Hesitation on Acceleration

sharkymcpeterson · 08-05-2022, 06:04 AM

Quote:

Originally Posted by gschlact2

Quote:

Originally Posted by sharkymcpeterson

I've been told the issue with initial hesitation is something called turbo lag. I cannot confirm or deny the accuracy of that information.

I can confirm that every current gen x5 that I've driven has a slight delay a good percentage of the time between when you floor the pedal and when the vehicle responds.

Not every time, but a lot of the time. I think it depends on what gear you're in and how fast you're going.

Sometimes, pre xlr, I'd floor it and the car would immediately lunge forward. Other times it waited a second or two. I prefer lunging.

I can also tell you that race chip XLR helps immensely with the lag in acceleration one experiences after flooring the vehicle.

Hopefully that info is helpful. Good luck!!

We all know the b58'is detuned to about 280hp in the x5 45e. Did you or anyone else know why the RaceChip doesn't yield the same b58 ice result for the 45e as the 40i b58? If the 40i is 340hp+ RaceChip addition, why isn't the 45e getting up to the same 416hp from the ice alone? Instead the 45e get 57hp/76ft-lb and doesn't get the regular b58's 76hp/85 ft-lb.

I honestly think the 40i has to be 380hp. There is no freaking way that car is 335hp from the factory. But anyways, an argument for another day.

gschlact2 · 08-05-2022, 07:23 AM

I’m not sure if my previous post was clear. For those wanting the RC tune and not a long term keeper of the vehicle, they would want the same 40i untuned+RaceChip 416hp ice total results, not just its larger jump.

What is the redline difference? Most of the detuning I assume came from lower boost?

sharkymcpeterson · 08-05-2022, 11:11 AM

Quote:

Originally Posted by gschlact2

I'm not sure if my previous post was clear. For those wanting the RC tune and not a long term keeper of the vehicle, they would want the same 40i untuned+RaceChip 416hp ice total results, not just its larger jump.

What is the redline difference? Most of the detuning I assume came from lower boost?

I agree, adding the RC GTS black and the XLR make a noticeable difference. Much more fun to drive, way more responsive and definitely pulls harder between the two RC plug ins.

jad03060 · 08-05-2022, 05:21 PM

Peak HP band is lower on the 45e with a lower redline, and the final drive ratio is taller by a fair percent than the 40i.

MJBradley1967 · 08-05-2022, 06:12 PM

A shame they didn't just put the same engine setup in the X5 xDrive40i that comes in the X3M.

BobsM3Coupe · 08-05-2022, 06:15 PM

Quote:

Originally Posted by MJBradley1967

A shame they didn't just put the same engine setup in the X5 xDrive40i that comes in the X3M.

You mean the X3 M40i?

MJBradley1967 · 08-05-2022, 07:47 PM

Quote:

Originally Posted by BobsM3Coupe

You mean the X3 M40i?

Nope. X3M (Competition?). I priced one to build when I was shopping back in May.

382hp vs 473hp. Either one is more powerful than the engine in my X5 40i

sharkymcpeterson · 08-06-2022, 07:47 PM

Quote:

Originally Posted by MJBradley1967

Quote:

Originally Posted by BobsM3Coupe

You mean the X3 M40i?

Nope. X3M (Competition?). I priced one to build when I was shopping back in May.

382hp vs 473hp. Either one is more powerful than the engine in my X5 40i

That's true but the 40i is fast for what it is. 0-60 in under 5 seconds is moving for a boat like the x5. With a $700 chip you can get hp over 400. That in-line 6 is strong.

MJBradley1967 · 08-06-2022, 07:52 PM

Quote:

Originally Posted by sharkymcpeterson

That's true but the 40i is fast for what it is. 0-60 in under 5 seconds is moving for a boat like the x5. With a $700 chip you can get hp over 400. That in-line 6 is strong.

Is there not more to the higher OEM HP V6's than programming?

I'm pretty sure they all 3L, but beyond that I just don't know.

jontron · 08-06-2022, 09:37 PM

Been noticing a delay in response on my 22 M50i at certain speeds on the highway over the last week. This is definitely new as the car didn't have this lag when I drove it home in February.

I was driving my girlfriend crazy on our long highway commute today because I would try to accelerate, the car wouldn't respond immediately, then would suddenly take off because I had pressed the gas more than I probably needed to - not exactly a smooth ride.

