Bmw 3.0Si D-Jet Bj 1974 - fine tunning

Hi Antonio,

sounds great. Did you reread MAP sensor no ? I might be able to tell you how well it fits or whether you will burn a lot more fuel or risk your engine with lean mixture.

Hi Antonio,
my Opel is equipped wih an AC-unit, too.
All D-Jet-Opels - hand-shifted or automatic - have a dashpot mounted.

Cars with AC have an additional electrical auxiliary valve, that is wired parallel with the electrical compressor-clutch.
When the compressor is switched on, the engine gets extra air and the engine speed increases a little bit.
This picture shows the 'extra-valve':

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My car isn't originally equipped with the AC unit (but with an original unit out of a carburator-model), therefore this valve is missing.
I increased the adjustment of the dash-pot then and don't have any problems from then on.
No problem the compressor-clutch is switching when the engine is running in stable idle.

Maybe it could be helpful to equip your car with a dashpot. Maybe that's not original - but who cares?

Regards
Norbert

Hello,

Thanks for all your enthusiasm.

My mechanical auxiliar air valve has 2 plugs on the base. One is the water temp? And the other could be the electrical extra air when AC on?

Regards
Mota

Hi Antonio,

the auxiiliary air regulator has an expansion element sticking in coolant water, a hose connection and a filter attached. What do you mean by plugs?

Hallo Norbert,

You just found someone that "cares". On this case, someone who "cares a lot"!
He he

Regards
António

Hi Volker,

On the base I have 2 cables connected

Hi António ,

please make a picture so that I recognize what you mean.

Ah... The MAP number is 003 on the end. Difficult to see. Seamed a 008 the other day.

Hi António ,

that is either a water temperature sensor or a thermo time switch and has nothing to do with auxiliary air slide valve.

The 0 280 100 003 is not a good substitute. It will let you consume between 10% to 25% more than the BMW 0 280 100 030 sensor. Your spark plugs should become rather black and CO emissions should be too high at all loads, especially full-load.

That explains why I have 15l/100 at almost any speed. And why it runs so strong and powerfull.
I need an original one!