[LegitF30]

Originally Posted by LegitF30

But that's the thing i know what your probably talking about how the car will jerk from time to time but this feels like misfiring but my car isn't misfiring . I've checked my whole ignition system and changed spark plugs like a month ago with no problems. This "jerking" feeling just started a week ago.

Update: last week I was determined to figure it out. The first thing I did was bleed the fuel line that connects to cylinder 1 injector. Gas started spewing out, which was to be expected of course then tightened it back up. Ran the car and driving it harshly just to see if the problem came back. It did not. (However) it came back after a few days right after I went to the drag strip. So I did the same thing and it went away again.

[TK335iMSPT]

Originally Posted by LegitF30

Update: last week I was determined to figure it out. The first thing I did was bleed the fuel line that connects to cylinder 1 injector. Gas started spewing out, which was to be expected of course then tightened it back up. Ran the car and driving it harshly just to see if the problem came back. It did not. (However) it came back after a few days right after I went to the drag strip. So I did the same thing and it went away again.

What's the reason for this?

I experience the same issue of jerking. Traffic is horrendous. The 1 to 2 up/ down shifts are very rough. Dealer claims this is normal operation.

I also have a "jerk/stutter" when applying light throttle at about 62/64mpg on a straight level road. The car feels like it's misfiring but it was not.

Car is a 2014 335i Xdrive 46k miles

[LegitF30]

Originally Posted by TK335iMSPT

What's the reason for this?

I experience the same issue of jerking. Traffic is horrendous. The 1 to 2 up/ down shifts are very rough. Dealer claims this is normal operation.

I also have a "jerk/stutter" when applying light throttle at about 62/64mpg on a straight level road. The car feels like it's misfiring but it was not.

Car is a 2014 335i Xdrive 46k miles

Your saying it only happens from 1st to 2nd gear?

[TK335iMSPT]

Originally Posted by LegitF30

Your saying it only happens from 1st to 2nd gear?

The rough shift yes. The jerking at 62mph is usually 7th or 8th gear on the highway.

[LegitF30]

Have you tried resetting the transmission?

[HighlandPete]

A couple of clunky gearchanges on a cold engine/gearbox pull away may be normal, a few extra seconds before moving off can virtually eliminate that behaviour. Other than that I can't see any jerky changes being normal.

Rapid on-off accelerator use can cause harder and jerky shifts, but smooth throttle action should eliminate that. In my experience ZF 8-speed boxes, are silky smooth in operation, particularly in Comfort mode.

I note some users with issues are xDrive users, tires and/or pressures can cause the problems being highlighted.

[HighlandPete]

Originally Posted by TK335iMSPT

What's the reason for this?

I experience the same issue of jerking. Traffic is horrendous. The 1 to 2 up/ down shifts are very rough. Dealer claims this is normal operation.

I also have a "jerk/stutter" when applying light throttle at about 62/64mpg on a straight level road. The car feels like it's misfiring but it was not.

Car is a 2014 335i Xdrive 46k miles

For elimination, I'd definitely start by checking tires/pressures. Have you changed tires, making it better/worse?

[TK335iMSPT]

Originally Posted by HighlandPete

For elimination, I'd definitely start by checking tires/pressures. Have you changed tires, making it better/worse?

I'm a bit anal about tire pressure. Always keep it 32front 38 rear (door placard states those pressures) . I recently switched to Michelin Pilot sport A/S 3+. No difference in those characteristics.

[hrdboiled]

I have 2013 6mt. jerkiness would happen off and on esp when it was cold. It was getting worse to where it would happen every time I started the car. It would usually last for like 5 seconds. If I applied too much thottle it would jerk like when you were first learning to drive stick. I learned to live with it.

Anyway, my battery died. After I replaced it the jerkiness disappeared. it's been 2 weeks now and no more jerkiness. Maybe something got reset?

[obeeone]

Originally Posted by TK335iMSPT

I also have a "jerk/stutter" when applying light throttle at about 62/64mpg on a straight level road. The car feels like it's misfiring but it was not.

Car is a 2014 335i Xdrive 46k miles

Just this week I have noticed the exact same issue. Slight hesitation/quick jerking
while cruising highway speeds. Only on light throttle inputs like 10-15 percent at about 2000 rpm and 65-70 mph. Honestly feels like a quick backfire.
Is your car still doing this and did you ever figure it out?

My car is 2015 335i XDrive 36k miles.

PS also has this metallic whirring noise at low speeds that I cannot find.

[TK335iMSPT]

Originally Posted by obeeone

Just this week I have noticed the exact same issue. Slight hesitation/quick jerking
while cruising highway speeds. Only on light throttle inputs like 10-15 percent at about 2000 rpm and 65-70 mph. Honestly feels like a quick backfire.
Is your car still doing this and did you ever figure it out?

My car is 2015 335i XDrive 36k miles.

PS also has this metallic whirring noise at low speeds that I cannot find.

Car is still doing it. Funny you mentioned back fire because I just got a misfire on cly3 a few days ago. There a CEL that went away on its own the next start. Brought it to bmw and they state the car is functioning as intended.... yea ok.

[floridaorange]

My f30 used to do this on occasion - was a really weird feeling.

[tomzjack]

Originally Posted by obeeone

Just this week I have noticed the exact same issue. Slight hesitation/quick jerking
while cruising highway speeds. Only on light throttle inputs like 10-15 percent at about 2000 rpm and 65-70 mph. Honestly feels like a quick backfire.
Is your car still doing this and did you ever figure it out?

My car is 2015 335i XDrive 36k miles.

PS also has this metallic whirring noise at low speeds that I cannot find.

I also had a similar situation happen. just want to shared with you guys. About this issue for me is wiring problem from ECU to spark plug, i changed the full set then problem solved.

Hopefully this can help u guys. Thanks

[ryanj2012]

Originally Posted by tomzjack

I also had a similar situation happen. just want to shared with you guys. About this issue for me is wiring problem from ECU to spark plug, i changed the full set then problem solved.

Hopefully this can help u guys. Thanks

I know this is a bit old but hoping for some more details. I recently picked up a 2012 335i and it has this jerky behavior when accelerating when cold. When you say you replaced ‘the whole set’ do you mean spark plugs or spark plug wires or both? Thanks in advance!

[f30jadyn]

Pretty normal with ware, just always let your car idle and warm up before driving.