Jump to content
terrymcg

F10 520d Hesitation

Recommended Posts

Hi Gents,

 

Not had my 520d for long, just wondered if it is just s standard thing the slow and hesitation pull away with this engine? I have done a gear box reset, but no real change to be honest. Is it something I need to live with or can software updates etc fix it?

 

Terry

Share this post


Link to post
Share on other sites

Turbo lag on pull away is a possibility. If it is a case of you press the accelerator and there is a slight hesitation before the car takes off then I suggest this is the cause. I find it quite prevalent if I am slowing down to a roundabout and then accelerating away. You do get used to it though. Is this a new car or new to you? If new it will have the B47 engine if new to you it could have either the B47 or the older N47 engine.

Share this post


Link to post
Share on other sites

It's down to big brother BMW manipulating throttle response to the extent that it can be ****** dangerous :wub:

 

I have an Auto B47 and have got used to knocking the gear lever to the left (M/S mode) at junctions and roundabouts, otherwise I go to accelerate and it does nothing. There have been quite a few occasions where I've gone to accelerate onto a roundabout only to change my mind and slam the brakes on because it's in comfort mode and hasn't moved off quick enough. It can't be Turbo lag because it responds ok when switched to Sport. I wouldn't be at all surprised if this is BMWs way of forcing us to be gentle with their engines, in a similar way they installed the clutch delay valve on e90 manual  gear box preventing us from dropping the clutch too fast. :angry:

Share this post


Link to post
Share on other sites
1 hour ago, IanS100 said:

I wouldn't be at all surprised if this is BMWs way of forcing us to be gentle with their engines, 

 

Otherwise known as being tuned for emissions.

 

In order to let owners pay next to nothing for road tax, the engines are strangled for power and performance to the point the car is not as, shall we say, friendly to drive as you expect.

Share this post


Link to post
Share on other sites
56 minutes ago, 535iAR said:

 

Otherwise known as being tuned for emissions.

 

In order to let owners pay next to nothing for road tax, the engines are strangled for power and performance to the point the car is not as, shall we say, friendly to drive as you expect.

 

... except that performance is fine when in sport mode, so the engine is perfectly capable of dragging the skin of a rice pudding provided you drive in sport mode. There's nothing wrong with state of tune, it is simply that the throttle response is soooo sloooow unless in sport. If you stick your foot down and wait it will go eventually, you just need plenty of notice to accelerate.

Share this post


Link to post
Share on other sites
4 hours ago, kingwear said:

Does it not pull away in 2nd in Comfort mode?

 OMG, where's my flak jacket and hard hat lol.

 

IMO it is solely down to mapping of the drive by wire throttle. Push the accelerator in comfort or eco mode and literally nothing happens for what seems like an eternity, and then the power comes in slowly, compare that to exactly the same thing with sport selected and the car takes off with respectable acceleration and without hesitation. 

Share this post


Link to post
Share on other sites

Yep sports mode for me as well till I hit proper A roads.

In Comfort or Eco mode it is just far to fluffy and hesitant out of junctions etc.

 

This may not be as obvious with the larger engines but my 520 is positively lethargic when leaving the first T junction of my daily commute when in Comfort mode.

 

I also coded and disabled auto stop start as well because the default operation is bloody stupid at roundabouts.

Utter madness to be going from the brake pedal to the accelerator and in that very instant the engine stops!

Edited by Alexak

Share this post


Link to post
Share on other sites

Hi. Why has this tread stopped over a year ago. Is there an official BMW solution to this problem?

I have taken my 2015 520d  Msport back several time and been told it is a characteristic of the car.  

Share this post


Link to post
Share on other sites
5 hours ago, Swinny said:

Hi. Why has this tread stopped over a year ago. Is there an official BMW solution to this problem?

I have taken my 2015 520d  Msport back several time and been told it is a characteristic of the car.  

 

Because the op, never ever came back to add to his or her one and only post made on this forum.

 

 

Share this post


Link to post
Share on other sites

Eco Porn mode is woefully slow: only to be used on motorways in 5th or 6th gear: 75-80mph cruise.

 

Comfort is for broken tarmac and smashed concrete drives down industrial estates.  Or when visiting the North.

 

Sport mode is the only viable option for all-round efficiency, pick-up and drivability.

 

I would add that, on the motorway, I see no MPG difference between the car cruising in Sport and then in Eco Porn.

 

Drive it like you stole it.  Except - it's an Efficient Dynamics.  :lol:

Share this post


Link to post
Share on other sites
1 hour ago, 535i Andrew said:

 

Because the op, never ever came back to add to his or her one and only post made on this forum.

 

 

 

Yes, that does annoy me a little when people come on, raise a query, then disappear after forum members have taken time to reply in order to assist.

Edited by nashdm2

Share this post


Link to post
Share on other sites

Hi. Thank you for the feedback. 

 

I have sorted mine now and drives like a dream. 

I have an aftermarket management system that takes away the delay and now it acts like my old E46 330d gearbox 

Not sure on mpg yet. Not had it on long enough. 

i am even thinking of keeping it. 

I will update then I have more data. 

Share this post


Link to post
Share on other sites
41 minutes ago, 535i Andrew said:

^2 more cylinders.......

 

:lol::rolleyes:... Or an extra turbo.... 

Edited by rickyclean

Share this post


Link to post
Share on other sites
1 minute ago, 535i Andrew said:

 

Nah, there is no substitution for cubic capacity when it comes to engine power increases! ;)

 

Show off!

Share this post


Link to post
Share on other sites
Just now, rickyclean said:

 

Show off!

 

Nah, it's just fact. My V8 was far better than my current blown 6 pot for give or take the same power output. Granted the 6 pot won't leak oil from its joints like the V8s do. :D

 

Cubes is what you want not bolt on go faster stuff.....it's more reliable, but not as fuel efficient which sadly is what governs today's engines,

Share this post


Link to post
Share on other sites

hehe I have matched the the gearbox settings not added any cylinders.

I have fitted a "pedal commander" unit that changes the way the power is put through the gearbox.

It feels like I have control of the power now not the car.

 

Share this post


Link to post
Share on other sites

Maybe a solution ?

2016 520D 30000kms

 

Got the hesitation about two months ago. Read up the various forums tried a few of the suggested easy fixes but no change.

I tried to book it into the dealer but being France in August first appointment was 22/8.

On Tuesday I set off for a 650 km journey and after 600kms the engine warning light came on. My dealer said best to have a diagnostic locally before driving home.

 

Nearest dealer said bring it now for a diagnostic, but we are fully booked. Result was blocked EGR valve. Happily the dealer checked and said "no problem, leave it here and we'll do it tomorrow. It is waranty with free courtesy car (2019 530D Luxury with 10kms !).

When I collected it, the ASM said this is not uncommon. Symptoms are hesitation, then engine light, then eventually major loss of power.

Car is fine now. I even got a good valet ...... I paid nothing.

BTW I had already had the EGR recall work done.

 

Edited by mpprh
Additional info

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×