JNT are you talking about voltage (volts) or current (amps or rather milliamps)? MBDoc told that the current key on-motor off is typically 20 milliamps (mA). The resistance of the EHA is about 20 ohms so it gives a voltage drop over the EHA that is about 20*20/1000=0.4 V or 400 mV. The change in EHA current makes a change in the mixture strenth. On the other hand we know that the KE Jetronic full load enrichment should be about 10% over stoichiometric (AFR 14.7) in the rpm range 1500 to 3000 and 5% in the range over 4000 rpm correspondingly (Maisch). I just wondered if anybody has measured current readings (and AFR readings) at full load and WOT, because I haven't found accurate values anywhere. The only graph of the current - AFR - relationship I found on the book by Probst, but it was symbolic without exact values..

References:SAE paper "KE-Jetronic - A new Continuously Injecting Electronically Controlled Multipoint Injection System with Limp-Home Capability" by Wolfgang Maisch, "Gasoline Fuel-Injection System KE-Jetronic", Robert Bosch GmbH 2000 and "Bosch Fuel Injection & Engine Management" by C. O. Probst, Bentley Publishers

tomant