Hi all. Im really stuck with this one
My 4.6is has just started idling rough and lost a lot of power. Have been taking a look and it seems the drivers side bank is not running. When you dis-connect the coilpacks on that side the idle / running of the engine does not change at all whereas if you take one from the passenger side bank it starts cutting out so it seems the drivers bank is not running. Exhaust from passenger side is pretty sweet but drivers side is chugging.
Also, when you disconnect the CPS (from previous experience of a 540i) on both sides absolutely nothing changes with the running i.e the engine will just keep on running the same with both cps disconnected.
Any ideas? There are no fault codes stored and no engine management light on?
Thank you
Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.
v8 only running on one bank
Re: v8 only running on one bank
Friend had major issues with an 840ci years ago sounding similar, turns out cat was completely blocked!
Prob not your issue here however. [emoji52]
Sent from my iPhone
Prob not your issue here however. [emoji52]
Sent from my iPhone
Re: v8 only running on one bank
[quote="kjb1"]
Friend had major issues with an 840ci years ago sounding similar, turns out cat was completely blocked!
Prob not your issue here however. [emoji52]
I had a problem with my 840 ci, 4.4 with the cat on one side, it would go into limp mode if I booted it.
Turned out to be a collapsed cat on one side. The fault codes recorded a misfire on all cylinders on the left bank.
Get underneath and bash the cat with your hand, when it's cold. If you can hear the contents rattle inside its goosed. Got a view one from ECP £250 ish, was 2009 though.so could be more expensive now.
Get your codes read though as it could be anything.
I may have dreamt this but someone told me each bank has its own engine management system.
I'm sure some of our resident V8 rs will be more help
Sent from my iPhone
[/quote]
Friend had major issues with an 840ci years ago sounding similar, turns out cat was completely blocked!
Prob not your issue here however. [emoji52]
I had a problem with my 840 ci, 4.4 with the cat on one side, it would go into limp mode if I booted it.
Turned out to be a collapsed cat on one side. The fault codes recorded a misfire on all cylinders on the left bank.
Get underneath and bash the cat with your hand, when it's cold. If you can hear the contents rattle inside its goosed. Got a view one from ECP £250 ish, was 2009 though.so could be more expensive now.
Get your codes read though as it could be anything.
I may have dreamt this but someone told me each bank has its own engine management system.
I'm sure some of our resident V8 rs will be more help
Sent from my iPhone
[/quote]
2011 Kia Sorento KX3 2.2D 60 Plate Auto in black ( mine )
BMW E83 X3. 3.0d M Sport, 2008 in black ( now gone )
BMW E93 330i Convertible Msport 2007. ( Now sold )
VW Golf 2.0 TDI 140 GT 2010 ( now sold )
Now Sold 55 plate, X5, 3.0 D Sport. Silv
BMW E83 X3. 3.0d M Sport, 2008 in black ( now gone )
BMW E93 330i Convertible Msport 2007. ( Now sold )
VW Golf 2.0 TDI 140 GT 2010 ( now sold )
Now Sold 55 plate, X5, 3.0 D Sport. Silv
-
mightymetro
- Newbie
- Posts: 29
- Joined: Sat Nov 29, 2014 4:41 pm
Re: v8 only running on one bank
Sorry for the quick post above, i was in a bit of a rush posting. Here is the full story
The X5 had a quite severe oil leak under the car when i purchased it so i took it to the garage to take a look. The garage took the bottom covers off and the engine cover. When we took the engine cover off the top they noticed that the rear 2 pipes from the CCV had perished and split. The car was still running fine at this point.
As a side note i have covered around 600 miles since purchase and a week after buying it i had this same issue of rough idle / loss of power after a 60mile motorway drive and then coming into a residential area. Got home and looked around but couldnt see anything. Next day all back to normal and never happened again.........until
Garage have just replaced the rocker gaskets and oil leak now cured
Yay
They also replaced the 2 hoses from the CCV that were perished and split with new ones. They have run the car up and said everything was fine, idle perfect and running perfect. I collected the car and on start up noticed it did not fire straight away. Once it fired up it idled a little rough so took it for a run and car is better above 2000rpm but still feels lacking in power. As soon as you come to a junction it will start rough again and stall or try to stall.
