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      04-06-2017, 08:14 PM   #1
maurim3
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F30 2012 328i . hesitation at low rpm s

Ive got the worst of luck with this car. It only has like 19.000 miles but it has all kids of problems.

this is my problem

you start to accelerate on low rpm on 1st or 2nd or any gear (like 1500-2000) and you fell like the car is hesitating or like its missing a beat. If you go beyond 3.000 rpms everything is normal. Also I you WOT the car is perfect. Another thing im feeling now is when Im stopped in Drive. And when I release the brake to accelerate I feel a small shake. CEL has not been triggered. I scanned the car and there was NO error stored. I went ahead and changed the 4 spark plugs with gem and the problem remained exactly the same. I also had 4 new injectors and went ahead a changed them and coded them. But the problem persists.
My next guess is changing the coils.

Any ideas.

Ps dealer will not take my car cause its a direct import.
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      04-07-2017, 08:52 AM   #2
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The shake when releasing the brake pedal may be your start-stop feature turning the engine on. Is start-stop active when you drive?
Are you driving AT or MT? If AT, try accelerating in manual mode and see if you have the same hesitation. I don't mean just throwing the shift lever over to the left. You have to also push it up or down.
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      04-07-2017, 11:06 AM   #3
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Have you always run the car in low rpm? My dad's 2013 328i has the same problem due to engine speed too slow.
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      04-07-2017, 01:03 PM   #4
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Does this only happen during cold starts, or can you reproduce this issue consistently ?
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      04-07-2017, 02:28 PM   #5
maurim3
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Quote:
Originally Posted by jparnes1 View Post
The shake when releasing the brake pedal may be your start-stop feature turning the engine on. Is start-stop active when you drive?
Are you driving AT or MT? If AT, try accelerating in manual mode and see if you have the same hesitation. I don't mean just throwing the shift lever over to the left. You have to also push it up or down.
Im not using the start stop. It desactivated. Its an automatic. Ive tested in manual mode also. Does the same thing. Im changing the coils today with my 228i and see what happens.
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      04-07-2017, 02:31 PM   #6
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Quote:
Originally Posted by Patrick852 View Post
Have you always run the car in low rpm? My dad's 2013 328i has the same problem due to engine speed too slow.
Yes . I always run it in low rpms. Shifts at around 2500 automatically. It has started with this issue just a few weeks ago. And I have the car since 2012 and never noticed it before.
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      04-07-2017, 02:32 PM   #7
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Quote:
Originally Posted by uncleruckus View Post
Does this only happen during cold starts, or can you reproduce this issue consistently ?
Its going on constantly. Feels like a misfire . But there are no codes stored.
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      04-07-2017, 04:12 PM   #8
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Quote:
Originally Posted by uncleruckus View Post
Does this only happen during cold starts, or can you reproduce this issue consistently ?
I notice it sometimes after cold starting. It seems the torque converter locks up a little early, feels like when driving stick and you engage the clutch too soon. Happens less in sports mode. However, it seems like the poster is saying this happens all the time.
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      04-07-2017, 04:58 PM   #9
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Quote:
Originally Posted by bimmer456 View Post
I notice it sometimes after cold starting. It seems the torque converter locks up a little early, feels like when driving stick and you engage the clutch too soon. Happens less in sports mode. However, it seems like the poster is saying this happens all the time.
I was actually thinking along the same lines.... I know for my car, the shifting is a bit rough on cold starts. However, it goes away as soon as car is warm, and I cannot consistently produce it, so I don't think it's the same issue.
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      04-07-2017, 05:42 PM   #10
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Quote:
Originally Posted by maurim3 View Post
Ive got the worst of luck with this car. It only has like 19.000 miles but it has all kids of problems.

