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Re: My driving day tomorrow .....

on Thu May 31, 2018 11:26 pm
Yep .... BMW specialists, all computer linked in to BMW Germany.

I guess I’ve found myself searching the web, and come across millions of posts of ..... can’t find the fault, replaced this and this and this and this and this ....

If they can fix it, and I can get my confidence in it, i’m sure i’ll feel a whole lot better about it.

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Re: My driving day tomorrow .....

on Thu May 31, 2018 11:43 pm
Looking at BMW sites, it is entirely possible that "if" you have a leak at the tank pump, then the fuel pressure at the pressure rail will read too low. This in turn will lead to under fuelling which may show up as running lean... You need someone who actually knows wtf they are doing to read this cars fault codes and fix it....👍

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Re: My driving day tomorrow .....

on Thu May 31, 2018 11:52 pm
From what I have read and people I have spoken to the issue is that often the problems can't be fixed, or the fixes don't last.
Lad at work bought a 325i from a main dealer. It had new 6 coil packs fitted a few months before he bought it under warranty. About a year into ownership it started to have intermittent problems so he took it back to the dealer.
Probably the coil packs sir, all we can do is fit 6 new ones, at a cost of £1500. But they were replaced by the last owner? Yeah but that was over 12 months ago and they only come with a 12 month warranty.

He got rid shortly after that.

The cars are so complicated even the dealers don't really know how to fix them.
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Re: My driving day tomorrow .....

on Thu May 31, 2018 11:52 pm
It had a new fuel pump 18 months ago.

Apparently just reading lean bank 1 and lean bank 2.

Could be as simple as the fuel filter, or needing a new MAP sensor, or air leak, or it could be the pump again, or the Vanos, or the DIVA valve(?!), etc, etc, etc  ... that’s the problem - so many things that could make it run lean.

I know I said the same last time - but if this turns out to be a wrong move (buying his car) it’s the last time i’ll buy a BMW .... but the problem is it’s not just BMW - Mercedes are just as bad .... the Germans just make their cars far too complicated ... air pumps and stuff to head the cats up quicker ... all stuff to go wrong
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 7:47 am
I know the pump was replaced, but what I'm saying is the gasket on the tank when the pump was replaced could be drawing air...

However, that aside, if the temp sensor is fine you need a specialist to do a live data reading while the car is being driven. That should flag up a problem. Even better, get it on an oscilloscope which will show what's causing the fault.

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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 8:08 am
Doo 1 wrote:I know the pump was replaced, but what I'm saying is the gasket on the tank when the pump was replaced could be drawing air...

However, that aside, if the temp sensor is fine you need a specialist to do a live data reading while the car is being driven. That should flag up a problem. Even better, get it on an oscilloscope which will show what's causing the fault.

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Oh dear, it gets worse... the list of possible issues gets longer - fuel pump gasket now, and of course, fuel pump again !!!
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 8:45 am
You’re never going to have a troublefree Car LK if you want flash but don’t want to spend brand new cash...

At 8yrs old you could have warranty direct covered it I’m assuming

There’s stacks of reports on lean bank 1 & 2 issues with that level of variety of fixes

If it makes you feel better speaking to a guy last nights whose brother is on his 2nd 911 engine rebuild... They’d only warranty for 12 months... ouch!!!
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 9:56 am
What Paul said. If you want flash but don't want to pay new car money you need to expect problems.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 10:07 am
Always expect problems, and happy to pay for the fix, and appreciate I am trying to run champagne on beer money ... it’s the whole ‘we can’t find the problem, you could try this’ that stresses me out.

That was the big difference when I changed from my Alfa to my Audi ..... both went wrong - but Alfa could never find the problem, and Audi always nailed it first thing time.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 10:16 am
An auto electrician said something similar to me once about the difference between French and German cars. I think the trouble is they have gotten so complicated now that you need an electronics degree to fix them.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 12:55 pm
My idea is take it up here to me and I'll suss it out.

Running lean can be anything to do with low fuel pressure to drawing air after the MAF sensor.

However, at start up the mix should be a bit richer if it is getting the correct signal from the temp sensor. So ask the mechanic to do a cold start live data test. This will confirm if the sensor is indeed providing the correct signal data to the ECU.

The normal temp sensor is simply resistance operated (it's a thermistor) so when cold, the impedance reading should be between 1500 and 2500 ohms. When hot, it should read between 375 and 275 ohms (these are average values so a little over or under is fine, but way over/under needs checked out or if it's low when cold or high when hot).

That's a very easy test during live data reading.

Next I would be looking for split rubber hoses because at 8 years old in that environment of extreme hot & cold, they will split, especially breather hoses who's innards can be subjected to the disgusting oil gasses and whatnot. More so with EGR valves and the like.

Another value that can be established is the MAF reading because it measures the amount of air at any given throttle setting and signals to the O2 sensors are paramount to a correct intake reading. Leaks after the MAF will create a weak mixture, but the MAF is telling the engine "this" amount of air is coming past me, so the ECU is getting a corrupt signal because while the MAF is sending the correct signal, there is in fact less air going in for a given amount of fuel (running rich). Your car is telling you it is running lean, so we cant rule out the MAF in the meantime because it could be faulty and giving the ECU a signal that not enough air is coming past it, so the fuel mix will be leaned down.

All the pipes & hoses to the inlet manifold and the inlet manifold itself need to be checked for splits & cracks.

The O2 sensors "could" be faulty, but less likely. However, this is again something that needs to be looked at using a live data reading.