I took it back to the garage and they have been taking a look and it seems the drivers side bank is not running. When you dis-connect the coilpacks on that side the idle / running of the engine does not change at all whereas if you take one from the passenger side bank it starts cutting out so it seems the drivers bank is not running. Exhaust from passenger side is pretty sweet but drivers side is chugging.
Also, when you disconnect the CPS (from previous experience of a 540i) on both sides absolutely nothing changes with the running i.e the engine will just keep on running the same with both cps disconnected.
Stored previous codes are 02 sensor fault, excess trim bank 1, excess trim past adjustment or something to that extent. All cleared and there are no faults shown.
Garage have said that they are at a complete loss as to why this is.
Does that make it any clearer????
I have banged the cat and it sounds ok?
The X5 had a quite severe oil leak under the car when i purchased it so i took it to the garage to take a look. The garage took the bottom covers off and the engine cover. When we took the engine cover off the top they noticed that the rear 2 pipes from the CCV had perished and split. The car was still running fine at this point.
As a side note i have covered around 600 miles since purchase and a week after buying it i had this same issue of rough idle / loss of power after a 60mile motorway drive and then coming into a residential area. Got home and looked around but couldnt see anything. Next day all back to normal and never happened again.........until
Garage have just replaced the rocker gaskets and oil leak now cured
YayThey also replaced the 2 hoses from the CCV that were perished and split with new ones. They have run the car up and said everything was fine, idle perfect and running perfect. I collected the car and on start up noticed it did not fire straight away. Once it fired up it idled a little rough so took it for a run and car is better above 2000rpm but still feels lacking in power. As soon as you come to a junction it will start rough again and stall or try to stall.
I took it back to the garage and they have been taking a look and it seems the drivers side bank is not running. When you dis-connect the coilpacks on that side the idle / running of the engine does not change at all whereas if you take one from the passenger side bank it starts cutting out so it seems the drivers bank is not running. Exhaust from passenger side is pretty sweet but drivers side is chugging.
Also, when you disconnect the CPS (from previous experience of a 540i) on both sides absolutely nothing changes with the running i.e the engine will just keep on running the same with both cps disconnected.
Stored previous codes are 02 sensor fault, excess trim bank 1, excess trim past adjustment or something to that extent. All cleared and there are no faults shown.
Garage have said that they are at a complete loss as to why this is.
Does that make it any clearer????
I have banged the cat and it sounds ok?
-
mightymetro
- Newbie
- Posts: 29
- Joined: Sat Nov 29, 2014 4:41 pm
Re: v8 only running on one bank
Just a quick update as i realise how frustrating it can be when there is no closure to a topic.
Turned out to be the Vanos control solenoid for that bank. Replaced with a new one from BMW (about £80) and all sorted............................ until 17 miles later when the cam chain guides broke 
Thanks again for the replies
Turned out to be the Vanos control solenoid for that bank. Replaced with a new one from BMW (about £80) and all sorted
............................ until 17 miles later when the cam chain guides broke Thanks again for the replies
Re: v8 only running on one bank
[quote="mightymetro"]
I have banged the cat and it sounds ok?
[/quote]
Errrrrrr .........
I have banged the cat and it sounds ok?
[/quote]
Errrrrrr .........
Re: v8 only running on one bank
any update here??
Sent from my iPhone
Sent from my iPhone
Re: v8 only running on one bank
[quote="mightymetro"]
Just a quick update as i realise how frustrating it can be when there is no closure to a topic.
Turned out to be the Vanos control solenoid for that bank. Replaced with a new one from BMW (about £80) and all sorted............................ until 17 miles later when the cam chain guides broke
Thanks again for the replies
[/quote]
cam chain guides broke!! oh dear!! hows the car now?
Sent from my iPhone
Just a quick update as i realise how frustrating it can be when there is no closure to a topic.
Turned out to be the Vanos control solenoid for that bank. Replaced with a new one from BMW (about £80) and all sorted
............................ until 17 miles later when the cam chain guides broke Thanks again for the replies
[/quote]
cam chain guides broke!! oh dear!! hows the car now?
Sent from my iPhone