Me too!!!
My car did this too. Sometimes at speeds of 150+ which is terrifying (on the autobahn). I couldn?t figure it out and I?m not saying it was for sure the JB4, but when I switched from JB4 to Cobb it completely stopped. I had an older JB4 and I think something was wrong with it which caused the issue. My car did this for like 2 years. It?s been 2 years since it?s done it.
When it would become unresponsive and shut down, I pull over to the side of the road and while stopped, the engine would rev between 1200-2300 but there was zero throttle response. Shut the car off and back on, it would go away and wouldn?t comeback for a few weeks.
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2009 BSM 135i 6MT
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