And in this particular case, the big reason that there would be no difference to what the ECU does is there isn't one. B230E would be strictly mechanical injection, no electronics at all.
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18 years ago
Recently acquired 1989 740/B230E rough starting
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18 years ago
The K jet on this application still doesnt have any additional linkage operated fast idle though, this operation is provided by the aux air valve which would be fully open when cold.
The richer mixture is provided by the warm up regulator jointly operated by electrical heat and being bolted to the engine block, which raises the control pressure of the whole shooting match. N'est pas?
Tim..
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18 years ago
However there is still a start injector which could stick open (or closed) giving start problems. The fuel pump relay is also different to that on LH, Rex/Regina and Motronic systems which are found on 740s and 940s.
All the best, Peter.
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18 years ago
Right. So any improvement by flooring and releasing the accelerator pedal could be explained by a dirty throttle body and not much else except coincidence.
The control pressure is lower when the engine is cold, and acts on the top of the control piston, which allows the control piston in the fuel distributor to rise further for a given force. The force is applied to the control piston by a lever attached to the plate in the air flow. The control piston's rise opens up the fuel passages to the injectors - a higher rise provides higher fuel flow. Very simple in concept, but sure requires accurate machining!