What's your idle speed? N47/8hp

Apples12 · 03-19-2019, 04:22 AM

Hi all

Trying to pinpoint cause of my lumpy idle on my f10 and I think it's because the idle is a little too low.

It currently sits just below 800rpm, perhaps around 770ish and will fluctuate a tiny bit.

Would be interested to see what other folks' idle sits at so I can compare

Many thanks

328iX · 03-21-2019, 11:14 AM

That sounds correct, it being lumpy isn't normal but idle speed should be low

Enabled · 03-21-2019, 04:16 PM

780 rpm +- 2

fantanas · 03-22-2019, 10:45 AM

A bit below 800rpm sounds about right. Mine starts around there and after it warms up and a bit of driving it drops a bit closer to 650rpm.

What do you mean by lumpy? Does the car sound like it struggles? It could be a maf issue. Or maybe it is cold outside?

FaRKle! · 03-22-2019, 12:01 PM

My idle is 730rpm fully warmed up.

Apples12 · 03-22-2019, 08:18 PM

Hmm

I'll try and capture a video in the morning

Once it's in drive the rpm needle will move up and down slightly and I can feel a vibration in the car which corresponds to the needle going up and down, not massively, maybe almost imperceivable but it's definitely there

Car is at 125k miles and has recently had its EGR cooler replaced

Enabled · 03-22-2019, 08:27 PM

What month and year of production is your F10? Which engine? N47 or B47?
i-level of whole car (software update level)?

Apples12 · 03-23-2019, 02:22 AM

Quote:

Originally Posted by Enabled

What month and year of production is your F10? Which engine? N47 or B47?
i-level of whole car (software update level)?

Build date is August 2013, N47D20C engine, July 2016 istep.... h

Eville Rich · 04-03-2019, 09:52 PM

I'm still in the "getting to know you" phase with my 2017 328d and have been watching everything I can as I get familiar with the car. My idle speed is normally about 750 rpm when things are warmed up.

I recently did a trip to Colorado (from Wisconsin) and noticed that my idle speed in Colorado was about 850 rpm when fully warmed up. Returned to Wisconsin and the idle is at 750. My guess is it's an altitude thing and an adjustment for less dense air.

Use as needed.

Eville Rich

KayNix · 04-09-2019, 01:18 AM

800rpm

03-19-2019, 04:22 AM	#1
Apples12 First Lieutenant 108 Rep 364 Posts Drives: 520D LCI auto Join Date: Feb 2016 Location: Uk iTrader: (0)	What's your idle speed? N47/8hp Hi all Trying to pinpoint cause of my lumpy idle on my f10 and I think it's because the idle is a little too low. It currently sits just below 800rpm, perhaps around 770ish and will fluctuate a tiny bit. Would be interested to see what other folks' idle sits at so I can compare Many thanks
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03-21-2019, 11:14 AM	#2
328iX David 786 Rep 2,010 Posts Drives: 2015 328iX F31 Join Date: Nov 2018 Location: Temecula, CA iTrader: (0)	That sounds correct, it being lumpy isn't normal but idle speed should be low Attached Images Last edited by 328iX; 03-21-2019 at 01:58 PM..
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03-21-2019, 04:16 PM	#3
Enabled Lieutenant Colonel 1407 Rep 1,800 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	780 rpm +- 2 __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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03-22-2019, 10:45 AM	#4
fantanas First Lieutenant 112 Rep 332 Posts Drives: F33 435d Join Date: Mar 2019 Location: Athens iTrader: (0)	A bit below 800rpm sounds about right. Mine starts around there and after it warms up and a bit of driving it drops a bit closer to 650rpm. What do you mean by lumpy? Does the car sound like it struggles? It could be a maf issue. Or maybe it is cold outside?
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03-22-2019, 12:01 PM	#5
FaRKle! Brigadier General 4016 Rep 3,539 Posts Drives: 328d Wagon, M2 Comp, i4 eD35 Join Date: Sep 2016 Location: Bay Area, CA iTrader: (4) Garage List 2023 BMW i4 eDrive 35 [0.00] 2017 BMW 328dx Wagon [0.00] 2021 BMW M2 Competi ... [0.00]	My idle is 730rpm fully warmed up.
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03-22-2019, 08:18 PM	#6
Apples12 First Lieutenant 108 Rep 364 Posts Drives: 520D LCI auto Join Date: Feb 2016 Location: Uk iTrader: (0)	Hmm I'll try and capture a video in the morning Once it's in drive the rpm needle will move up and down slightly and I can feel a vibration in the car which corresponds to the needle going up and down, not massively, maybe almost imperceivable but it's definitely there Car is at 125k miles and has recently had its EGR cooler replaced
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03-22-2019, 08:27 PM	#7
Enabled Lieutenant Colonel 1407 Rep 1,800 Posts Drives: 328xd Wagon, M2 Competition Join Date: Jun 2018 Location: Houston iTrader: (0)	What month and year of production is your F10? Which engine? N47 or B47? i-level of whole car (software update level)? __________________ -2014 328d Wagon, 8HP. Self-tuned, 270hp/430ft-lbs. -2019 M2 Competition MT, Alpine White. Self-tuned 560hp -2016 Mini Cooper S, MT. Many plans. Others: -E36 328is. 2000 Z3 Roady. 2003 VW Jetta TDI Manual. Estoril Z3M Coupe.
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04-03-2019, 09:52 PM	#9
Eville Rich Registered 0 Rep 3 Posts Drives: 2017 328dx wagon Join Date: Mar 2019 Location: Wisconsin iTrader: (0)	I'm still in the "getting to know you" phase with my 2017 328d and have been watching everything I can as I get familiar with the car. My idle speed is normally about 750 rpm when things are warmed up. I recently did a trip to Colorado (from Wisconsin) and noticed that my idle speed in Colorado was about 850 rpm when fully warmed up. Returned to Wisconsin and the idle is at 750. My guess is it's an altitude thing and an adjustment for less dense air. Use as needed. Eville Rich
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04-09-2019, 01:18 AM	#10
KayNix New Member 2 Rep 6 Posts Drives: BMW 318d F31 2015 Join Date: Apr 2019 Location: Romania iTrader: (0)	800rpm
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