3.0si - 100k - not feeling itself

RyanB88 · Post by **RyanB88** » Tue May 30, 2017 7:52 am

Right. Now there's isn't torrential rain, I've drove into work this morning and there isn't any hesitation, no unwillingness to rev or any of the issues it had yesterday. Completely back to normal with everything ?!

A few years back I had an RX8 which had a cold air filter at the bottom of the front bumper. It used to get wet during heavy downpours and acted very similar to how my zed acted yesterday.

It's making me think it's somehow water/ air intake related.... even though my zed has the standard intake... water may somehow be getting into it? Not enough to hydrolock but enough to cause some issues

One baffled z4 owner!

Joycey · Post by **Joycey** » Tue May 30, 2017 8:27 am

I'll throw another curve ball out there. I had a similar issue with my Si where the rev's would be sluggish to respond and slow to drop it almost felt like everything was delayed, In the end I tracked this down to the vanos solenoids. Replaced both took about 20mins and shes been good as gold since.

Let the fun begin finding what your exact cause is

RyanB88 · Post by **RyanB88** » Tue May 30, 2017 11:58 am

Joycey wrote: ↑Tue May 30, 2017 8:27 am I'll throw another curve ball out there. I had a similar issue with my Si where the rev's would be sluggish to respond and slow to drop it almost felt like everything was delayed, In the end I tracked this down to the vanos solenoids. Replaced both took about 20mins and shes been good as gold since.

Let the fun begin finding what your exact cause is

Thanks mate, a good shout. But I think more likely to be somehow rain related due to a leak or something of that nature now

RyanB88 · Post by **RyanB88** » Tue May 30, 2017 4:36 pm

OK So...

Driving perfect again today !

Had the air filter out and it's bone dry and very clean, replaced around 1500 miles ago.

Can't see any obvious leaks here. Will plug it into Carly when I can tomorrow night and update the thread

RyanB88 · Post by **RyanB88** » Wed May 31, 2017 4:55 pm

Finally managed to plug Carly in tonight!

Ok so the only engine fault code is this:

Control input - vanos bank 2
002A82

Anyone had this before or think this is related to the problem? It wasn't there this time last week!

kis · Post by **kis** » Wed May 31, 2017 5:10 pm

RyanB88 wrote: ↑Mon May 29, 2017 9:32 pm Thanks for everybody's help and to you dan too

I've just nipped out quickly with the lights on, so the dashboard was obviously lit up too. Not sure if this is related but I assume it must be. When I gave the car WOT at 2500rpm the dashboard lights switched off/dimmed for about 2 seconds. I'm now thinking ignition coils more likely?

Mines done this before too. On different occasions. I've not been able to associate it with anything tho. I don't even recall if I was 'WOTing' the car or not! Let me know if you discover what it was!

RyanB88 · Post by **RyanB88** » Wed May 31, 2017 5:20 pm

kis wrote: ↑Wed May 31, 2017 5:10 pm
RyanB88 wrote: ↑Mon May 29, 2017 9:32 pm Thanks for everybody's help and to you dan too

I've just nipped out quickly with the lights on, so the dashboard was obviously lit up too. Not sure if this is related but I assume it must be. When I gave the car WOT at 2500rpm the dashboard lights switched off/dimmed for about 2 seconds. I'm now thinking ignition coils more likely?
Mines done this before too. On different occasions. I've not been able to associate it with anything tho. I don't even recall if I was 'WOTing' the car or not! Let me know if you discover what it was!

Not sure about that but it's a side issue now because I have a fault code... never done that before or since!

If anyone has any advice regarding

Control input - vanos bank 2
002A82

I'd appreciate it

kis · Post by **kis** » Wed May 31, 2017 7:36 pm

No idea about the fault but vanos issue is probably seal related... DLV just did his M54 and I'm sure it's not too different on the facelift...

Que other more helpful answers!

