After Ess vt2650 install problems started! need help!!

[6ab6ab]

I have a 2009 e92 m3 dct and just bought this used kit off a forum member and it was clean , here where I live (Kuwait) we don't have any "professional garages" but there is this one garage that installed 1 Ess kit before , so I did my installation at his garage and forgot to mention I replaced the rode bearings as well , after the installation I uploaded the new Bpm tune and started for the first time I drove it back home then the next day the problems started one of which is the stalling of the car. The second is that when I had the car in D and press the gas the rpm drops under 500rpm followed by a sudden jolt. It is as if I'm driving a manual car and released the clutch, causing the car to jolt. Other then that the gear switches are good and the car is moving fine. I have spoken to Mike and we suspect it might be a problem with the idle control valve or a vacuum leak , honestly guys if anyone can help by maybe trying to address the issue it would be greatly appreciated I am going to attach these videos that shows the problem and let me know what you think ! Thank you all

[6ab6ab]

[6ab6ab]

skip to min 1:07

[W Cole]

Is your check engine light on? What are the codes?

[6ab6ab]

skip to min 1:16

[6ab6ab]

Originally Posted by W Cole

Is your check engine light on? What are the codes?

272c oxygen sensor, output-stage diagnosis, heater after cat, bank 1
272d oxygen sensor, output-stage diagnosis, heater after cat, bank 2
2b62 servotronic, converter current

the engine light that is on is the service engine soon light , and i had this engine check light before installing the supercharger , and the first 2 first codes about the oxygen sensor i had them before installing supercharger as well

[Facsombh]

Originally Posted by 6ab6ab

272c oxygen sensor, output-stage diagnosis, heater after cat, bank 1
272d oxygen sensor, output-stage diagnosis, heater after cat, bank 2
2b62 servotronic, converter current

the engine light that is on is the service engine soon light , and i had this engine check light before installing the supercharger , and the first 2 first codes about the oxygen sensor i had them before installing supercharger as well

Does look like those 2 first code oxygen sensor's messed probably .. 3 code have upgrade you dct ?

[Evolve Automotive]

Originally Posted by 6ab6ab

272c oxygen sensor, output-stage diagnosis, heater after cat, bank 1
272d oxygen sensor, output-stage diagnosis, heater after cat, bank 2
2b62 servotronic, converter current

the engine light that is on is the service engine soon light , and i had this engine check light before installing the supercharger , and the first 2 first codes about the oxygen sensor i had them before installing supercharger as well

I would start by replacing the faulty 02 sensors and then see how the car adapts to those changes. You do not have a ICV code, but from the first stall video it sounds like that could be the case. I would replace the 02s and see what happens.

[jcolley]

The two Cat related codes are for your post Cat O2 sensors. The heater circuit appears to be shorted. These should not influence engine operation in any way by design, however given it's a possible indication of a short-circuit condition, if the DME is not gracefully handling the overcurrent condition, it may be affecting the voltage supply to the primary cats as well. I don't know if the DME has separate voltage supplies for pre-cat and post-cat O2 sensors.

I would completely unplug both post-cat sensors and see if the drivability improves. Inspect the wiring and connectors for damage as well.

Now that I'm typing this, it's odd that the servotronic circuit is reporting high current as well. I haven't looked at the DME connector pinout on the mss60, but it's possible the pins for the post-cat sensors and the servotronic amplifier are in close proximity to each other on the DME connector. Open the E-box and look for wire damage or signs of water intrusion possibly shorting those 3 voltage supplies to ground.

[whats77inaname]

Originally Posted by Evolve-US

I would start by replacing the faulty 02 sensors and then see how the car adapts to those changes. You do not have a ICV code, but from the first stall video it sounds like that could be the case. I would replace the 02s and see what happens.

Yeah, I'm not sure why you spent $ on a rod bearing change but didn't address the O2 sensors, as well? Starting with a clean slate (i.e., resolving all known issues) is usually a good idea before potentially multiplying them by adding more parts dependent on the malfunctioning parts.

