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      08-08-2021, 03:48 AM   #1
JaybeM5
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Rough idle after valve stem seal replacement

Hey guys,

I'm after getting my valve stem seals replaced on my 2011 F10 M5. Everything went smoothly until restart. It runs rough with drivetrain error and white smoke from the exhaust. Car was off the road for 8 months because of Covid lockdowns. Hardly fuel gone bad over those 8 months? Errors I'm getting are below. Any help would be greatly appreciated. Thanks.

Code 140001

Combustion misfire, multiple cylinders: injection is switched off

Code 140501

Combustion misfire, cylinder 5: Injection is switched off

Code 140410

Combustion misfire, cylinder 4: detected

Code 140310

Combustion misfire, cylinder 3: detected

Code 140401

Combustion misfire, cylinder 4: Injection is switched off

Code 140301

Combustion misfire, cylinder 3: Injection is switched off

Code 128008

Lambda sensors in front of > Catalyst, assembly: reversed

Code 140210 Misfiring, cylinder 2: detected

Code 140004

Combustion misfire, several cylinders: harmful to the exhaust gas

Code 140404

Misfiring, cylinder 4: harmful to > the exhaust gas

Code 140204 Misfiring, cylinder 2: damaging > the exhaust gas

Code 128008

Lambda sensors in front of > catalyst, assembly: reversed

Code 11A002 High-pressure fuel, plausibility: > pressure too low

Last edited by JaybeM5; 08-08-2021 at 04:09 AM..
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      08-08-2021, 05:08 AM   #2
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Quote:
Originally Posted by JaybeM5 View Post
Hey guys,

Code 11A002 High-pressure fuel, plausibility: > pressure too low
I assume that's your answer.
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      08-08-2021, 07:38 AM   #3
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So faulty hpfp ?
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      08-08-2021, 08:50 PM   #4
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Quote:
Originally Posted by JaybeM5 View Post
So faulty hpfp ?
Yes
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      08-08-2021, 10:48 PM   #5
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Quote:
Originally Posted by JaybeM5 View Post
So faulty hpfp ?
My suggestion is to test it first before replacing, check if its under performing.

For the White smoke check if your coolant levels are dropping.
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      08-09-2021, 01:13 AM   #6
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Quote:
Originally Posted by M6Roar View Post
My suggestion is to test it first before replacing, check if its under performing.

