[Katin]

Originally Posted by eluded

But I have a manual transmission. I know the automatics faster and what not but it has no soul.

If I had a dollar for every time this guy said something of this nature... 😜

I love his passion but am worried he might get goofy when the automatic is the only choice. Really though I like this guy!

[Tyresian]

Originally Posted by Dan203

My 135i was basically the same engine, straight 6 twin turbo, so I know what turbo lag is and this isn't that.

Tryesian explained it well. Sometimes when taking off from a stop, or a slow roll into a turn, you'll push the gas and it doesn't feel like it does anything for a second. It feels very non-linear, which causes me to over correct and push harder which then causes it to lurch a bit when it finally kicks in. I am getting use to it, but it's still there and kind of annoying.

I wish DCT was an option on this car, I would have got that instead.

Dan and Otay, do you guys have the 2TB Sport Transmission, or just the 205 automatic? (Technically the same transmission but different programming and can be coded)

I have the standard 205 that was causing the issue which seems like it is fixed in Sport with the MPPK, if not fixed it is vastly improved.

[Dan203]

I don't know. Looking at the 2016 340i xDrive options the only transmission related one is the manual.

Do they have an MPPK for the 2016 340i? When I look at the showbmwusa website it lists nothing when I pick the 340i

[Tyresian]

Dan203 The MPPK for the 340i is not out yet from what I understand. Also they are now bundling the MPPK with an exhaust which will be the MPPSK (M Performance Power and Sound Kit). Which unfortunately will drive up the cost, I wonder if they felt there is less headroom to modify the programming on the 340 so decided they need a freer flowing exhust? Unless it is just more sound like the current MPE but that seems very silly.

To know what auto transmission you have you can go to www.bmwvin.com and see if you the have the 205 or the 2TB. It is possible that all 2016s and on may now have sport, I sure would hope so. If you have paddle shifters that is supposed is also a sign of the sport transmission.

[otay]

Originally Posted by paul e

Maybe a problem in the pedal electronics? There's something called a pedal travel sensor.

Hmmm. I could probably change this myself...

https://www.getbmwparts.com/parts/in...&siteid=214672

[otay]

Originally Posted by Tyresian

Dan and Otay, do you guys have the 2TB Sport Transmission, or just the 205 automatic? (Technically the same transmission but different programming and can be coded)

I have the standard 205 that was causing the issue which seems like it is fixed in Sport with the MPPK, if not fixed it is vastly improved.

I have 2TB / Sport Automatic. Sport mode makes it a bit less noticeable, but still there. Have been thinking about MPPK, and if or how it might change my throttle feel. BTW, drove a friend's '14 335i with MPPK and did not notice this beginning of pedal travel "lag". May or may not have anything to do with MPPK though...

I've only used Sport+ a couple times (like when I first got the car), but will try it over the next few days at the usual stop signs where this problem shows up.

[paul e]

Originally Posted by otay

Hmmm. I could probably change this myself...

https://www.getbmwparts.com/parts/in...&siteid=214672

Make sure you get the correct one, there is one for a manual and a separate one for the automatic. You're showing the manual one.

This is the auto pedal:

https://www.getbmwparts.com/parts/in...&siteid=214672

[chuckles01]

Originally Posted by Dan203

19" 407 wheels. I got the track handling package and that's what it came with. I plan on getting some all season tires put on it soon and may change the wheels at the same time. Not sure I like the big low profile ones. I've always kind of preferred having a bit more tire. (I had 17" put on the 135i)

But the lag I'm talking about is mainly when I take off, especially from a slow roll like when making a left hand turn. It's like it doesn't respond at first so I over correct and push it too much then all the sudden it grabs and I lurch forward. Although it's also noticeable when I'm on the freeway and need to pass.

I have a 6mt f30 328 but I also experience the lag you're describing. It's usually when I'm rolling in traffic under 2k rpm, then accelerate or mash the throttle. There's considerable lag and it takes a couple seconds before it feels like it's doing something. It's slightly less obvious in sport / sport+ but still really noticeable. Quite annoying actually.

If I'm already on the move the lag is much less noticeable. However, I still feel a lag in throttle tip in when shifting gears in comfort mode. Makes it sometimes harder to time the shifts smoothly.

I wonder if an ER charge pipe will help a little with this?

[hollandog]

Originally Posted by chuckles01

I have a 6mt f30 328 but I also experience the lag you're describing. It's usually when I'm rolling in traffic under 2k rpm, then accelerate or mash the throttle. There's considerable lag and it takes a couple seconds before it feels like it's doing something. It's slightly less obvious in sport / sport+ but still really noticeable. Quite annoying actually.