It's been pretty hot here, in the 90s daily. I also updated the software like a week or two ago. Not sure if any of this is related to the OP but I was recalling seeing this title on my drive today where I had a noticeable lag. Was thinking of bringing it in for service. 🤷🏻*♂️

jad03060 · 08-06-2022, 09:53 PM

The hotter it is, the higher you need your octane to prevent the computer retarding the timing to help prevent knocking.

jontron · 08-06-2022, 09:57 PM

Quote:

Originally Posted by jad03060

The hotter it is, the higher you need your octane to prevent the computer retarding the timing to help prevent knocking.

Yeah? I always use premium 93.

Do you recommend using an additive during hot summer months?

jad03060 · 08-06-2022, 10:24 PM

Quote:

Originally Posted by jontron

Yeah? I always use premium 93.

Do you recommend using an additive during hot summer months?

Some use like 89 octane, but 93 should perform well without any issues, so it may be something else.

eelnoraa · 08-07-2022, 02:54 AM

Quote:

Originally Posted by MJBradley1967

Is there not more to the higher OEM HP V6's than programming?

I'm pretty sure they all 3L, but beyond that I just don't know.

X3M's engine is S58. All 40i engines are B58. S series has always been an M division engine. Lots of differences and optimizations. No just software turning.

BTW, they are Inline6, a BWM signature engine configuration. Not V6. I am not sure BMW has a V6 for the last 25 years.

Beemertj · 08-08-2022, 07:11 PM

Throttle Body Adaptation--- Reset

I wonder if this works on the X5 too. Worked on my old F10.

gschlact2 · 08-08-2022, 10:22 PM

Quote:

Originally Posted by jontron

Been noticing a delay in response on my 22 M50i at certain speeds on the highway over the last week. This is definitely new as the car didn't have this lag when I drove it home in February.

I was driving my girlfriend crazy on our long highway commute today because I would try to accelerate, the car wouldn't respond immediately, then would suddenly take off because I had pressed the gas more than I probably needed to - not exactly a smooth ride.

It's been pretty hot here, in the 90s daily. I also updated the software like a week or two ago. Not sure if any of this is related to the OP but I was recalling seeing this title on my drive today where I had a noticeable lag. Was thinking of bringing it in for service. 🤷🏻*♂️

Try opening and closing the fuel cap to equalize the pressure on the hot days. Fwiw.

gsanto · 08-09-2022, 11:01 AM

Well I finally was able to fill up from empty with 93 octane over the weekend and it is no where near as noticeable. As mentioned, it has been very hot here in DC (as in most of the country).

So I am hoping that you are right in suggesting it was the combination of heat and octane. I very much appreciate the vanus suggestion as it sounds like that could rear its head with this engine over time.

UGADawgFan · 06-12-2023, 09:40 PM

Quote:

Originally Posted by gsanto

Running in comfort mode. I need to see if it occurs in the other modes as well. The issue isn't a 'lag' like turbo lag (which my 2010 550 had in spades) it is a feeling of tiny misfiring from low speed as I speed up to 30-40mph. I do think it could be the octane - at least I hope it is that.

I've never done any mods to any of my BMWs. Might think about that.

BTW, Just purchased an X7 for the wife...runs great. Bit slower given the extra weight but she loves it.

Reviving an old thread...I purchased an X5 a month ago with 60k miles and am having the same exact issue. It's a feeling of a slight misfire from 0 about 30 mph when the engine is at full operating temp. I've been using only 93 octane. Did you ever figure out a resolution? I replaced the spark plugs and coils and that didn't seem to help at all.

Alleygator2142 · 03-29-2024, 11:07 AM

Quote:

Originally Posted by UGADawgFan

Reviving an old thread...I purchased an X5 a month ago with 60k miles and am having the same exact issue. It's a feeling of a slight misfire from 0 about 30 mph when the engine is at full operating temp. I've been using only 93 octane. Did you ever figure out a resolution? I replaced the spark plugs and coils and that didn't seem to help at all.

I've got a 2018 F15 with only 33K miles and it seems to have the same problem. Runs ok when engine is cold but once engine hits operating temperature feel the engine misfiring when accelerating. If acceleration is not hard it can go smoothly (yet very tamely), but if I push it even a little bit it feels like misfiring/bucking in the lower gears/revs.

