D-Jetronic Problem!!!!!

Hi Danny,

if you get access to another ECU, try that one first. Bosch should be able to test an ECU deeply. But you know in rare cases it is diffcult with errors that are only temporarily. I myself have such an ECU in my 450 SL. I have tried to verify and isolate that mistake but it does not do me the favor to show that fault long enough. Indeed it did not show it for weeks on my test bench. In the meantime I use another ECU from my stock.

Hi everyone! Latest update and close case:
I found another ECU from another car owner for testing purpose. Turns out my car performs all good in the past 7 days (drove~210 miles):
1) no injectors started when IGN ON
2) all 8 injectors are orderly started when cranking
3) performance are good when running

At this point, I am pretty sure BOSCH did not successfully repair my ECU TWICE, what an unpleasant experience given its reputation and expertise (let along the hard work we have put in the past year in vain).

If not even BOSCH can help repairing my ECU, is there any alternatives/ suggestions to me? (e.g., modify the fuel system, cuz I am desperate now)

Thanks everyone again for your help along the way!

Best regards,
Danny

Hi Danny,

that really is surprising. If you lived inside EU I would now be curious enough to check and - if necessary - repair your ECU. But I cannot import your ECU. So I have to live with my curiosity.

To save Bosch reputation: Those ECUs go to Hilderheim and they normally should have all the equipment to test an ECU deeply. This is the first time that I hear of such a case where Bosch fails and that even twice.