No Power at low revs

[naren512]

Hey Guys,

Hope you are all well.

Been having a power loss issue on my car, 2009 E90 320d. some days the car drives fine, however sometimes in bumper to bumper traffic, it looses complete power. idles fine though. if i come to a stop and take off, with my foot to the floor the car shudders a little crawls off. once it eventually gets to about 2500 rpm it starts picking up some speed, once i get to 3rd gear it starts boosting like a bar out of hell.

whats been done so far is the following:
1) Diesel filter replaced with BMW part
2) Diesel Pump replaced with BMW part
3) MAF sensor replaced with original Bosch part
4) Fuel ekp / epk control module replaced with BMW part

although it is better, the issue is still there and i really have no idea what it could be.

any advice would be greatly appreciated.

 

[yush1]

I suggest a DP and SW.

 

[naren512]

I suggest a DP and SW.

Thanks, just to clarify, by DP do you mean "diesel particulate filter" or "down pipe" and SW being "software"?

many thanks for the advice

 

[yush1]

I suggest a DP and SW.

Thanks, just to clarify, by DP do you mean "diesel particulate filter" or "down pipe" and SW being "software"?

many thanks for the advice

DP means down pipe. Basically removing the catalytic converter.

 

[KiLLRoYza]

Have you perhaps had the codes read? Any errors popping up when this happens?

Although software can sort out many issues like these, it's great to know what actually causes the problems

 

[Jeremy.d]

Get the codes read. That's usually the best place to start.

Also, is it auto or manual?

 

[naren512]

thanks guys,

i have a basic obd scanner and it gave me a p3263 code which ive been told that its a generic code. some searching into it indicates swirlflaps

also the report form the Mech picked up the following:

---

I suggest a DP and SW.

Thanks, just to clarify, by DP do you mean "diesel particulate filter" or "down pipe" and SW being "software"?

many thanks for the advice

DP means down pipe. Basically removing the catalytic converter.

ah i see, i am considering doing that however ive been told that i should do software as well for the sensors?

---

Get the codes read. That's usually the best place to start.

Also, is it auto or manual?

its an auto bud

 

[Nikhil]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

 

[naren512]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

 

[Jeremy.d]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

@yush1 was like...

 

[yush1]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

@yush1 was like...

This wasn't a thumb suck bud. Had a similar issue with a diesel, replaced injectors, pump and everything you could think of but the car kept going into limp mode. After doing the SW and DP cured the problem.

 

[Nikhil]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

 

[naren512]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

@yush1 was like...

This wasn't a thumb suck bud. Had a similar issue with a diesel, replaced injectors, pump and everything you could think of but the car kept going into limp mode. After doing the SW and DP cured the problem.

in all honesty, short of the injectors, this is all i came up with as well. i have a bore scope camera and wanted to try and get a way into the cat to check if its clogged or getting clogged.

at first i was told it was the pump because it is pumping at 3.6 bar instead of 5.7bar. then was told its the mass air flow sensor as the readings are wrong, replaced that. then was told the fuel ekp/epk modue, bought a brand new one from BMW. drove fine for a few day and now back to the same.

with regards to the car. if i remove it, will i need to do software?

 

[Nikhil]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

@yush1 was like...

This wasn't a thumb suck bud. Had a similar issue with a diesel, replaced injectors, pump and everything you could think of but the car kept going into limp mode. After doing the SW and DP cured the problem.

Unless your DPF/ cat is clogged or blocked the DP will add no resolution to the fix. Your CEL was most likely triggered by a failing or failed components, in most instances tuners code out the errors with software which prevents the ecu from putting the car into a safety mode, this does not fix any issues but hides them and fools the ecu into thinking nothing is wrong which in most cases is irresponsible as it will lead to further damage at a later stage.

 

[RAArmstrong]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

Nah dude its LCI if its an 09

 

[Nikhil]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

Nah dude its LCI if its an 09

hmmm ok ive seen 09 but pre lci, must have been registered in 09 but 08 build. but anyway vin will give me the tech details i need.

