[jinjur]

I dont know mate, all i will say is that the range has never ever showed a figure like that, always been circa 420 and that has always pretty much been on the money within about 30 miles.

The OBC display is cock as far as I am concerned.

But, for the record.....it went UP to 36.7 when we were driving so it must be better.

[gIzzE]

Originally Posted by jinjur

I dont know mate, all i will say is that the range has never ever showed a figure like that, always been circa 420 and that has always pretty much been on the money within about 30 miles.

The OBC display is cock as far as I am concerned.

But, for the record.....it went UP to 36.7 when we were driving so it must be better.

The OBC can't be that far out, it just measures the amount of fuel being used and the distance being travelled.
Do you reset it everytime you fill up?? And take a proper measurment at the end of the tank to compare??

[jinjur]

Yes,

Tank to tank in the past it has been spot on as far as range goes......the average con didn't agree exactly with what I was getting though.

Bear in mind my average con has been circa 29 mpg.

Now it is sitting at 36 ish

I am calculating this full tank rather than trusting the OBC to see how that comes out.

I will also reset the OBC to see.

Regards
Andy

[kowalski]

my 163 auto does 42 in mixed conditions. I reset the journey computer every time I fill up and also calculate the consumption the old fashion way. the obc is a bit pessimistic but only by 1-3mpg.

[Jeff123]

Hi

My OBC is more or less cock on

[SteveF1]

Think I'm having the same problems as jinjur.

My cars at 50000 miles now, bought at 45000 with a used approved warranty still running. The car has begun to exhibit problems around october last year, mainly the traits of running very rough at idle and returning poor fuel consumption. The other was a problem when starting as the car would often refuse to start or have a delay in starting with a coiled spring lighting up on the dash. Due to this and other problems it went back to the dealer last month for warranty work and they detected that two glow plugs (cylinder 2 and 3) were faulty and were replaced under warranty. Suffice to say the starting problem is no more but poor fuel consumption is still present and running at around 30-35mpg on the combined cycle.

Some people say those figures aren't that bad but I drive the same as the day I bought it, maybe even more sfely now I have a young baby and the figures I got when I bought it were vastly higher than they are now. I used to get high 50's on a motorway run, early 40's around town. Now I'd be lucky to get mid 40's on a good motorway jaunt!

I've noticed the difference as I only use my car for work really and the times i'm visiting the pumps a month is more often than I like. Considering I got a diesel for more frugal motoring (after moving from a Golf R32) these figures aren't making sense for me when taking in the higher price I paid for the car over its petrol brethren.

Its going into the dealer tomorrow to have the MAF sensor and fuel injectors looked at because I personally think mine are on the way out.

Just to note, I filled up with V power diesel the other day (cost me £75 for the tank) and it showed 460 miles on the OBC after it was reset. When I bought it the car on supermarket fuel showed 590 miles on the tank mmmm

Something aint right.

Under the BMW used warranty would a maf sensor and fuel injectors be covered?

[jinjur]

Not sure Steve mate.....I have never been priveleged enough to have a warrantied car

Am absolutely interested to see the outcome mate as I am sure we are in the same place with our cars here.

I cant see the MAF being at fault mate, but the injectors are another matter.

Dont take no for an answer with the dealers....economy was what you bought and the car aint delivering any more.



Keep me posted buddy

Andy

[SteveF1]

Annoyed!

The car went in this morning and the arsy service 'advisor' disregarded my thoughts about the MAF sensor and fuel injectors and thought she new what she was talking about but in actual fact sounded thick as muck. She also told me that regarding the fuel consumption its all depenedant on whether I am a boy racer or not and should nothing be found I would be charged a 'fee' of approximately £50. I told her in the nicest possible way that I wouldn't and I handed her my keys. That probably set the tone after just finishing a ten hour night shift.

On picking the car up the same lady ran through the sheet and said that after running the car through some tests (which she couldn't expand on) they had found NO problems with the car and that all the tests were showing the car was fine. It also stated the engine wasn't running rough at idle, it was pulling cleanly and that fuel consumption should be about right on that basis. However, when I got in the car the 'technician' if he should be called that had done less than a mile test drive - how on earth could they test fuel consumption in less than a mile? Also it appears that nothing more was done other than a diagnostic check and both the MAF sensor and fuel injectors were not even looked at.

All in all I feel that had I have been out of warranty the car would have needed 4 new injectors and a new MAF sensor but because I wasn't at the dealer I bought it from and it was a warranty check (and they weren't about to profit) they couldn't give a rats tit and it showed.

It also went in for a notchy gearbox which they didn't even look at stating I should go back to Bowker Preston as they replaced the clutch. It went in for an iffy fob that works when it wants to and has a poor range and didn't even get chance to look at it. It also went in for a newly arrived sratching sound coming from behind the glovebox where the fusebox and control unit is, makes funny noise when the wiper comes to a stop but that was found to be 'normal' as well despite it only just starting to do it...... All in all apart from a free valet its in the same condition I sent it in this morning.

Name and shame time - Williams BMW Rochdale (shocking for warranty work!!!!!)

[MEGA]

Glow plugs. Very interesting Andy. I'll also mention this.

Fortunately the service manager at my dealership of choice is on first name terms with me and I've known for a good few years. Therefore if I just give him the list of things to check, I'm pretty confident he will go through all of it.. And then either return a quote to the warranty people, or just forget about it if theres no problem He's good like that.

I'm going to be booking it in when I get back home, been on site most of this month. So like I said before, mid april for:

Air filter change
Injector clean
Check glow plugs
Check MAF sensor.

If this lot doesn't sort my economy out, I don't know what will??

This topic has been pretty helpful. I'm really looking forward to posting back in here after the work has been done; Hopefully with some good news.