Smartbear · Post by **Smartbear** » Wed May 31, 2017 7:48 pm

kis wrote: ↑Wed May 31, 2017 7:36 pm No idea about the fault but vanos issue is probably seal related... DLV just did his M54 and I'm sure it's not too different on the facelift...

Que other more helpful answers!

As far as I know the n52 facelift engine doesn't suffer the same vanos seal issues as the m54 does, I'd be more inclined to think vanos solonoids/filters.
Swap them over with each other & see if the fault changes banks

Rob

RyanB88 · Post by **RyanB88** » Wed May 31, 2017 7:58 pm

Smartbear wrote: ↑Wed May 31, 2017 7:48 pm
kis wrote: ↑Wed May 31, 2017 7:36 pm No idea about the fault but vanos issue is probably seal related... DLV just did his M54 and I'm sure it's not too different on the facelift...

Que other more helpful answers!
As far as I know the n52 facelift engine doesn't suffer the same vanos seal issues as the m54 does, I'd be more inclined to think vanos solonoids/filters.
Swap them over with each other & see if the fault changes banks
Rob

Thanks for the suggestions so far all!

Rob - can you tell me more about the Vanos solenoids? How many is there? Are they easy to change? Are they interchangeable? Where's the best place to buy a new one/ pair for? Do you need to replace the pair like you would with suspension on both sides?

Any other info or DIY guides appreciated !

Smartbear · Post by **Smartbear** » Wed May 31, 2017 8:05 pm

RyanB88 wrote: ↑Wed May 31, 2017 7:58 pm
Smartbear wrote: ↑Wed May 31, 2017 7:48 pm
kis wrote: ↑Wed May 31, 2017 7:36 pm No idea about the fault but vanos issue is probably seal related... DLV just did his M54 and I'm sure it's not too different on the facelift...

Que other more helpful answers!
As far as I know the n52 facelift engine doesn't suffer the same vanos seal issues as the m54 does, I'd be more inclined to think vanos solonoids/filters.
Swap them over with each other & see if the fault changes banks
Rob

Thanks for the suggestions so far all!

Rob - can you tell me more about the Vanos solenoids? How many is there? Are they easy to change? Are they interchangeable? Where's the best place to buy a new one/ pair for? Do you need to replace the pair like you would with suspension on both sides?

Any other info or DIY guides appreciated !

Hi, there's 2 solonoids that are interchangeable with each other, simple to change with only one fastener on each.
It's ok to replace one as mini recently did this with our Cooper, eurocarparts sell them, I should think they're cheaper than bmw if you use their constantly available discount codes.
I'm sure I've seen guides on utube for n52 solonoid changes & how to remove/clean the filters.
Rob

RyanB88 · Post by **RyanB88** » Wed May 31, 2017 8:18 pm

Thanks again fiend your help Rob!

I've got this Saturday booked to myself to machine polish the whole car and clean out the vanos solenoid. I've reset the fault code for now and hopefully it works fine until the weekend

Found some videos helpful on YouTube.

Will update the thread with an update

cherrym · Post by **cherrym** » Wed May 31, 2017 11:24 pm

You can get an idea if the valvetronic sensor is on the way out by takeing the plastic rocker box cover off and disconnecting the multi plug from the front top of the rocker box itself.If you look down and see oil lying around the multi pins then the sensor is leaking inside.
Mine was leaking and caused a miss around 3000 revs.New sensor was £320 plus new rocker box gasket.

RyanB88 · Post by **RyanB88** » Tue Aug 28, 2018 11:49 pm

Never updated this post - it was the battery for anyone with similar symptoms ! New battery cured it

ph001 · Post by **ph001** » Wed Aug 29, 2018 10:47 am

Always nice when people come back to conclude problems - battery was mentioned but have to say it wouldn't have been top of my list, esp when the alternator provides all the power when the car is running and you never mentioned any starting issues. These cars certainly seem very sensitive to aged batteries causing all sorts of weird and wonderful problems.

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