platonmind |
12-16-2010 05:27 AM |
ECU engine management system
Nothing is wrong with your car. When the battery is disconnected ECU /engine management system/ lost the memory. When the engine is restarted it may idle and run roughly until ECU has 're-learned' the best settings. Take the car for a road test of at least 15 minutes duration, covering as many engine speeds and loads as possible and concentrating on the 2000 to 4000 rpm range. When you are done, let the engine idle for at least 10 minutes, turning the steering wheel occasionally and switching on high current draw equipment such as the heater fan or heated rear window. Keep in mind that ECU required battery power AT ALL TIMES. MB dealer use device 'memory saver' plugged into the cigarette lighter socket, before battery is disconnected so ECU has permanent power until the battery is replaced for new one.
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