E90Post
 


The Tire Rack
 
BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > E90 320D poor fuel consumtion



Reply
 
Thread Tools Search this Thread
      11-22-2013, 11:58 AM   #1
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Question E90 320D poor fuel consumtion

Hi,


My car is an E90 320D which is in good condition. Had proper services at regular intervals, new tyres when needed etc. in the City my car used to do 41 MPG ( it is a 2006 E90) and on the motor way it used to do more than 48MPG. Now in the city my car is only doing 30MPG and sometimes my OBC shows this as 29MPG, pretty appalling! Not sure what is going on? my car is done 100,000 miles already, but I still expect this to give good consumption.

Could someone please help, what I need to check where things are gone wrong? and what I need to get fixed? etc...any help is greatly appreciated. Thanks.

Satish
Appreciate 0
      11-22-2013, 12:41 PM   #2
IanS100
Major General
IanS100's Avatar
England
135
Rep
5,050
Posts

Drives: 520d F10 LCI M Sport
Join Date: Nov 2011
Location: Southport UK

iTrader: (0)

First thing to check is that the thermostats are working correctly & that the engine is getting up to the correct temperature
Appreciate 0
      11-22-2013, 12:48 PM   #3
Digitalize
Photographer
Digitalize's Avatar
United Kingdom
407
Rep
2,635
Posts

Drives: 320D
Join Date: Jun 2013
Location: UK

iTrader: (0)

As said, thermostats would be my first port of call. Check it using the hidden menu in the OBC, a google will find you the instructions on how to use it.
Appreciate 0
      11-22-2013, 02:53 PM   #4
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

hello, thank you both for the informations..I will google and check how the thermostats are in my car...
Appreciate 0
      11-22-2013, 03:04 PM   #5
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Question

Quote:
Originally Posted by Digitalize View Post
As said, thermostats would be my first port of call. Check it using the hidden menu in the OBC, a google will find you the instructions on how to use it.
is this the below I need to check in OBC?

07.00 KTMP-MOM
(Kühlmittel Temperatur im Moment) Current Coolant temperature
Appreciate 0
      11-22-2013, 03:23 PM   #6
Digitalize
Photographer
Digitalize's Avatar
United Kingdom
407
Rep
2,635
Posts

Drives: 320D
Join Date: Jun 2013
Location: UK

iTrader: (0)

Yes, should sit 88c when warm. Will obviously take a while to get warm. Should be there even with AC on, shouldn't dip when on motorways/coasting etc.
Appreciate 0
      11-22-2013, 04:31 PM   #7
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Quote:
Originally Posted by Digitalize View Post
Yes, should sit 88c when warm. Will obviously take a while to get warm. Should be there even with AC on, shouldn't dip when on motorways/coasting etc.
Thank you will check and update.
Appreciate 0
      11-22-2013, 04:34 PM   #8
Digitalize
Photographer
Digitalize's Avatar
United Kingdom
407
Rep
2,635
Posts

Drives: 320D
Join Date: Jun 2013
Location: UK

iTrader: (0)

88 is the minimum, if it's around 80, it's your EGR thermostat, if it's struggling to hit 70, it's probably both.
Appreciate 0
      11-22-2013, 05:47 PM   #9
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Quote:
Originally Posted by Digitalize View Post
88 is the minimum, if it's around 80, it's your EGR thermostat, if it's struggling to hit 70, it's probably both.
sorry one is EGR thermostat, what is the other one? thx
Appreciate 0
      11-22-2013, 07:39 PM   #10
Jase 320d
Wheelbarrow Edition
Jase 320d's Avatar
Scotland
63
Rep
1,608
Posts

Drives: Arctic 320d
Join Date: Sep 2013
Location: Dumfries and Galloway

iTrader: (1)

Quote:
Originally Posted by Digitalize View Post
88 is the minimum, if it's around 80, it's your EGR thermostat, if it's struggling to hit 70, it's probably both.