this is my problem

you start to accelerate on low rpm on 1st or 2nd or any gear (like 1500-2000) and you fell like the car is hesitating or like its missing a beat. If you go beyond 3.000 rpms everything is normal.
It's just the car telling you it does not like low RPM's, just drive it the way BMW suppose to be driven, keeping revs high, it completely transforms the driving experience.
I learned this with my first bimmer 1988 318i, drove it gently not even knowing what the car was about, until one day I was told to wake up the beast....
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      04-07-2017, 07:20 PM   #11
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this is a very well known issue with BMW's and has been thoroughly discussed just about everywhere you look.

you need an ECU tune to code this out.
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      04-11-2017, 09:08 AM   #12
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Quote:
Originally Posted by STR8-6IX View Post
this is a very well known issue with BMW's and has been thoroughly discussed just about everywhere you look.

you need an ECU tune to code this out.
Really havent found one with the same problem. And they dont want to do a software update if theres no check engine light on .
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      04-11-2017, 10:48 AM   #13
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Quote:
Originally Posted by maurim3 View Post
Really havent found one with the same problem. And they dont want to do a software update if theres no check engine light on .
you've driven others that do not have the lag?

does your engine burn oil?
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      04-17-2017, 11:23 AM   #14
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Quote:
Originally Posted by STR8-6IX View Post
you've driven others that do not have the lag?

does your engine burn oil?
Its not lag. Its missing while climbing rpms. 2000 to 3000 rpms 1/4 throttle.

at wot the car goes perfectly
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      04-17-2017, 11:33 AM   #15
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Quote:
Originally Posted by maurim3 View Post
Its not lag. Its missing while climbing rpms. 2000 to 3000 rpms 1/4 throttle.

at wot the car goes perfectly
scan car for misfire. replace ignition coil on misfiring cylinder. replace all 6 spark plugs.

update.. you have no errors? strange..
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      04-17-2017, 11:34 AM   #16
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Quote:
Originally Posted by maurim3 View Post
Its not lag. Its missing while climbing rpms. 2000 to 3000 rpms 1/4 throttle.

at wot the car goes perfectly
are you using premium gas?
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      05-18-2017, 05:18 PM   #17
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Quote:
Originally Posted by IndotagSwizz View Post
are you using premium gas?
Yes.
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      05-18-2017, 05:21 PM   #18
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Quote:
Originally Posted by STR8-6IX View Post
scan car for misfire. replace ignition coil on misfiring cylinder. replace all 6 spark plugs.

update.. you have no errors? strange..
this is a n20 so 4 cil. Changed the 4 spark plugs and 4 coils.

No misfire codes !!

Im starting to lean on a motor mount or some kind of driveline vibration. Its all too weird. Motor shakes a bit more that i could call normal .
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      05-24-2017, 09:04 AM   #19
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ok, so checked the transmission fluid level on the car, thinking it might have a low level, and to my surprise the fluid was mixed with water. So that might be the problem. I will change fluid, filter/pan and transmission cooler, and report back.

Last edited by maurim3; 05-24-2017 at 01:57 PM..
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      05-24-2017, 11:04 AM   #20
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I had a 2012 328i and it was always rough at lower RPMs unless I drove in Sport mode. Had a 328i loaner and it was the same; the 4-banger paired with 8-speed tranny seemed to struggle under about 2200-2400 RPMs
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      05-24-2017, 11:28 AM   #21
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Quote:
Originally Posted by maurim3 View Post
this is a n20 so 4 cil. Changed the 4 spark plugs and 4 coils.

No misfire codes !!

Im starting to lean on a motor mount or some kind of driveline vibration. Its all too weird. Motor shakes a bit more that i could call normal .
your mileage is way too low to be having issues like that.

Quote:
Originally Posted by Krasna View Post
I had a 2012 328i and it was always rough at lower RPMs unless I drove in Sport mode. Had a 328i loaner and it was the same; the 4-banger paired with 8-speed tranny seemed to struggle under about 2200-2400 RPMs
turbo lag.
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      10-03-2017, 04:54 PM   #22
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i have the same issue with my 2014 F30 N20 . I found that air filter enclosure wasnt properly alligned and closed even if the 4 clips were closed. Car runs better and the hesitation is very minimal . I am about the order a K&N air filter to improve air flow
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