Initial feel was tires are not spinning synchronously but now I am at a loss.Pretty pissed with BMW, this is defi not the ultimate driving experience. Any advice?

UGADawgFan · 03-29-2024, 06:30 PM

Quote:

Originally Posted by Alleygator2142

I've got a 2018 F15 with only 33K miles and it seems to have the same problem. Runs ok when engine is cold but once engine hits operating temperature feel the engine misfiring when accelerating. If acceleration is not hard it can go smoothly (yet very tamely), but if I push it even a little bit it feels like misfiring/bucking in the lower gears/revs.

Initial feel was tires are not spinning synchronously but now I am at a loss.Pretty pissed with BMW, this is defi not the ultimate driving experience. Any advice?

is yours AWD? If so, it could be transfer case. That's what it turned out to be for me...evidently the xdrive system is very sensitive to incorrect tire sizes or unevenly worn tires and it can lead to transfer case failure.

Thankfully mine was under warranty and replaced, but it would have been a $6K bill without the warranty.

Once it was replaced, it's running as smooth as silk.

08-05-2022, 07:23 AM	#24
gschlact2 Private First Class 44 Rep 182 Posts Drives: X5 45e Join Date: Jul 2022 Location: Chicago area iTrader: (0)	I’m not sure if my previous post was clear. For those wanting the RC tune and not a long term keeper of the vehicle, they would want the same 40i untuned+RaceChip 416hp ice total results, not just its larger jump. What is the redline difference? Most of the detuning I assume came from lower boost?
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08-05-2022, 05:21 PM	#26
jad03060 Major General 3245 Rep 6,948 Posts Drives: X5 45e Join Date: Aug 2018 Location: NH iTrader: (0)	Peak HP band is lower on the 45e with a lower redline, and the final drive ratio is taller by a fair percent than the 40i.
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08-05-2022, 06:12 PM	#27
MJBradley1967 Lieutenant 198 Rep 493 Posts Drives: 2022 BMW X5 xDrive 40i Join Date: May 2022 Location: Far North Chicagoland Area iTrader: (0)	A shame they didn't just put the same engine setup in the X5 xDrive40i that comes in the X3M. __________________ 2022 X5 xDrive40i Black/Black/Black
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08-06-2022, 09:37 PM	#32
jontron Private 64 Rep 81 Posts Drives: 2022 BMW X5 M50i Join Date: Dec 2021 Location: Denver, CO iTrader: (0)	Been noticing a delay in response on my 22 M50i at certain speeds on the highway over the last week. This is definitely new as the car didn't have this lag when I drove it home in February. I was driving my girlfriend crazy on our long highway commute today because I would try to accelerate, the car wouldn't respond immediately, then would suddenly take off because I had pressed the gas more than I probably needed to - not exactly a smooth ride. It's been pretty hot here, in the 90s daily. I also updated the software like a week or two ago. Not sure if any of this is related to the OP but I was recalling seeing this title on my drive today where I had a noticeable lag. Was thinking of bringing it in for service. 🤷🏻*♂️
	Appreciate 0 Quote

08-06-2022, 09:53 PM	#33
jad03060 Major General 3245 Rep 6,948 Posts Drives: X5 45e Join Date: Aug 2018 Location: NH iTrader: (0)	The hotter it is, the higher you need your octane to prevent the computer retarding the timing to help prevent knocking.
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08-08-2022, 07:11 PM	#37
Beemertj Private 19 Rep 62 Posts Drives: 13' 535xi f10, 20' X5 i40 Join Date: Sep 2018 Location: Idaho iTrader: (0)	Throttle Body Adaptation--- Reset I wonder if this works on the X5 too. Worked on my old F10. __________________ 528I 1998 SOLD 528Xi 2009 SOLD 535Xi 2013 ----- Daily driver 2020 X5 G05 i40 -- Family car
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08-09-2022, 11:01 AM	#39
gsanto Private First Class 40 Rep 128 Posts Drives: 2019 X5, 2011 550; 2004 X5 Join Date: Nov 2015 Location: Washington DC Area iTrader: (0)	Well I finally was able to fill up from empty with 93 octane over the weekend and it is no where near as noticeable. As mentioned, it has been very hot here in DC (as in most of the country). So I am hoping that you are right in suggesting it was the combination of heat and octane. I very much appreciate the vanus suggestion as it sounds like that could rear its head with this engine over time.
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