Ecu testing

Hi,

well I cannot comment on your work as I have not seen it and I already commented accuracies. I still consider the probability that your ECU is defective as very small.

Ok, can I send 2 map to you, one orginal not open as referance and one overhauled and you check what you think about my work? And one ECU to confirme that it is okey?

What is this number code on the aluminium rivit on that map?

Mvh. Knut Åge

Hi Knut Åge,

Bosch's manufacturing date codes are explained at the end of Chapter 3.9 of my compendium . I have reported before that I have seen non-working new MAP sensors. Especially those from last years of manufacture in France up till 2002 for Mercedes-Benz are typically very far away from spec.

Volker wrote: Hi Knut Åge,

Bosch's manufacturing date codes are explained at the end of Chapter 3.9 of my compendium . I have reported before that I have seen non-working new MAP sensors. Especially those from last years of manufacture in France up till 2002 for Mercedes-Benz are typically very far away from spec.

Hi,

Thank you, I now have read your chapter 3.9, but I have 2 map that I not understand the code on, one map have "263" and one map have "549", you know what that mean?

Ok, so you also have bad experience with the map from france, I think the map made in germany is better kvality

It look like the tolerance on the coolingwater temperature sensor and fuel injectors also not so tight? That will also make a differance on the fuel/air mixture.
You know the tolerance on this parts?

Mvh. Knut Åge

Hi,

middle number means:

2 or 3: 70s
4 or 5: 80s
6 or 7: 90s
8 or 9: 2000s

After the main time of D-Jetronic in the 70s I have seen heavy deviations, not just for those made in France (but they are famous and Mercedes-Benz has them still in stock). And I had trouble with retrofit diaphragms from the US which did not work as expected. Additionally I have seen Porsche MAP sensors repaired in the US with wrong settings which were actually scrap as they have modified everything inside.

If I am not sure on my own measured references, I check with Bosch reference values. It is a tricky job to do it right as you see in your own case. Type 3 MAP sensors are wrongly believed to be so easy and every American believes he can tune better than Bosch did. Someone in the US started to build in open adjustment screws on type 2 ones as well. Then they use an O2 sensor while driving and believe that they can adjust their 3 screws like that. Others claim that they can change bore of an 1.7 engine to 2.0l and just tweak D-Jetronic a little and it will work. I have had so many emotional discussions on such cases where people claim to know better from their own experience. They want to know why their car does not run and still listen to workshops who tell them it is so easy and that the problem must be their ECU etc.

You have bosch reference value for map 0280100015 and ecu 0280001009?