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The BMW Range
3 Series
E46
Engine shaking when start, car rpm jumping up & down
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<blockquote data-quote="azeL_Inc" data-source="post: 32360" data-attributes="member: 15688"><p>Something weird happen to my car yesterday & today, n i think it still persists, no error light whatsoever.Symptoms: When i start the car, the car shaking really bad, coz the engine like dying off and on, RPM jumping from .6k to 1.5k... (my normal idle RPM is 8k).And it only happens when i first start the car, doesnt matter the car is hot or not (i mean it doesnt only happens during morning cold start). What is the weirdest to me is that, during that period, sometimes like there s someone pressing the gas, coz the rpm went up to 2k for few seconds, on its own. weird huh. it happens for 1-5 mins, if i force the car to move with that condition, engine goes back normal.Btw, i just picked the car from workshop 3 days ago, previously, I left the car at a workshop for some minor repair at the front, replace bumper, hood & paint job. The car wasnt moving for 3-4 months. Just replaced the engine mounting.Any idea on the possible cause? Dont think misfire also, coz after around 10 mins, it normal back, but the shaking is reallllly bad.it s N42 btw</p></blockquote><p></p>
[QUOTE="azeL_Inc, post: 32360, member: 15688"] Something weird happen to my car yesterday & today, n i think it still persists, no error light whatsoever.Symptoms: When i start the car, the car shaking really bad, coz the engine like dying off and on, RPM jumping from .6k to 1.5k... (my normal idle RPM is 8k).And it only happens when i first start the car, doesnt matter the car is hot or not (i mean it doesnt only happens during morning cold start). What is the weirdest to me is that, during that period, sometimes like there s someone pressing the gas, coz the rpm went up to 2k for few seconds, on its own. weird huh. it happens for 1-5 mins, if i force the car to move with that condition, engine goes back normal.Btw, i just picked the car from workshop 3 days ago, previously, I left the car at a workshop for some minor repair at the front, replace bumper, hood & paint job. The car wasnt moving for 3-4 months. Just replaced the engine mounting.Any idea on the possible cause? Dont think misfire also, coz after around 10 mins, it normal back, but the shaking is reallllly bad.it s N42 btw [/QUOTE]
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Engine shaking when start, car rpm jumping up & down
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