If I'm already on the move the lag is much less noticeable. However, I still feel a lag in throttle tip in when shifting gears in comfort mode. Makes it sometimes harder to time the shifts smoothly.

I wonder if an ER charge pipe will help a little with this?

Keep the RPM at 3k your issue is solved.

[otay]

Originally Posted by hollandog

Keep the RPM at 3k your issue is solved.

Hard to do that when you're at a stop sign.

[Billfitz]

Originally Posted by otay

Hard to do that when you're at a stop sign.

It matters not unless you drive like Don Garlits. My Bimmer at it's worst is better than any of the other cars around me.

[hollandog]

Originally Posted by otay

Hard to do that when you're at a stop sign.

I never had lag in Sport+ when launching from a stop.

[insanecoder]

Noticed this in my testdrive when I floored it in sport mode.. figured it was turbo lag
Are you guys saying the throttle even in Sport mode is programmed to ramp up gradually to pedaled level?

[bones]

you just have to be comfortable being a little deeper in the gas pedal. or stay in sport+ throttle mode and sport transmission mode.

do you get it in manual 1st in sport mode?

[ashpal19]

Yes, I too notice this lag in comfort mode. Switch to sport or sport+. I also try manual on comfort mode.

But recollecting, I also had the lag in my 335i, in non sport mode.

[Dan203]

Sport+ is just Sport with traction control disabled right?

FYI: I drove my 135i for a few minutes today (haven't sold it yet) and I really miss the stick. It's not as fast as the 340i but the feel of a manual and knowing exactly when it's going to pull or shift is just better. Should have got the manual in the 340i. Oh well, live and learn I guess. Probably not getting another one for another 8 years so I'm sure I'll get use to the auto eventually.

[VCuomo]

Originally Posted by roundel335

Very strange, indeed. My 2013 335i with 8AT has no "throttle lag", especially in Sport mode. ...

My 2012 F30 335i with 8AT sure does, same as what the OP has described. It only happens occasionally, but it's sure noticeable when it does.

[VCuomo]

Originally Posted by eluded

I don't really notice lag especially in sport mode. But I have a manual transmission. I know the automatics faster and what not but it has no soul.

[RoundelM3]

Originally Posted by VCuomo

My 2012 F30 335i with 8AT sure does, same as what the OP has described. It only happens occasionally, but it's sure noticeable when it does.

Maybe mine doesn't because I have the MPPK installed?

[chiefneil]

IMHO BMW throttle tip-in has been quirky and unnatural since they switched to throttle-by-wire with the E46. Going from my E36 to my E46, there was a noticeable lag on tip-in. Unless you were used to it, you'd hit the gas like normal, there'd be a pause, then a jerk as the car jumped forward because by the time the throttle sensor caught up you were a full second into initial gas pedal travel. With the old cable gas pedals, you get gas the instant you start pressing so that first second is actually a linear buildup as the pedal moves from zero to 1s, rather than just starting at 1s.

It's improved significantly in the F30, but still there to a small degree IMHO. My solution is simply to ease into the throttle initially, slower than I would with my old E36. It's just that initial .25 to .5s of tip-in where I ease in slowly, then once the electronics have caught up and the car starts rolling you can proceed as normal. Kind of like working a twitchy clutch with short engagement zone, you just move a little more slowly at the engagement point.

The other thing that might be happening is the car starting in 2nd gear if you're in comfort mode. You hit the throttle aggressively enough when starting off that it decides to downshift, so you get a pause then a jerk as the car suddenly takes off. You can probably eliminate this as a possibility by manually starting in 1st or sport mode.

[Billfitz]

Originally Posted by chiefneil

IMHO BMW throttle tip-in has been quirky and unnatural since they switched to throttle-by-wire with the E46.

Lag isn't caused by electronics. When you hit 'submit reply' consider how long it takes your post to make it's way to the forum server, get archived, and then make its way back to your computer and appear on your screen. The distance from your gas pedal sensor to the throttle servo is considerably shorter. Lag may exist, but it's not due to the elimination of a mechanical linkage.

[Dan203]

Exactly. The lag over a closed network like that is probably less then 1ms. Since this problem changes depending on which mode you have the car in, or whether you have the MPPK installed, it appears to be programming. Not sure if it's intentional or not, but I suspect it's probably intentional and meant to save a few MPG for regulation purposes.