[Rocketman123]

I have a 2023 M340i X-drive. Sometime when I'm at a stop sign and I floor it, the engine literally does nothing for a couple seconds. Most of the time it's fine but I can't figure out why it does this occasionally. Is that normal?

[sikotic]

Ive had something similar happen recently in my 2020. It's only happened 3 times, but when taking off from a light it will lag, lag, lag and then boosts very quickly. Not sure if its the same thing you're experiencing or not

[ShadowedAngles]

I had a similar issue with my 330. It wasn't at a stop sign but when I was slowing down at a stop but then the light went green and I give it lots of gas, it takes like a second to register.

Were you in Comfort or Sport Plus?

[G30M]

if you floor it, it's not normal for a couple of seconds - it does take around just under a second or so before it moves, maybe it's the second that felt like 2.

my Toyota NA V6 van, yeah baby that thing will fly when you gas it. but not the M340i in comparison. my 5 series is much worse.

if you didn't floor it, yup it's normal!

[G30M]

just realised you have a 2023, it has this mild hybrid thing. it should be more responsive than my pure ICE?

[G30M]

you can set it to be very responsive, but i don't know how. my car used to be like as you described when i babied it, then after run in i drove it like a maniac for a couple of weeks and the car's throttle response (and exhaust noise!) is much much improved. but still not as good as my 2007 Toyota NA van.

try "reset throttle adaptation" procedure and then drive around like a maniac and see if it saves your behaviour.

[Mark Venture]

Could be that this is "normal" for the new mild hybrids. I had a 2020 M340i, and there was no lag sensation really at all. (no noticeable throttle lag and no noticeable turbo spin up lag). In fact that was one of the things that has always kept me with BMW and not Audi. BMW was able to dial out lag compared to various Audis I tried, S5 coupe, S4 sedan...even a mighty RS5 Sportback I test drove.
When I test drove a 2024 M440 GC though (which has the mild hybrid setup) I did feel a bit of lag even though I was in Sport. Given a history of never feeling lag in B58 engine BMWs I've had, I figured it must have been something in the particular tester I was in, or maybe the conditions that day.
Now I am wondering if it was not a one-off after all, and some lag is the norm now with the new engine setup.

[billnchristy]

Not normal at all. Other than the occasional wrong gear for the situation requiring a downshift or 2 or 3, there is no discernable lag in my m440i gc.

[Mark Venture]

Originally Posted by billnchristy

Not normal at all. Other than the occasional wrong gear for the situation requiring a downshift or 2 or 3, there is no discernable lag in my m440i gc.

Having an M440i GC on the assembly line, I am happy to hear that. But does yours have the mild hybrid? Yours is a 2022.

[billnchristy]

Yes all the GCs are MH from this era.

[Terman]

Sounds similar to the issue posted earlier in this thread:

https://g20.bimmerpost.com/forums/sh....php?t=1915462

[G30M]

throttle response is computer fuzzy logic.

you need to program the throttle response computer for instant response

[Rocketman123]

Thanks for all the feedback guys.

I'm not freaking out (yet) because it doesn't happen too often - maybe once every couple of months. I need to keep track from now on to make sure it doesn't get worse.

Normally there's almost no lag. But it is troubling when it happens. It happened yesterday when I posted this but this morning it took off like a rocket. I would say the first time it happened I had a few thousand miles, now I have about 11,000. I'm pretty sure I was in Sport mode both times so it's not the stupid A/S thing. It's also not an issue with the engine not being warmed up. Yesterday it happened after about 20 minutes of driving.

Yes it has the hybrid.

Software might be an issue, although it's gone through at least 1 or 2 updates since I got the car.

Also happened when I had pure 91 octane and currently added a couple gallons of E85, so I don't think I can blame that.

I does sound similar to the other thread that Terman posted above (thanks for that!). For me, it's always been either from a hard stop, or a slight roll. Always when I want to gun it.

It's similar to what sikotic said - lag, lag, then it just kicks in (maybe about 2 seconds lag)..

I'm not sure how to do the "reset throttle adaptation"...

I have almost no confidence that the dealer will do anything about it, unless it gets really bad.

I pretty much floor it every day (I confess) so I'll keep you posted when it happens again.

Thanks!

[Frunzik340]

Same thing happens to me lag from the start of launch then boosts quickly

[ShadowedAngles]

Originally Posted by g21

throttle response is computer fuzzy logic.

you need to program the throttle response computer for instant response

Can you explain how to program the throttle response computer for instant response?

[G30M]

reset throttle adaptation and drive like a mad man for a few weeks

[totalone]

Originally Posted by g21

reset throttle adaptation and drive like a mad man for a few weeks

How do you do that?

[jpowers36]

I’ve experienced this a few times as well in the 2 years I’ve owned it. 2020 MY.

Pretty sure it has happened before and after my stage 2 tune. It’s like nothing, nothing, then bam here comes the boost. It hasn’t happened enough to where I’m able to identify what conditions are causing it. I do recall it’s been at a stop when making a turn.

No CEL, no other warnings. I thought it may be due to the mileage on my car but seeing as others have had similar issues with low mileage, I don’t think that’s it.

[ShadowedAngles]

Originally Posted by jpowers36

I’ve experienced this a few times as well in the 2 years I’ve owned it. 2020 MY.

Pretty sure it has happened before and after my stage 2 tune. It’s like nothing, nothing, then bam here comes the boost. It hasn’t happened enough to where I’m able to identify what conditions are causing it. I do recall it’s been at a stop when making a turn.

No CEL, no other warnings. I thought it may be due to the mileage on my car but seeing as others have had similar issues with low mileage, I don’t think that’s it.

What's your mileage? I first experienced it around 24k-25k.

[sikotic]

Ok yeah it sounds like a couple of us are experiencing the same thing. Service advisor basically told me that it needs to get worse, or become more frequent for them to really figure it out.

I have just under 28k miles for reference. It must have started after 25 or 26k. Happened only about 3 times or so, but its been a couple weeks now

[Rocketman123]

Well at least I'm not alone :-)

It sounds like some of us would appreciate an explanation on how to reset throttle adaptation.

[jpowers36]

102k miles