[MarkCan]

I keep coming back to this thread and learning.
Thank you H.D.

 

[H.D.]

I‘d like to remind forum members, particularly those who want to give CIS-E related advice, of this (not finished) thread. It holds the key to quick & targeted diagnosis, as a alternative to the time & money wasting guessing & trying that usually takes place in case of CIS-E engine issues.

Based on what I see posted in the relevant BW forums, it is apparently not understood yet. There is more and more wrong info & advice about the KE-Jetronic (also in the form of YouTube videos) posted and spread here at BenzWorld ... and no one objects to it or corrects it.

See my comments to one example of these YouTube videos in post 20 & 23 in This Thread !

 

[Peapvp]

Question, how important is the correct cable connection on the EHA? My connector fell apart when I took it off to verify the coil resistance. I think I got the correct wire on each terminal but the manual is not quite clear of which one Pin 1 is and Pin 2, thanks

 

[H.D.]

Question, how important is the correct cable connection on the EHA?

Peapvp, the importance of the correct cable connection on the EHA is about the same as the importance of the correct connection of the nerves that control the muscles that open and close the hand. Imagine how much it would handicap you if your hand would stay firmly closed when you want to open it and vice versa.

BTW, as I mentioned several times in this thread, it‘s supposed to be a general tutorial about CIS-E Lambda control. Please start a separate thread, if you have further questions about this individual issue of yours.

H.D.

 

[H.D.]

For reasons I explained in This Thread, I discontinue this (unfinished) KE-Jetronic Lambda control thread. In case of further questions I can be reached via PM.

All the best to everybody … and take good care of your CIS-E Mercedes.

H.D.

 

[Benzofthekeys]

I‘d like to remind forum members, particularly those who want to give CIS-E related advice, of this (not finished) thread. It holds the key to quick & targeted diagnosis, as a alternative to the time & money wasting guessing & trying that usually takes place in case of CIS-E engine issues.

Based on what I see posted in the relevant BW forums, it is apparently not understood yet. There is more and more wrong info & advice about the KE-Jetronic (also in the form of YouTube videos) posted and spread here at BenzWorld ... and no one objects to it or corrects it.

See my comments to one example of these YouTube videos in post 20 & 23 in This Thread !

HD, you seem very sharp on Lambda System so here is my dilemma.

I am very stuck with a customer’s 1989 420SEL (California). The engine starts and runs sort of ok! But will not accelerate at all. I put new fuel pumps/filter/accumulator, so fuel pressures are correct. Engine has all new injectors and fuel distributor (Bosch reman), I have replaced the potentiometer and am now on ECU #4 trying to get this thing fixed. The sticking point for me is that the voltage feed from the ECU to the potentiometer and altitude correction capsule is listed as 8 volts (according to WIS/Xentry) and I have 4.3 to 4.8 from my ECU. To me this is a fault that is very important. I have no Lambda function, no duty-cycle response, no response from the X19 Diagnostic socket on the inner firewall (California version) except that the led does light when the button is pressed, but no codes, not even 1-1-1. I recently purchased an ECU that is supposed to be NOS and came in the original MB Dealer parts box. It gives me 4.8 volts at the potentiometer, just like the original and the other three that I have tried. The voltage supply to the ECU is good and the ground is good. Plug terminals and socket pins on the ECU look just fine. I’m pretty much out of ideas here. Big thanks in advance for any ideas on this.

 

[H.D.]

HD, you seem very sharp on Lambda System so here is my dilemma.

Thank you very much for your trust in my advice, Benzofthekeys. You may have overlooked that in several posts in this thread I asked not to use this thread for troubleshooting individual issues, because it is intended to be a tutorial. Please start a separate thread about your issue!

Thanks in advance.
H.D.

 

[Porshapower928]

Incredible write-up H.D. and Thank you for all the information. I have a 1991 560sel with the M117 engine. I read in this paragraph that you stated as follows : Does this mean it wont work on the m117?

 

[H.D.]

Thanks for your positive comment, Porshapower 928.

Does this mean it wont work on the m117?

I‘m not sure what exactly you mean by “it“. ... If you want to know whether an M117‘s ECU doesn‘t feature fault diagnosis via static duty cycle if it the duty cycle is 100% with ignition switched on (engine not running), then the answer is “Yes“ ... (as can be concluded from that text in post 2 ) … unless there is a problem with the meter, or the diagnostic coupling, or the ECU‘s supply voltage from the OVP, or the ECU itself … (as can also be concluded from post 2 ).

BTW, Porshapower928, it is much better to use the forum‘s “quote“ feature instead of such (unnecessarily huge) smartphone screenshots.

In case of further questions about your specific issue, please start a separate thread ! … (Please see what I said in my last post).

H.D.

 

[Porshapower928]

Thank you for clarifying that. Sorry not real tech savvy but will use the quote from n ou w on. Thanks for pointing that out.