N57 light hesitation

tonksie93 · 10-14-2022, 01:45 AM

On very partial throttle i have hesitations. As soon as i give it more gas the hesitation clears and under full throttle it works perfectly. I am going to first change my fuel filter in case it is clogging.

I have a DPF delete, EGR delete, water injection, large intercooler and a custom remap. FYI

Any ideas would be greatly appreciated.

Thank you

Watsey · 10-14-2022, 02:44 AM

Depends what you mean by hesitation, and at what rpm. Misfire ? Cough ? Delay and then smooth power ?

It could simply be turbo lag.

Unlikely to be a badly blocked fuel filter - lack of throughput would get worse as the fuelling increased with rpm and load.

Is the EGR fully coded-out in your remap ?

tonksie93 · 10-14-2022, 03:40 AM

Yes EGR has been fully coded out and the vehicle has been running fine without it for around 2 years.

It's like a misfire and bucks very slightly, this is with very minimal throttle so it's not very noticeable. As soon as i put on more throttle the engine runs fine. I will check for any DTC's later.

Watsey · 10-14-2022, 08:34 AM

Are you sure it's not transmission lash ? If you lift off the throttle, and then re-apply, does it feel the same as your perceived engine hesitation ?

Andy07841 · 10-15-2022, 01:55 AM

What's the mileage on your car?
Has the gearbox had a service done on it?

tonksie93 · 10-17-2022, 04:39 AM

Cars milage is 160k miles. There are no DTC's. It happened more noticeably yesterday i was at about 1/3 throttle and when accelerating it's like the engine "paused" for a second and then began accelerating again.

I have not done a gearbox service in the time i have owned the vehicle.

Watsey · 10-17-2022, 06:22 AM

Have you checked/cleaned the Mass Airflow Sensor and the Mass Air Pressure sensors ?

tonksie93 · 10-20-2022, 09:07 AM

I have not no, will do this first.

Watsey · 10-20-2022, 09:48 AM

I think it's unlikely to be the root of the problem but it's always eliminating the simple things first.

tonksie93 · 10-28-2022, 05:12 AM

The car seemed to rectify itself. Thinking maybe it was bad fuel.

anielsen71 · 10-28-2022, 05:33 AM

Quote:

Originally Posted by Watsey

Are you sure it's not transmission lash ? If you lift off the throttle, and then re-apply, does it feel the same as your perceived engine hesitation ?

Was about to sat the same.
Or guibo…or engine mounts.
I have a little bit of the same and will get above checked next time it's in the shop

10-14-2022, 01:45 AM	#1
tonksie93 Private First Class 7 Rep 108 Posts Drives: BMW F30 330d M Sport Join Date: Aug 2017 Location: United Kingdom iTrader: (0)	N57 light hesitation On very partial throttle i have hesitations. As soon as i give it more gas the hesitation clears and under full throttle it works perfectly. I am going to first change my fuel filter in case it is clogging. I have a DPF delete, EGR delete, water injection, large intercooler and a custom remap. FYI Any ideas would be greatly appreciated. Thank you
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10-14-2022, 02:44 AM	#2
Watsey Major General 6443 Rep 8,510 Posts Drives: F31 330D sDrive M Sport Join Date: Jun 2015 Location: On sabbatical. iTrader: (1)	Depends what you mean by hesitation, and at what rpm. Misfire ? Cough ? Delay and then smooth power ? It could simply be turbo lag. Unlikely to be a badly blocked fuel filter - lack of throughput would get worse as the fuelling increased with rpm and load. Is the EGR fully coded-out in your remap ? __________________ Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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10-14-2022, 03:40 AM	#3
tonksie93 Private First Class 7 Rep 108 Posts Drives: BMW F30 330d M Sport Join Date: Aug 2017 Location: United Kingdom iTrader: (0)	Yes EGR has been fully coded out and the vehicle has been running fine without it for around 2 years. It's like a misfire and bucks very slightly, this is with very minimal throttle so it's not very noticeable. As soon as i put on more throttle the engine runs fine. I will check for any DTC's later.
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10-14-2022, 08:34 AM	#4
Watsey Major General 6443 Rep 8,510 Posts Drives: F31 330D sDrive M Sport Join Date: Jun 2015 Location: On sabbatical. iTrader: (1)	Are you sure it's not transmission lash ? If you lift off the throttle, and then re-apply, does it feel the same as your perceived engine hesitation ? __________________ Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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10-15-2022, 01:55 AM	#5
Andy07841 Private 23 Rep 55 Posts Drives: BMW 330d 2016 Join Date: Jul 2020 Location: Cheshire iTrader: (0)	What's the mileage on your car? Has the gearbox had a service done on it?
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10-17-2022, 04:39 AM	#6
tonksie93 Private First Class 7 Rep 108 Posts Drives: BMW F30 330d M Sport Join Date: Aug 2017 Location: United Kingdom iTrader: (0)	Cars milage is 160k miles. There are no DTC's. It happened more noticeably yesterday i was at about 1/3 throttle and when accelerating it's like the engine "paused" for a second and then began accelerating again. I have not done a gearbox service in the time i have owned the vehicle.
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10-17-2022, 06:22 AM	#7
Watsey Major General 6443 Rep 8,510 Posts Drives: F31 330D sDrive M Sport Join Date: Jun 2015 Location: On sabbatical. iTrader: (1)	Have you checked/cleaned the Mass Airflow Sensor and the Mass Air Pressure sensors ? __________________ Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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10-20-2022, 09:07 AM	#8
tonksie93 Private First Class 7 Rep 108 Posts Drives: BMW F30 330d M Sport Join Date: Aug 2017 Location: United Kingdom iTrader: (0)	I have not no, will do this first.
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10-20-2022, 09:48 AM	#9
Watsey Major General 6443 Rep 8,510 Posts Drives: F31 330D sDrive M Sport Join Date: Jun 2015 Location: On sabbatical. iTrader: (1)	I think it's unlikely to be the root of the problem but it's always eliminating the simple things first. __________________ Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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10-28-2022, 05:12 AM	#10
tonksie93 Private First Class 7 Rep 108 Posts Drives: BMW F30 330d M Sport Join Date: Aug 2017 Location: United Kingdom iTrader: (0)	The car seemed to rectify itself. Thinking maybe it was bad fuel.
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