 

[naren512]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

its the LCI (facelift)
Last 7 of Vin is - NM37638

 

[RAArmstrong]

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

Nah dude its LCI if its an 09

hmmm ok ive seen 09 but pre lci, must have been registered in 09 but 08 build. but anyway vin will give me the tech details i need.

LCI was late 2008 so there are a few 09 reg pre lci's.

 

[Nikhil]

Ok so just had a look, your car has the N47 not N47N, take a look below your intake manifold there will be a large plastic pipe with 4 smaller rubber lines attached to it. Trace each of these lines end to end and check the line for cracks or splits, even if its brittle it should be replaced.

There is also a sensor that sits on your intake manifold located on the side between cylinder 1 and 2, in some instances when the sensor is dirty it will either under read or over read boost pressure resulting in power lag or a drop in power, clean this sensor aswell as the sensor at the top of the cold side boost pipe with some electrical cleaner.

Revert back to use once you’ve completed the above. Please also disconnect the battery when removing the sensors.

---

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

Nah dude its LCI if its an 09

hmmm ok ive seen 09 but pre lci, must have been registered in 09 but 08 build. but anyway vin will give me the tech details i need.

LCI was late 2008 so there are a few 09 reg pre lci's.

from real oem

2004 - 2008 Pre lci

2007 - 2012 Lci

but from what it looks like they only got the N47N engine in 2010

 

[naren512]

Ok so just had a look, your car has the N47 not N47N, take a look below your intake manifold there will be a large plastic pipe with 4 smaller rubber lines attached to it. Trace each of these lines end to end and check the line for cracks or splits, even if its brittle it should be replaced.

There is also a sensor that sits on your intake manifold located on the side between cylinder 1 and 2, in some instances when the sensor is dirty it will either under read or over read boost pressure resulting in power lag or a drop in power, clean this sensor aswell as the sensor at the top of the cold side boost pipe with some electrical cleaner.

Revert back to use once you’ve completed the above. Please also disconnect the battery when removing the sensors.

---

Bud where about are you based? if you are close to Midrand i could possibly take a look and help diagnose the issue. Dont know how the f u c k SW an DP is going to help you fix anything. :hammerhead:

Thank you so much for the offer, i am based in cape town :-(

the other things i came across was that these 320d's apparently came with 2 turbos, a garret and a mitsubishi. from that thread, based in the UK, it said that the actuator on the turbo can cause this and that apparently on the garret it can be replaced however on the mitsubishi you have to replace the whole turbo as the actuator is built into a sealed unit.

on a side note, does anyone know if these cars work of a vacuum? my friend has a '08 polo tdi, stage 1 software, cat delete and straight flow pipe. He experienced a similar issue at cruising speed, in his case it was a small vacuum pipe that ran into the turbo that was damaged.

Damn ok. Your car is pre LCI being an 2009 so it should be vacuum actuated turbo. You won’t pick up a vacuum leak on the error codes if one of the pipes has a slit, my suspicion if you boosting properly after 3rd is a vacuum leak to the turbo actuator or one of the other pipes in your vacuum system as they have a single feed to a vacuum block from the vacuum pump. What’s the mileage on your car and whats the last 7 digits of your vin, would like to check the tech diagrams for your vehicle so I can help troubleshoot properly.

Nah dude its LCI if its an 09

hmmm ok ive seen 09 but pre lci, must have been registered in 09 but 08 build. but anyway vin will give me the tech details i need.

LCI was late 2008 so there are a few 09 reg pre lci's.

from real oem

2004 - 2008 Pre lci

2007 - 2012 Lci

but from what it looks like they only got the N47N engine in 2010

---

I will do and advise. thanks for all the assistance everyone, i really appreciate it. what is the difference between the N47 and N47N? is it just the power difference?