Code 43

i can drive the car up to 15 miles and it drives fine...then anytime after 15 or so miles, it start shaking and losing power and then eventually dies. it will start back up...but then does the same thing. i got a Code 43 on it...says "multiple cylinder misfier detected. peak primary curcuit current not achieved with the maximum dwell time." any advice or suggestions on what this might mean or what may be wrong?? thank you for any help.