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hava a 2010 fortwo it stared to randomly jerks when put in to drive and stops in a couple of seconds once started driving, and runs fines afterwards any idea
 

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i have had what i think is bad gasoline causing that. when it happens i put a can of HEET ((from Walmart) or some other moisture removing fluid) and it goes away

Bill
 

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This could be a variety of things, sadly. From personal experience, "jerking" could be caused by:

  • Worn engine mounts.
  • Harsh clutch engagement.
  • Weak battery.
  • Fouled/worn spark plug(s).
  • Low compression.
  • O2 sensor problems.
  • Bad coil plug(s).

That's not a definitive list, but I'd check the easy stuff first. Is your check engine light on? If so, solve that first. If not, make sure your vehicle is tuned up and is up to date on maintenance.
 
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