Congratulations on the s/c purchase, though! Hope to see it running properly before too long.

[okusa]

Originally Posted by 6ab6ab

after the installation I uploaded the new Bpm tune and started for the first time I drove it back home then the next day the problems started

Just curious why you would use a BPM tune when ESS is known for their software.

Originally Posted by okusa

Just curious why you would use a BPM tune when ESS is known for their software.

I seen a post whit a 625 owner that told whit BPM car goes much more smoothly than ess software.

[okusa]

Originally Posted by TL866

I seen a post whit a 625 owner that told whit BPM car goes much more smoothly than ess software.

Not so sure about that. However, I do know for a fact that the tune can affect O2 sensors....

[Evolve Automotive]

Originally Posted by okusa

Not so sure about that. However, I do know for a fact that the tune can affect O2 sensors....

This is very true. A tune can effect a 02 sensor. But before we go ahead and try to point at a tune, we should make sure to check what the faults that the OP is having.

[kerrit]

check for vacuum leaks

[BPMSport]

Originally Posted by kerrit

check for vacuum leaks

+1

Definitely recommend smoke testing as per the email sent a few days ago.

We also recommended switching out the injectors and flashing to stock and seeing if the issue persists.

The o2 sensor faults 272C and 272D refer to the heater circuit on the post cat o2 sensors, and are not relevant to the issues at hand. It may have been that your shop started the car with those sensors unplugged, and that's what triggered those faults.

I am 99.9% sure it's a hardware or installation issue. The software in your car is in many other 650's without any issues. My bet would be on a vacuum leak or an ICV issue, but it could be something else.

[6ab6ab]

Originally Posted by Mike Benvo

+1

Definitely recommend smoke testing as per the email sent a few days ago.

We also recommended switching out the injectors and flashing to stock and seeing if the issue persists.

The o2 sensor faults 272C and 272D refer to the heater circuit on the post cat o2 sensors, and are not relevant to the issues at hand. It may have been that your shop started the car with those sensors unplugged, and that's what triggered those faults.

I am 99.9% sure it's a hardware or installation issue. The software in your car is in many other 650's without any issues. My bet would be on a vacuum leak or an ICV issue, but it could be something else.

I went to the shop and requested a smoke test , and sadly they don't know how to preform one , garages here really suck I am still looking for a garage to preform one ? And Mike I noticed when I uploaded the file that brings back the cold start the stalling has decreased and another thing is that it stalls mostly when I am on "D" and just when I am about to movie it stalls , anyways I am going to try solve the issue and do as u suggest

[BzsBimmer]

Instead of a smoke test, ask them for a hookah test

[6ab6ab]

Originally Posted by BzsBimmer

Instead of a smoke test, ask them for a hookah test

Actually gd idea 😂

[BPMSport]

Originally Posted by 6ab6ab

I went to the shop and requested a smoke test , and sadly they don't know how to preform one , garages here really suck I am still looking for a garage to preform one ? And Mike I noticed when I uploaded the file that brings back the cold start the stalling has decreased and another thing is that it stalls mostly when I am on "D" and just when I am about to movie it stalls , anyways I am going to try solve the issue and do as u suggest

With cold start on the Idle speed is higher, so it will be less prone to cutting off if there is a vacuum leak that causes an rpm dip when starting off. I would check all vacuum lines and connections, the boots on the plenum, etc.. Have you checked boost and vacuum?

[Hierlevelz]

Anyone have a copy of the vacuum diagram? This way OP can systematically check all his lines.

[777eThOd*]

Sounds like a big vacuum leak.. Knowing that when you go SC'd you will go through plugs fast and O2 Sensors need to be changed out in between 30k-40k miles... Looking at your mileage you might need to change them... You should run a log and dyno to see whats going on.. Doubt its the BPM tune, Mike has been doing this for years and a lot of SC'd M3's are running his tune and I might soon lol..