieses Bild ist für Gäste verborgen.
Bitte anmelden oder registrieren um das Bild zu sehen.
Folgende Benutzer bedankten sich: Marinus
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