[napeHbNYC]

Hi, guys, I’m sorry in advance but it’s going to be a long post to give full details.

I little history on the car. I bought it in December of 2018 with 84k miles, completely stock, 1 owner from Audi of Virginia Beach with a comprehensive service history and the car ran like a dream for 10k or 1 year. The car is a 2012 35D X5.

One day during pouring down rain I was driving to work and all of a sudden the car shut off on the highway. I pulled over, gave it a crank and it fired up. My mechanic(BMW mechanic with over 40 years experience I used the last 10 years) was on the way to work so I decided to stop by him, the car kept randomly shutting off while on the freeway every few miles but every time restarted right up. Made it to him, he checked the car, found a little wet spot by injector 5, dried it out, car set overnight. He said he checked injectors and they were fine(I thought it was the dreaded injectors shirt from leaking partition).

Picked up the car and it was fine for a few weeks. Then it started to randomly smoke at idle from the tail or sometimes driving(moderately, no heavy acceleration) with a lot of white smoke and pronounced lack of power and knocking, with heavier acceleration it would throw a half engine code. R TD he weird thing also that if it ran fine and you accelerated, it would be doing fine under steady throttle but then all of a sudden it would start puffing smoke, knocking and accelerating on its own even if you pushed brakes, and shutting off after that.

Brought the car in, we checked the codes and it was catalyst threshold temperature on one of the banks. So I brought to dealer for a diagnosis of DPF and SCR as advised by mechanic, dealer confirmed clogged DPF and SCR, I asked to check injectors but don’t think they did. It given $8500 bill for the above mentioned I picked up the car.

As I was going to do it down the road anyway I did a full delete(SCR, dpf, egr, swirl flaps) with DUDMD tune stage 2. After the start, it was running fine but again producing a lot of white smoke at idle and while driving so the problem persisted as well as the same occasional knocking and lack of acceleration.

So we went back to what started it all-water on injectors. Pulled all injectors, sent them out for testing, injectors 5&6 were completely shorted, so last night we reassembled everything with two new injectors(same harness), codes them in. After the full assembly it took probably 20 times to crank and prime the fuel before the car fired up. After it started it ran fine with no smoke, just black smoke on acceleration. Took it for a test run, at first it was ok. Then under a regular throttle(nothing heavy or flooring) all of a sudden the car started pouring white smoke to the point you cannot see behind you with that same knocking, kept accelerating on its own even after pressing brakes, and shut down.

We pulled on the side of the road, checked fluids and under the car, oil is still in the car. No metal particulates or anything in the oil filter, the car cranked but didn’t start as if there were no fuel(just a guess). The only code was fuel pressure plausibility low or something very similar. As it was 2 am already, I just told mechanic I’ll have the car towed to his shop and we’ll deal with it later.

Basically it all seems to started after the damn rain and even after replaced injectors and removal of supposedly clogged SCR and dpf the problem remained unchanged. I’m at a complete devastation as it is my daily and first diesel car, both me and mechanic are lost right now.

When we(I would ask him to work one the car as I was there which he didn’t care about) remover the manifold there was a little oil in it, and turbo bearing seemed fine no rattle or anything.

Please help!!

[napeHbNYC]

I have few short videos of idle, rev and driving but don’t know how to post.

[napeHbNYC]

Here is my lame attempt at uploading

View post on imgur.com

The videos are before doing injectors but already after deletes. After the injectors were done like you can read in the story above nothing has changed, same smoke, same knock.

PS Watch the videos with sound on.


Thank you again!!!!!

[maryjane]

No sound in videos

[Owen81]

Get a BMW scanner and post the codes for starters. 9 paragraphs and you didn't list an actual code.

When you did the injectors, did you see oil around the valve cover? Did you code the injectors to the DDE on replacement (which is required)?

If you had an engine runaway, the motor is likely toast. Engine revs without throttle would have to mean it was eating oil from somewhere, VCG or turbos?

Sounds like you have multiple issues going on, one of which is a mechanic with no BMW diesel experience. You need to find someone who knows these engines and not the dealer!

[napeHbNYC]

The car is at his shop now, there was not even a slow sip of oil around the VCG, only swirl flaps were leaking some. The only code the car had when shut off last time was was a fuel rail pressure plausibility one. He didn’t try to start the car yet as he is not in till tomorrow, but on trying to restart the crank was very slow even with a set of jumping cables. As I’m doing the research could it be the HPFP?

[335dlci]

Originally Posted by napeHbNYC

The car is at his shop now, there was not even a slow sip of oil around the VCG, only swirl flaps were leaking some. The only code the car had when shut off last time was was a fuel rail pressure plausibility one. He didn’t try to start the car yet as he is not in till tomorrow, but on trying to restart the crank was very slow even with a set of jumping cables. As I’m doing the research could it be the HPFP?

Vcg dont normally leak externally but internally.... like as mentioned. Your "mechanic" may be good at other makes and models but not this specific model
A doctor is a doctor but they specialise in different things... you wouldnt go to the foot doctor to have your teeth looked at..would you.

[robnitro]

"kept accelerating on its own even after pressing brakes, and shut down."

Thats a runaway condition from oil or excessive fuel. Is the oil level going down fast? You could have a leaky turbo OR its leaky from a clogged CCV (crankcase) pressure. Either acts similar, and you can test the pressure by idling the car and opening the oil cap and let it rest, if it gets blown off, you have too much blowby or CCV clogged.

Let us know and good luck.

[RL18]

Originally Posted by robnitro

"kept accelerating on its own even after pressing brakes, and shut down."

Thats a runaway condition from oil or excessive fuel. Is the oil level going down fast? You could have a leaky turbo OR its leaky from a clogged CCV (crankcase) pressure. Either acts similar, and you can test the pressure by idling the car and opening the oil cap and let it rest, if it gets blown off, you have too much blowby or CCV clogged.

Let us know and good luck.

And this is why we leave the ASV installed

[apexit4]

Originally Posted by RL18

And this is why we leave the ASV installed

Can you refresh my memory on what the ASV is? A quick google search yields upgraded silicone intercooler hoses...

[maryjane]

What is anti shudder valve?
Cuts the air supply to the engine when the ignition is turned off, for a smoother shut off. Also useful if the engine starts to run on it's own oil, such as when the turbo seals go and oil is dumped into the inlet. Without it when this happens even when the engine is shut off it will continue to run.

[napeHbNYC]

Oil level didn’t get affected pretty much at least not to the point to able to notice a change. When I opened the oil cover or the ccv cover the stream of air is pretty strong.

Also how do I add sound to the imgur video?

[maryjane]

Make sure the CCV isn't clogged. Prob need to remove it completely to make sure. As said in previous comments its getting oil from somewhere.

[RL18]

Originally Posted by maryjane

What is anti shudder valve?
Cuts the air supply to the engine when the ignition is turned off, for a smoother shut off. Also useful if the engine starts to run on it's own oil, such as when the turbo seals go and oil is dumped into the inlet. Without it when this happens even when the engine is shut off it will continue to run.

^^ what he said lol

[RL18]

Originally Posted by napeHbNYC

Oil level didn't get affected pretty much at least not to the point to able to notice a change. When I opened the oil cover or the ccv cover the stream of air is pretty strong.

Also how do I add sound to the imgur video?

For the video, why not post a youtube video then attach the link? That's what I usually do and it seems to work for me