The return of my E60 M5 - Wallet drained - now Supercharged!

[TheAngryDog]

E90_M3Ross said:

Do you mean you plan to swap the SMG out for DCT?

If it isn't earth shatteringly expense, then yes.

[TheAngryDog]

E90_M3Ross said:

TheAngryDog said:

E90_M3Ross said:

Do you mean you plan to swap the SMG out for DCT?

If it isn't earth shatteringly expense, then yes.

I think that will be a very good upgrade. 100% it can be done, there's an E46 M3 on Youtube that's running the V10 engine with DCT. The shifts in auto are so much smoother, and faster when pressing on. It's a good gearbox and suits these high revving engines really well.

There are a few converted cars around now. Some use CanTCU and there are others around using different controllers. Evolve are looking at using the standard TCU rather than an aftermarket one.

Mr Tidy said:

TheAngryDog said:

E90_M3Ross said:

Do you mean you plan to swap the SMG out for DCT?

If it isn't earth shatteringly expense, then yes.

That ought to be an improvement, although I'd be looking for a manual box like US cars had as an option - so long as it could cope with the S/C power!

I've driven a manual M5 - it was fun rowing my own gears, but I preferred the SMG!

bodhi said:

Fantastic pictures of a fantastic example of one of - if not my favourite BMW.

Apologies if I've missed it on the thread (or asked it already lol) but is that running the standard exhaust or something a bit fruiter?

Cheers!

It has a cat back stainless on it so it sounds a bit fruitier. No rasp or drone which is nice.

car user said:

Interesting idea to swap in a DCT. Certainly makes sense since the DCT is the spiritual successor to the SMG.

I know of a guy who specialises in custom DCT software builds, so not your typical "mapper". You'll probably want a custom tune if going with the DCT as you'll want to up the line pressure to allow the box to hold up to 1000nm. He can get the M3 GTS software working with the box so you retain the Drivelogic settings and have the correct final drive ratio for the M5 rear diff.

Something like a CANTCU would be needed to get the DME to talk to the TCU as the S85 DME probably won't have the correct CAN interface for the DCT. CANTCU lists the M5/M6 support as coming soon, so you're in luck there.

I'm hoping Evolve manage to sort it with the standard TCU as I'd very much prefer to not use an aftermarket TCU if I can.

So, yesterday the pumps and filter were replaced. The result? Same issue. Pretty frustrated now.

Today I have booked it in with a company who can do some live datalogging on their dyno so we can see what is going on as I don't want to blindly throw parts at it.

[TheAngryDog]

Oh yeah, forgot to mention that for some reason after disconnecting the battery to replace the fuel pumps, I now cannot turn off DSC or turn on MDM.

Can the car gods give me a break?

[TheAngryDog]

E90_M3Ross said:

TheAngryDog said:

Oh yeah, forgot to mention that for some reason after disconnecting the battery to replace the fuel pumps, I now cannot turn off DSC or turn on MDM.

Can the car gods give me a break?

fking hell have you scanned it for codes?

I scanned it with my Foxwell tool that is specific for BMWs and no codes are present. I am going to hook up Ista to see if that can do a more deeper dive.

Court_S said:

Which module controls the DSC / MDM? Just wondering if one of them has been fried - FRM’s seem to be a liability when disconnecting batteries and I’m wondering if something similar has happened.

The module is connected to a pump. I'm hoping that Ista gives me a better answer when I scan the codes tonight.

[TheAngryDog]

Court_S said:

TheAngryDog said:

The module is connected to a pump. I'm hoping that Ista gives me a better answer when I scan the codes tonight.

Possible flooded pump? I know it’s an issue on the smaller platforms.

It was fine until the battery was disconnected. I always drive in MDM mode.

[TheAngryDog]

The saga continues.

Dsc still will not disengage.

I've pulled all of the fuses to no avail. We've flashed, recoded, defaulted and readjusted the DSC to no avail. This proves that the module is ok.

I've tried a steering angle sensor readjustment to no avail.

While scanning codes the car has thrown up an unusual one. 0027CF. This is a fuel pressure code but one that doesn't put the engine management light on. Possible causes are faulty fuel pumps, pressure regulator (both new), faulty ekp module or a problem with one of the intank fuel pipes. I will find out on Saturday.

There is also an issue with one of the floats so that will get looked at. I haven't ruled out putting the old pumps and filter in as apparently in rare circumstances, a fuel code can cause issues with the DSC. I'm also going to bridge the dsc plug to see if I can force DSC to disengage.

I've also been told that it may be worth recoding the battery in, as it may have forgotten what is fitted.

I have to say, I am getting just a bit fed up now and if the DSC issue cannot be sorted then I am going to break the car for spares.

[TheAngryDog]

d_a_n1979 said:

FFS

It's little things like this that really test your mettle!

Don't lose faith; you'll soon have it sorted and back to where it needs to be

It's definitely pushing me. It's not a small thing really, the DSC issue stops me from ever being able to sell the car as a working car as such.
I am hoping it gets sorted this weekend, otherwise I'll just have to throw it at an indy to look at.

325iMSport said:

Limited100]shenton1975 said:

Lovely memories.....



That's absolute perfection right there.

I miss mine badly

If I get another it'll be kept for a long, long time.

Looks nice, which blue is that?

Interlagos Blue by the looks of it.

SturdyHSV said:

TheAngryDog said:

The saga continues.

I have to say, I am getting just a bit fed up now and if the DSC issue cannot be sorted then I am going to break the car for spares.

Saw the stuff in the chat mate, it sucks!

I still need to have a ride in it after the supercharger, my fingers are crossed it's granted a stay of execution!

Yep it properly sucks. Hopefully it's sortable as I don't want to sell it, not yet anyway!