I cannot stress enough the value of a competent operator who knows exactly how to use the equipment so if you aren't getting any joy from the current guy, look for recommendations on FB or some such and get some place who specialise in this type of work. It may cost a bit more, but it's cheaper than replacing this & that!
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 1:52 pm
Thanks mate - i’d love to have you look at it, but can’t see how that’s going to work.

Been in to see them, and they’ve had it live fed to BMW and they are saying everything is good - fuel pressure, etc, etc.

The car literally trips out once most (some) mornings, and then it’s all good.

Fuel pressure, etc, etc all ok.

I don’t think they have smoke tested it .... but they are going to pull the plugs now, as they have said that if someone has replaced with incorrect plugs, it could trip it out as they’ll flood a little ?

Sound plausable ???

Although they are a BMW specialist, I don’t see them putting much effort in to it.

So, it’s not looking like fuel pressure.

I was thinking DISA valve maybe ... but this garage (rightly or wrongly) seem more interested in just what the computer tells them.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 7:00 pm
The thing is though the computer should be able to tell them what is at fault, otherwise they're just going to start replacing bits in the hope tbat it fixes the problem. This is a very expensive way of doing it unless they just happen to get lucky.
BMW managed to squeeze 272 bhp out of a 3 litre engine whilst keeping it in the £300 tax bracket and managing 30+ mpg. Look at every other 6 cylinder engine out there, IS250, X Type, St220 etc and every other car making similar power such as a WRX or 370z and they are all in a higher tax bracket and all drink more fuel.
20 Years ago BMW needed to use individual throttle bodies to get similar power from the 3 litre E36 M3 and it was a hell of a lot more highly strung and thirsty. Now similar power is achieved with a load of clever electronics and inovation. Sadly inovation isn't the route to reliability, using tried and tested tech is. So these kinds of problems are the price you pay for such a powerful yet economical motor that is equally as happy going to the shops in town as it is screaming up the autobahn at 150mph.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 8:15 pm
Teeps, that was superb. Like reading a BMW brochure! ( apart from the reliability dig bits)
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 8:32 pm
So, the garage was meant to call me before the end of the day with an update - but didn’t.

Which means that my car is probably on some street corner until they open again in Monday - so the question is - do I go and steal it back, and put the wind up them ?!
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 10:53 pm
Thanks Crix. At the time BMW won awards for that engine and on paper it is unbeatable. However the price you pay for all that clever tech is reliability.
LK they haven't rang you because they don't have an update. Just hang fire and ring them tomorrow.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 11:22 pm
Well - here is the crack.

I realised tonight that I needed a car seat out of the car - so whilst I was out, I went to find the car - there it was, sat in the road, with my newly refurb’d alloys about an inch from the curb ... so I grabbed the seat, and went to move the car away from the curb slightly ... and I had to give it loads of welly to break the pads off the discs !!!!

So, have they even looked at it ???!!!!

I left it on Tuesday morning ... and have had zero updates apart from today when I walked in, and they told me that they were going to call me later, but no faults found ...

I don’t want confrontation, but i’m not a mug either ...

Andoo - if they’ve plugged it in, and linked it to BMW - would you get a print out ??

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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 11:31 pm
Just ring them and be honest.
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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 11:43 pm
Closed til Monday, but I will.

I think I will collect the car, and just make an excuse that I needed to use it to ferry the kids around, but I did notice that the brakes were stuck to the pads where it’s obviously been sat for a few days, so is there a plan from here ....

I wouldn’t outright say they are lying, but i’ll let them take the lead on whether they actually want to give it some attention, or whether they want to charge me a minimal fee for plugging it in to their computer, and i’ll keep the car and run it for a while.

Garage gets loads of 5 star reviews - but i’ve definitely not been given any kind of service so far

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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 11:44 pm
I wouldn't get a print out, they might though... 😝😁😂 Aha, I'm hilarious 😅

Seriously though, if they did actually plug in and read any stored codes the computer they used would likely then be plugged in and the data sent down the wire to BMW.

The reply would be an email or perhaps just more data sent back to the computer to plug in and update your cars mot. However, they would have to have some proof of communicating with Germany.

You must insist on a live data, but to be honest you would be better going and taking your car home and go in tomorrow to demand your key as you are less than impressed with the shit service.

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Re: My driving day tomorrow .....

on Fri Jun 01, 2018 11:47 pm
What the Fuc.k? I have no idea why this stupid phone inserted the word mot there....🙄

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Re: My driving day tomorrow .....

on Sat Jun 02, 2018 6:09 am
Do they normally store customer cars on the road?!

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Re: My driving day tomorrow .....

on Sat Jun 02, 2018 12:42 pm
hugh121 wrote:Do they normally store customer cars on the road?!


That was my thought. I mean, you're paying these jokers to look into why your car is being a dick so why are you paying for them to store it on the road where any old Johnny can happen along?

Take it home Lorraine...
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Re: My driving day tomorrow .....

on Sat Jun 02, 2018 12:55 pm
Doo 1 wrote:
hugh121 wrote:Do they normally store customer cars on the road?!


That was my thought. I mean, you're paying these jokers to look into why your car is being a dick so why are you paying for them to store it on the road where any old Johnny can happen along?

Take it home Lorraine...

Going to get it shortly.

Andoo - fancy a flight down to take a look at at ??
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Re: My driving day tomorrow .....

on Sat Jun 02, 2018 1:42 pm
Would love to, but I don't posses the equipment to properly plug into it (my mate Ian does though, and his garage is only 12 miles away from me so any excuse to go there).

However, I think you need an expert so I have emailed Car Mechanics magazine to see if they have any recommendations. Are you in Kensigton or did I get that wrong?
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Re: My driving day tomorrow .....

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