[davvey]

Interesting posts. I have a 320d e91 (2005), and i am getting around 32mpg. I do some short drives, but I had an e46 320d touring before the e91, and i was getting an average of 45mpg doing the same journeys, and if anything i am driving the e91 more gently than the e46 (to try and bring the mpg up)!

The car starts up fine & runs well. I did have the codes read, and it showed that there was one glow plug showing a fault, and the maf also showed a fault. I can't see how one glow plug would affect the mpg so much, and as the car runs so well, i can't see how the maf would be faulty?

Mega, I would be interested to know how you got on (I live near you in Ruislip).

[ElegantSpoon]

This warmer weather has increased my average up to 40mpg from the 36!

[SteveF1]

Mines getting lower avergaing 31mpg at the moment.

For the last tank I put Shell VPower diesel in and that hasn't done anything for the economy at all. However, it does seem to run smoother mind.

[SteveF1]

After complaining about nothing being done with the car last time it was back in today.......

Came out again with still nothing done.

After reporting to BMW Rochdale last time that the fuel consumption was woeful at around 32mpg on the combined cycle they took it for a 1 mile test and stated the diagnostic checks reported no faults. This time they took the car out for a 7 mile trip and the technician reported an average of 34mpg which the dealership stated was 'not great' but that there was no aparent faults and no known reason for the high consumption. They stated the MAF sensor was working correctly and that the fuel injectors were in good condition and the flow of fuel was spot on. They fobbed me off stating there were many variables which affected fuel consumption but when I did a 100 mile motorway trip on Saturday with a steady and constant 70mph I returned an average of 45mpg which I think is quite poor. They stated they didn't know what else to do.

I'm stumped and although VPower has started to improve throttle response, smoothness and engine start up fuel consumption is only slightly up.

My old R32 which the BMW replaced did 30mpg quite easily!

They did address the problem I had with the engine running rough/vibrating a lot at idle. Aparantely an engine bump rubber or something similiar which suppresses engine movement had failed and allowed the engine to move excessively, that was replaced....

You had any good news yet MEGA?

[ss134]

OP - hope you resolve the problem, if i could average 25 mpg i would be a happy man.

[F104]

Hi - don't want to rub it in but I could not be happier with my 320d. I changed winter tyres back to nearly worn out summer's M193's this weekend . Reset obc today- , did 250+mls trip without traffic jams, 80% highway of which 80% between 140kph (88 mph) and up to 170kph, and 10% A roads with roundabouts/ crossings were i pushed it (evolve tuned - still puts a smile on my face everytime i pull away from people just not expecting it), and 10% looking for where i needed to be (i should buy a GPS).
Got 5.6 ltrs/100average, nearly 10% increase from my normal. Outside temp +12C which is still fairly cold and a negative impact on economy. But that is still 50 mpg, and one can't go much faster on public roads. And saw on the OBD reader i had a regeneration as well, so increased fuelling during the 10 mls it took. Give 10% to the Evolve tune, and i would still be at 45 mpg

So what is different on my car?
1) I disconnected the crank case breather from day 1. (turbo) intake side is plugged with a cork. Breather goes into a plastic bottle. I'd like to come up with something better but all available OCC's are for 335i's.
2) Since I have the OBD reader I noticed commanded EGR is 0% above140kph, so now I cruise at that speed where possible = no EGR. The cut off is really not a soft sliding scale, you'll need an OBD reader to see what it is doing. It switches from 20+% EGR to zero on one mph difference
3) Evolved tuned. Best investment ever, it will pay back in fuel savings, never mind the fun.

[MEGA]

Steve - the service is this friday. I've also put a note to check the injectors.

So air filter / injectors check but the guy refused to look at MAF for me.

I'll probably have to lose my remap if I push them on this issue, and get it put back on after - at a cost - so not sure what to do. BMW's first response to every problem is 'software update'..

[ElegantSpoon]

The warm weathers given me 44mpg now and thats for city driving

[SteveF1]

After fobbing me off for the second time BMW Rochdales customer service rep rang me today asking me if I was happy with the service I received on my last attendance. I obviously let him know politely that I wasn't and explained the full circs. In fairness to the guy he did his best talking with the tech guys, looking at the bulletins and even explaining PUMA to me which he explained was a fault referral direct to BMW. Problem was he contacted me back stating that after speaking with BMW he said that their own internal figures suggested that real time fuel consumption figures for the 2006 320D was 38 mpg urban, 45 extra urban and if you were within 5 mpg of those figures then BMW were not gonna authorise the dealer to just start throwing parts at the car to try and improve the consumption. These figures are a far cry from the officially stated figures of 44mpg and 60 mpg respectively, although I never expected to reach those figures anyway. However, I was recording better consumption figures until the start of this year when things gradually went down hill. I did ask if the car could be seen by a regional BMW tech specialist and he stated that there was only one guy that covered the whole of the North West and was fully booked up and I would have to wait in line for him to see the car. I put my name down but don't expect anything to happen.

Suppose i'll have to live with it or get rid.....

[MEGA]

so 33 or below and they'll look at it.

I suppose I need to really press the point with the 26 that I'm returning then!!!

[ElegantSpoon]

I think your in there Mega!!

[DazJ]

Originally Posted by MEGA

so 33 or below and they'll look at it.

I suppose I need to really press the point with the 26 that I'm returning then!!!

Anything to report then following your service?

[jinjur]

Go for it Megs.....

I've given up and we are now looking for an alternative to swap for.

Took a wee A4 and a Ford Mongrel for a test drive and netted 47+ on either in a few minutes of driving through the town.

Shame really but we cant live with petrol economy and cant afford to shovel cash at this car.





JJ