E90_M3Ross said:

Why would you break the car (do you mean as in totally break it/effectively scrap it?) for something that seems caused by upgrading it?

The supercharger has nothing to do with the DSC breaking. I cannot disengage traction control. Full power is not available because DSC just saps it. I can't easily sell the car whole as it's "not working" and it's worth more money in bits.

[TheAngryDog]

This evening I ruled out the DSC button, I bridged the plug and nothing happened.

Removed the DSC fuse which caused the DSC to fail as expected, so at least it can be turned off.

[TheAngryDog]

Something interesting happened on Saturday.

I met up with some friends who had a look at the float on the filter side of the tank. It had become unclipped so we were pretty certain that this was the culprit for my fuel gauge woes. It turns out it wasn't, the driver's side float seems to be playing up, so no fuel on that side is being read. My car currently shows a range of ---

So I'm just going to get it booked in to one of my local places and get them to remove and re-seat the pumps and hopefully the float.

So what was the interesting thing? As I was leaving the MDM light flashed up on the dashboard for about 30 seconds, then disappeared again! Then when I got home and pretty much the instant I drove part way onto my driveway, the MDM light popped up and stayed on. I could even turn it off, turn DSC off as well.

I went around the block, still working fine, got back home, turned car off, turned it back on, still OK. left car for 5/10 mins, came back to try MDM / DSC off and no dice. So this has led me to think it may be a voltage issue.

I checked the battery resting voltage yesterday and after the car had gone to sleep it was showing 12.15v, which is apparently a bit low. I have ordered a new battery which I will fit and need to code in to the car when it arrives.

I ran some checks in ISTA as well to confirm.





If this doesn't work then it will be onto DSC Module / Alternator. The Alternator can cause odd issues when it is on its way out.

[TheAngryDog]

Thanks, me too. I still have my doubts but this is at least something I can do and it is inexpensive.

Battery arrives tomorrow, hopefully I get home from work early enough and I can fit it.

[TheAngryDog]

I thought it may be a battery issue so I have replaced and registered a new battery to no avail.

Why did i think it was a battery issue? Well oddly, on Saturday I ran several fault checks while my car was running and then when I was ready to set off driving. MDM mode engaged and then disappeared about 30 seconds later.

I had a 70 minute drive and when I arrived at home, I pulled onto the driveway and MDM engaged, but this time it stayed engaged. I could turn it on and off and disable DSC.

I went for another drive around the block without turning the car off, and all was well.

Turned the car off and then back on and it was all still working.

I then locked the car and left it for a bit and then came back to it and i could no longer engage MDM or disengage DSC.

So this led me to a battery issue. But today, changing the battery made no difference.

I've ruled out the buttons, we have been able to reflash the DSC module, but could it be that the module got damaged when the battery was initially reconnected?

I'm very much at a loss now. Pulling up to my driveway did something (it's a slight incline), but what I don't know.

I have zero codes relating to the DSC. The only codes I have are for the fuel level sensors, which for some reason have decided to not work after refitting the filter on Saturday.

Does anyone have any suggestions?? No matter how stupid it may sound? It's driving me mad.

It looks like I may have to take to a specialist as it's gone beyond me now.

[TheAngryDog]

Gallons Per Mile said:

Replace that particular module. Yours may be faulty even with no 'codes'

If it was going to fail, I'd expect it to fail in the DSC OFF position, rather than DSC on. I am however looking for a replacement.

Jakg said:

I've not read the full thread so sorry if these aren't sensible, but you asked for ideas:

• have you checked the voltage at the unit, and the grounding points for that circuit?
• what about checking the data on the CANBUS line to the module (i.e. checking shape of waveform with oscilloscope)?
• what is the activation criteria for MDM - I would guess that there'll be conditions ( TIS lists having sufficient brake fluid, for example) - could it be not an MDM fault but an issue somewhere else?

1> no, the module is a sod to get at. Have to take the drivers side front wheel off and the arch liner, and then it's not straightforward to get to.
2> no, see above.
3> No, and I'd have no idea how to do that! Know anyone / where who can? I don't mind a travel.
4> I haven't checked brake fluid - I have no codes for it, but I will check the level!
Thanks.

TheAngryDog said:

I've ruled out the buttons, we have been able to reflash the DSC module, but could it be that the module got damaged when the battery was initially reconnected?

Jakg said:

You'd usually get no comms or something when the electrical system kills a module, but there can be weirder manifestations.

Exactly my thoughts, and we can communicate to it fine.

drdino said:

Have you checked the module's connector for any signs of (water) damage? Tyre pressures ok?

No I haven't, but I do want to. Tyre pressures are fine. I've also done a reset via iDrive.

E90_M3Ross said:

Gallons Per Mile said:

Replace that particular module. Yours may be faulty even with no 'codes'

Yep. Ask me how I know modules can be faulty without codes

I hate these cars

Thanks everyone.

[TheAngryDog]

Jakg said:

TheAngryDog said:

Jakg said:

• what is the activation criteria for MDM - I would guess that there'll be conditions ( TIS lists having sufficient brake fluid, for example) - could it be not an MDM fault but an issue somewhere else?

I haven't checked brake fluid - I have no codes for it, but I will check the level!

Remember, it's not the actual level, it's what the sensor is reporting. I'm sure you can see live what the data is in ISTA.

That was just an example, obviously, TIS lists more criteria.

It's not a terrible suggestion by any means. I will check the level and check what ista is seeing. Thanks.

[TheAngryDog]

Pommy said:

If only it wasn't so bloody true

[TheAngryDog]

We are still in the land of leanness. Having tried to do some more datalogging, all we could get out of it was that at idle my car is running fuel trims of 14%+ on bank 1 and 5% on bank 2. This could be a vacuum leak issue or an injector issue. It's booked in to have both looked at later this month.