Die Bosch D-Jetronic war 1967 die erste Großserien elektronische Einspritzung der Welt. - Bosch's D-Jetronic was the first mass-production electronic fuel injection.

Help D-Jet Mercedes M110 280CE

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
05 Jun 2015 20:59 - 05 Jun 2015 21:01 #1239 by laegaard
Help D-Jet Mercedes M110 280CE was created by laegaard
Hi

I have been struggling with my 1974 Mercedes 280CE M110 for a long time.. i just won't run..
I can idle if i disconnect the MAP/SDF. but as soon as i connect the vacuum to the MAP/SDF the engine just dies :(
I have vacuum testet the MAP/SDF and it holds Vacuum just fine. i have attached a picture of the connector, i don't know if it set in the right direction..
I have also adjusted the trigger points with Norbert Fischer's tool..
Any help pointing me in the right way, is much appreciated..

This image is hidden for guests.
Please log in or register to see it.


This image is hidden for guests.
Please log in or register to see it.



VIDEO: goo.gl/photos/sbmrdNXk86JzUqqk9

Regards

Mads
Dänemark
Last edit: 05 Jun 2015 21:01 by laegaard.

Please Log in or Create an account to join the conversation.

More
05 Jun 2015 21:15 #1240 by Obelix
Replied by Obelix on topic Help D-Jet Mercedes M110 280CE
Hello Mads,
as i can see from your Pictures , the plug on your map sensor is the wrong way round. Put it in correctly and try again.

Best regards,
Obelix
Gruß
Christian

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
05 Jun 2015 21:22 #1241 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
Ok, so it's green to 7?

Mads

Please Log in or Create an account to join the conversation.

More
05 Jun 2015 22:55 #1243 by Obelix
Replied by Obelix on topic Help D-Jet Mercedes M110 280CE
That`s correct..

Regards
Obelix
Gruß
Christian

Please Log in or Create an account to join the conversation.

  • Dr-DJet
  • Away
  • Moderator
  • Moderator
  • Dr-DJet repariert und sammelt alles! :-)
More
06 Jun 2015 09:27 #1247 by Dr-DJet
Replied by Dr-DJet on topic Help D-Jet Mercedes M110 280CE
Hi,

turning the connector will unfortunately not help. It is cleverly wired in such a way that primary coil is on the outside and secondary on the inside. So twisting connector still keeps the same coil connected. :cheer:

When you disconnect the MAP sensors vacuum line, you enrich the fuel mixture as it will then signal full-load pressure to ECU. If that helps to make your car run, you seem to have a mixture problem that you overcome by removing vacuum hose. Concluding now that the MAP sensor is the problem, is not a valid argument.

Have you checked ignition and fuel pressure in loop line first? Have a look at my checklist for systematic testing.
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 20.9.(ER)

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
06 Jun 2015 09:38 #1248 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
Thank you Volker. I have checked ignition it's 00 at around 800 rpm.. i will look at the checklist..

Mads

Please Log in or Create an account to join the conversation.

  • Dr-DJet
  • Away
  • Moderator
  • Moderator
  • Dr-DJet repariert und sammelt alles! :-)
More
06 Jun 2015 09:40 #1249 by Dr-DJet
Replied by Dr-DJet on topic Help D-Jet Mercedes M110 280CE
Hi Mads,

two things start to make me wonder:

1. Why does your MAP sensor not have a black cover? Did you or someone else readjust it?
2. What have you checked before assuming trigger points and MAP sensor as problematic?
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 20.9.(ER)

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
06 Jun 2015 10:29 #1253 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
I took of the cover, before i found this site :) Sorry about that..
I have changed, sparks, wires, distributor cap, rotor.
Since i got the car a few years ago, its been running worse over time, it startet with some small setout, when running at a steady rpm. just like it just missed a spark or someting like that..

Mads

Please Log in or Create an account to join the conversation.

More
06 Jun 2015 11:16 #1254 by nordfisch
Replied by nordfisch on topic Help D-Jet Mercedes M110 280CE
Hi Mads,
do all the checks on Volkers checklist. The D-Jetronic is a fully-integrated System, therefore the best is to check all components / values instead of just the few 'critical' ones.
There is one more list that maybe helpful, in addition to Volkers list: Measurements M110 direct download
Here is the instruction: Measurements instruction

Regards
Norbert

Please Log in or Create an account to join the conversation.

More
06 Jun 2015 11:50 #1255 by nordfisch
Replied by nordfisch on topic Help D-Jet Mercedes M110 280CE
Hi Mads,
one more idea:
Looks like you replaced the caple-lugs at the connector. There exist two different versions of these lugs: AMP 2,8x0,8mm and AMP 2,8x0,5mm. The second type is correct - the other type won't give good electrical contact or gives no contact at all.
Unfortunately, the false type of these lugs is more common and reported as the correct one in the WWW.

Regards
Norbert

Please Log in or Create an account to join the conversation.

  • Dr-DJet
  • Away
  • Moderator
  • Moderator
  • Dr-DJet repariert und sammelt alles! :-)
More
06 Jun 2015 18:50 #1256 by Dr-DJet
Replied by Dr-DJet on topic Help D-Jet Mercedes M110 280CE
Hi Mads,

when you changed contactor and rotor on ignition distributor: Did you check dwell and ignition timing at 3000/min, 1500/min and idle ?
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 20.9.(ER)

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
06 Jun 2015 19:09 #1257 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
Have not checked the dwell.. Only changed the distributor cap, and rotor, not the points.. how nuch is the dwell supposed to be?
I have only checked the timing at idle.. But i can't get it to run at 1500 and 3000..