My m47 320d sat at 80 degree's

Changed egr thermostat and it still sits at 80
Appreciate 0
      11-23-2013, 05:59 AM   #11
Dan-danGT
Captain
Dan-danGT's Avatar
United Kingdom
35
Rep
650
Posts

Drives: E90 330d M-Sport
Join Date: Dec 2012
Location: Nottinghamshire

iTrader: (0)

My 330d use to sit at 80 I changed egr stat which made no difference or minimal. Changed main stat which brought the temp to 90c

How ever if I lift off the throttle and coast it stilll drops 3-4c which I think is my auto gearbox stat. But its been fine since so I left it.
Appreciate 0
      11-23-2013, 07:30 AM   #12
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Hi checked the temp its only showing 64C after half hour continuous driving...
Appreciate 0
      11-23-2013, 07:31 AM   #13
kowalski
Enlisted Member
1
Rep
43
Posts

Drives: BMW E91 320D Auto (2006)
Join Date: Jan 2009
Location: Cyprus

iTrader: (0)

Quote:
Originally Posted by Dan-danGT View Post
My 330d use to sit at 80 I changed egr stat which made no difference or minimal. Changed main stat which brought the temp to 90c

How ever if I lift off the throttle and coast it stilll drops 3-4c which I think is my auto gearbox stat. But its been fine since so I left it.
what auto gearbox stat? Had both egr and main stat changed last year and the temperature drops to 84-86 when going downhill (normal is 89-92).
Appreciate 0
      11-23-2013, 07:59 AM   #14
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Quote:
Originally Posted by Digitalize View Post
88 is the minimum, if it's around 80, it's your EGR thermostat, if it's struggling to hit 70, it's probably both.
please find my pic with temp
Attached Images
 
Appreciate 0
      11-23-2013, 08:00 AM   #15
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

any ideas how much it may cost to replace both EGR and also main thermostats?
Appreciate 0
      11-23-2013, 08:02 AM   #16
Jase 320d
Wheelbarrow Edition
Jase 320d's Avatar
Scotland
63
Rep
1,608
Posts

Drives: Arctic 320d
Join Date: Sep 2013
Location: Dumfries and Galloway

iTrader: (1)

Egr stat is a simple diy!

It literally takes 5mins!


I also need the main stat done but looks a little trickier so will get it done at my next service

My temp sits at 80 so im only about 5mpg down (can wait for the time being)
Appreciate 0
      11-23-2013, 08:13 AM   #17
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Quote:
Originally Posted by Jase 320d View Post
Egr stat is a simple diy!

It literally takes 5mins!


I also need the main stat done but looks a little trickier so will get it done at my next service

My temp sits at 80 so im only about 5mpg down (can wait for the time being)
Thanks Jase..how much it costs if I were to get both done at a BMW specialist garage? I want to get this ASAP as I am only getting 29 MPG..I will be happy even if I get 35+
Appreciate 0
      11-23-2013, 09:20 AM   #18
Jase 320d
Wheelbarrow Edition
Jase 320d's Avatar
Scotland
63
Rep
1,608
Posts

Drives: Arctic 320d
Join Date: Sep 2013
Location: Dumfries and Galloway

iTrader: (1)

Both parts are around £70-£80 from bmw for both

I think the main stat is 2 hours labour. Hopefully they'll just charge 2 hours labour for both including coolant change


I think you'll be around the £200 mark
Appreciate 0
      11-23-2013, 10:15 AM   #19
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

Quote:
Originally Posted by Jase 320d View Post
Both parts are around £70-£80 from bmw for both

I think the main stat is 2 hours labour. Hopefully they'll just charge 2 hours labour for both including coolant change


I think you'll be around the £200 mark
Thank you
Appreciate 0
      11-23-2013, 12:27 PM   #20
Digitalize
Photographer
Digitalize's Avatar
United Kingdom
407
Rep
2,635
Posts

Drives: 320D
Join Date: Jun 2013
Location: UK

iTrader: (0)

Mine was struggling to hit 70, garage agreed to change the main thermostat, got it to 80 consistent, EGR got it to 88, coasting a mile downhill to my town drops it a little especially now but sits 88 lovely.

Will be both. About £200 I'd imagine for a specialist. They shouldn't really charge for the other it's so easy. Although my boost pipe was perished so had to get a new one of those too. Took it off for easier access.
Appreciate 0
      11-25-2013, 04:47 PM   #21
satish_141
Lieutenant
105
Rep
478
Posts

Drives: F30 320i
Join Date: Nov 2010
Location: Reading

iTrader: (0)

I checked with Munich MOTORS and the quote was £350 for egr and main stat and coolent change..looks like its a lot more than expected..I don't want to go there..any other good bmw specialists near reading anyone could suggest please?
Appreciate 0
      11-26-2013, 10:32 AM   #22
joncoyle87
Private
joncoyle87's Avatar
United Kingdom
43
Rep
55
Posts

Drives: X4 M40i
Join Date: Oct 2013
Location: Derby, UK

iTrader: (0)

A job like this wouldn't have to be a BMW specialist.
It's a pretty common fault for all cars so any decent garage should sort it for half the price they have quoted you
Appreciate 0
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 05:56 PM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST