Not sure what you mean here, far as I know the KE uses an closed loop all the time but gets input from temp senders to tell the KE ECU that the engine is cold and adjust fuel pressure and idle air delivery. Generally a stuffed O2 will make the car run rich but does not affect it greatly, in fact a KE will run without an fuel ECU and simply becomes a K jet. From experience they go better without an ECU to trim the fuel. Had this in a 190E and there was not much difference between having the OVP relay powering the ECU and not. Having the CIS-E diagram for the 124.030 in front of me I am seeing lots of sensors, such as the throttle valve switch, altitude correction indicator, air flow sensor position indicator, temp sensor coolant (two pronged, one for the injection system and the other to the EZL) and others........

Hendrik
who gets confused by all this tech babble

Mitch Haley wrote:
Hendrik & Fay wrote:
It is a matter on focusing on the things that change from when an engine is cold to when it is warm.

I'd like to know if the lousy running coincides with the changeover from open loop to closed loop. If so, I'd be interested in certain sensors that are ignored in open loop, like the O2 sensor(s).

Mitch.


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