Mads

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
06 Jun 2015 19:10 #1258 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
Norbert: is it the connector to the MAP you at talking about?

Mads

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
06 Jun 2015 19:45 #1259 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
I have checked the MAP, the primary winding reads 91.. but the secondary i open.. no resistance from pin 8-10..

Mads

Please Log in or Create an account to join the conversation.

More
06 Jun 2015 20:56 - 06 Jun 2015 21:01 #1260 by nordfisch
Replied by nordfisch on topic Help D-Jet Mercedes M110 280CE
Hi Mads,
did you check at the MAP contacts itself or at the connector?

Maybe the reason are wrong or non-contacting cable-lugs (see my message above).
All the cable lugs inside the connectors of the D-Jetronic are the AMP 2,8x0,5 mm type.
Pushing the new lugs without the housing on the pins and realizing they don't fit, it's the wrong type (2,8x0,8mm).

As far I know, Volker checked many dozens of MAPS and the electrical part didn't fail even one time...

Regards
Norbert
Last edit: 06 Jun 2015 21:01 by nordfisch. Reason: additions

Please Log in or Create an account to join the conversation.

  • Dr-DJet
  • Away
  • Moderator
  • Moderator
  • Dr-DJet repariert und sammelt alles! :-)
More
06 Jun 2015 20:58 #1261 by Dr-DJet
Replied by Dr-DJet on topic Help D-Jet Mercedes M110 280CE
Hi Mads,

if you do not see 360 Ohm on secondary coil, your engne cannot run. Check connectpr on MAP sensor (inner 2 pins) whether they are loose. And BTW you should also measure resitance to ground: Must be infinite.

Last recommendation: Measure finally on Pins (same nos) on ECU. That eliminates wiring problems. A defective secondary winding is very unusual. That is why I assume connector problems.
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 20.9.(ER)

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
06 Jun 2015 21:16 - 06 Jun 2015 21:27 #1262 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
Did the ECU test, did not look good :(

Pin 1 air temp = open (no ohm) (also tested the sensor, and it's defect)
pin 8 MPS secondary coil = open (no ohm)
Pin 23 coolant temp = open (no ohm)

Did the test with battery disconnected, and ECU cable disconnected..
Don't have time to do more test today, but will get back tomorrow..

Mads

This image is hidden for guests.
Please log in or register to see it.

Last edit: 06 Jun 2015 21:27 by laegaard.

Please Log in or Create an account to join the conversation.

More
06 Jun 2015 21:53 - 06 Jun 2015 22:05 #1263 by nordfisch
Replied by nordfisch on topic Help D-Jet Mercedes M110 280CE
Hi Mads,
I think someone replaced all the cable lugs with the wrong type.

You can check this only by inserting a sheet metal or a contact with 0,50 mm into them.
When there is few or no resistance at pushing them in, it's the wrong type.

It's no good idea to press these non-fitting parts together with a pliers. Problems will come back soon or later.
You need a special crimping pliers to do the job perfectly.

Here's where you can order the parts and the tool in Germany: Link

I could help you, if you have any problems in buying the parts.

Tomorrow I will have to do some work at my own car...

Regards
Norbert
Last edit: 06 Jun 2015 22:05 by nordfisch.

Please Log in or Create an account to join the conversation.

  • laegaard
  • Topic Author
  • Offline
  • Junior Member
  • Junior Member
More
07 Jun 2015 21:14 #1283 by laegaard
Replied by laegaard on topic Help D-Jet Mercedes M110 280CE
Is there a way i can repair the secondary coil on the MAP?

Mads

Please Log in or Create an account to join the conversation.

  • Dr-DJet
  • Away
  • Moderator
  • Moderator
  • Dr-DJet repariert und sammelt alles! :-)
More
07 Jun 2015 21:42 #1284 by Dr-DJet
Replied by Dr-DJet on topic Help D-Jet Mercedes M110 280CE
Hi Mads,

it would be the first case where I see a broken coil. Have you removed the connector and measured directly on the two inner pins of MAP sensor? When I see all your problems, I am doubtful on your wiring harness. Those are simply too many failures to be happening all at the same time.

Of course, everything can be a first time. You cannot repair that coil. Because even if you would be able to fix the coil, you would have to readjust the MAP sensor to references.
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 20.9.(ER)

This image is hidden for guests.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

Time to create page: 0.149 seconds
Powered by Kunena Forum
Forum Latest
Latest car articles

Dr-DJet - 17 May 2016

Chapter 15 of D-Jetronic article series by Dr-DJet describes specialties of Jaguar's D-Jetronic...

Dr-DJet - 31 March 2015

Chapter 9 of Dr-DJet's article series describes auxiliary air valve (or air slide valve), cold...

Dr-DJet - 06 December 2014

Chapter 14 of article series by Dr-DJet gives you a detailled checklist for ticking off every...

Dr-DJet - 06 December 2014

Appendix B of D-Jetronic article series by Dr-DJet lists pinout of all ECUs of all D-Jetronic...

Dr-DJet - 16 November 2014

Chapter 10 of D-Jetronic article series by Dr-DJet describes replacement of your engine wiring...