Mercedes Benz 280CE 1974mod M110 Bosch D-Jetronic

Hi Knut Åge,

if you have a scope measure how often and how long the 123 ignition trigger contacts close during a rotation of distributor. You might be surprised.

I am not a big fan of 123 ignition. I would recommend to get your old distributor reconditioned.

Hi,

I dont have scoop, can this be something that i can use to scoop trigger contact and injectors?
www.ebay.com/itm/292521108898

You have bad experience with 123ignition distributer? what problem it can /will make?

Mvh. Knut Åge

Hi Knut Åge,

you could but that is not worth it. I have done that once on a Volvo 123 ignition distributor and did not find 150° closure but 2 x 90° closure on both contacts. 123 could not explain to me why they did it like that. Now this works as ECU filters out a contacts double closure. But if there is any noise on one of the lines it would end in desaster as ECU might suddenly recognize double rpm.

I have now find the problem with this car, it was å defekt androidcell in map sensor, so it going too lean.
The Bosch nr. Was correct 0 280 100 111, it have not be open or adjusted. With a new used knowing working map sensor, the engine is now running Nice again.
Mvh. Knut Åge

Hi Knut Åge,

really a broken Aneroid cell? In a type 3 MAP sensor? Well I have seen them go off linear but never a broken one so far. Are you sure it was not just detuned?

I have not open it yet, so can not be 100% that one of the androidcell is broken.

But I have see this 2times on type 2map sensor and than think the same can happend with type 3map sensor? The car have working fine before with this map sensor, it have not be open or adjusted. Have you other teori on what can detuned the map sensor?

My teori is if it is hole in one of the androidcells than that androidcell will expand and make the map sensor detuned so the a/f mixture will be too lean, what you think about that teori?

Mvh. Knut Åge