I'm pretty sure the jerking stops when I take out the JB+. I recently put the JB+ back in and it's happening again. Almost feels like a giant pushing and pulling the car from behind really rapidly. It's REALLY unpleasant.
It's definitely not the fuel, or the way I am driving.
I'm going to take the JB+ out again and if the lurching/jerking stops I will be leaving it out...for good. If it's still there I will take the car to the dealer and ask for the newest software update (I read that one of the updates fixed a bucking issue).
At this point I almost 100% positive it's the JB+.
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