rpreuss Report post Posted March 11, 2010 I saw oldschool1962 mentioned this in two other threads. Though I would start a new one with what he reported..... Has anyone experienced a stumble or lope in the vehicle when it is moving at 45-47mph? It's kinda like the car can't decide whether to use EV or the ICE. it is very noticeable and abrupt and is something that you can't miss. It happened when I was driving in an area where the speed limit was 45 and the road is relatively flat for about 2 miles. Wasn't trying to keep it in ev mode just driving the car but the pressure on the pedal was at a point where the car started to buck......yeah....that's the description I was grasping for.....buck! Yes. I have noticed this several times. I concluded it was a minor "bug" in the software design of the hybrid control computer software. Remember the "rule" the ICE must be running above 47mph. This is to keep the MG's from spinning too fast. Now, if I am uncounsiously driving at EXACTLY 47 in a situation where below that speed the car wants to be in EV mode, the engine will start and stop rather quickly if I am sitting right at the threshold and slightly varying the speed. I figured out that after a while, enough people would observe this that they might add a little hysteresis to the algorithm at that point. Maybe not be in too much of a rush to shut off the ICE as the speed drops just below 47. I was just going to wait for rev 1.02 of the software and in the meantime, increase or decrease my speed away from 47 to stop the "buck". But maybe that's "passing the buck" :hysterical2: So, has anyone else observed this issue and have any ideas about it? Quote Share this post Link to post Share on other sites