For the White smoke check if your coolant levels are dropping.
How do I check the hpfp ? I can get a second hand hpfp to test from a mate if needs be. The white smoke settles down after a while. Would running lean cause the smoke also ?
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      08-12-2021, 11:57 PM   #7
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Quote:
Originally Posted by JaybeM5 View Post
How do I check the hpfp ? I can get a second hand hpfp to test from a mate if needs be. The white smoke settles down after a while. Would running lean cause the smoke also ?
Sorry for the late response.
U wont notice it as the car will go into limp mode the moments its lean.
I hope your issue is resolved by now.
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      08-13-2021, 07:04 AM   #8
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How did u go?
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      08-19-2021, 07:33 AM   #9
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Quote:
Originally Posted by Craze View Post
How did u go?
Got it plugged into ista+ and it's showing code 152007 now. Still have misfires on cylinder 2 and 3. I changed the coils on those 2 but no change. It will start but won't take any throttle. I changed the relay beside the DME and check fuses but made no difference. I think next step is to remove the coil and injector harness and check it for continuity. Not getting any low fuel pressure now. Spark plugs were black. Cylinder 3 plug was wet. Also fuel coming from bank one exhaust. Got a shock when I thought it was oil first after mixing with the exhaust carbon.
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      08-23-2021, 03:55 AM   #10
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Quote:
Originally Posted by JaybeM5 View Post
Got it plugged into ista+ and it's showing code 152007 now. Still have misfires on cylinder 2 and 3. I changed the coils on those 2 but no change. It will start but won't take any throttle. I changed the relay beside the DME and check fuses but made no difference. I think next step is to remove the coil and injector harness and check it for continuity. Not getting any low fuel pressure now. Spark plugs were black. Cylinder 3 plug was wet. Also fuel coming from bank one exhaust. Got a shock when I thought it was oil first after mixing with the exhaust carbon.
Seems like a leaky injector. Also switch cylinder 2 & 3 coils to different cylinders and see if u still get misfire on the same cylinders or it moved to the new location. or maybe the plug isn't plugged correctly.
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      08-25-2021, 01:28 AM   #11
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Quote:
Originally Posted by M6Roar View Post
Quote:
Originally Posted by JaybeM5 View Post
Got it plugged into ista+ and it's showing code 152007 now. Still have misfires on cylinder 2 and 3. I changed the coils on those 2 but no change. It will start but won't take any throttle. I changed the relay beside the DME and check fuses but made no difference. I think next step is to remove the coil and injector harness and check it for continuity. Not getting any low fuel pressure now. Spark plugs were black. Cylinder 3 plug was wet. Also fuel coming from bank one exhaust. Got a shock when I thought it was oil first after mixing with the exhaust carbon.
Seems like a leaky injector. Also switch cylinder 2 & 3 coils to different cylinders and see if u still get misfire on the same cylinders or it moved to the new location. or maybe the plug isn't plugged correctly.
Went to switch the injectors to see if the faults followed but we were tightening the clamp back on at 13NM when the bolt pulled the threads on the head. tried the second one and same thing happened. Another setback !! Either helicoils or tap for an M8 bolt. The 2 coils on 2 and 3 are brand new also. switched them out when we got the faults first.
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      08-26-2021, 02:58 AM   #12
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Quote:
Originally Posted by JaybeM5 View Post
Went to switch the injectors to see if the faults followed but we were tightening the clamp back on at 13NM when the bolt pulled the threads on the head. tried the second one and same thing happened. Another setback !! Either helicoils or tap for an M8 bolt. The 2 coils on 2 and 3 are brand new also. switched them out when we got the faults first.
Very sorry to hear that, I hope you be able to solve it with minimum cost
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      08-26-2021, 06:01 AM   #13
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*Don't try to remove injectors yourself, unless you're a top in-the-know tech it's not worth it. Pay the steeler to do the job.
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      08-31-2021, 01:52 AM   #14
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Quote:
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*Don't try to remove injectors yourself, unless you're a top in-the-know tech it's not worth it. Pay the steeler to do the job.
I'm not doing this myself. My mechanic is doing it. I was with him when it happened. Just waiting on parts to come in now. The Steelers around me are not used to working on these cars. I've had it with them before and they topped my coolant bottle up to the very top and told me it would auto siphon between the 2 bottles !! I have no confidence in them hence why they are not touching it this time. Also caught them on my tracker joy riding the car doing double the speed limit when it was with them. Never again.
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      09-01-2021, 02:07 AM   #15
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I'm going to buy injectors and was looking at the Bosch 0 261 500 136. Most places say they will fit the M5 but autodoc says they won't. Can anyone confirm if they do ?
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      09-06-2021, 12:58 AM   #16
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Quote:
Originally Posted by JaybeM5 View Post
I'm going to buy injectors and was looking at the Bosch 0 261 500 136. Most places say they will fit the M5 but autodoc says they won't. Can anyone confirm if they do ?
There are two types of injectors EU5 and EU6, You have to check which one your car is running. They both fit but different spray pattern

You cant use EU6 on EU5 and vice versa.

Last edited by M6Roar; 09-06-2021 at 01:06 AM..
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      09-07-2021, 01:29 AM   #17
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Quote:
Originally Posted by M6Roar View Post
Quote:
Originally Posted by JaybeM5 View Post
I'm going to buy injectors and was looking at the Bosch 0 261 500 136. Most places say they will fit the M5 but autodoc says they won't. Can anyone confirm if they do ?
There are two types of injectors EU5 and EU6, You have to check which one your car is running. They both fit but different spray pattern

You cant use EU6 on EU5 and vice versa.
I read that alright so I ordered EU5 which is what came in the car. Now after finding that there is no power to the coils on bank one yet it's only showing misfires on cylinder 2 and 3. list of errors now are:
152007
152008
102A01
1F0526
1F0537
140001
140201
140210
140301
140310
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      09-07-2021, 05:23 AM   #18
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Quote:
Originally Posted by JaybeM5 View Post
I read that alright so I ordered EU5 which is what came in the car. Now after finding that there is no power to the coils on bank one yet it's only showing misfires on cylinder 2 and 3. list of errors now are:
152007
152008
102A01
1F0526
1F0537
140001
140201
140210
140301
140310
Based on your codes. I will check if the battery isn't about to die, then check if the DME connectors are connected properly and not loose. also, the earth connection to both DME's, If all of that if fine I will check the harness it self.
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      09-07-2021, 08:58 AM   #19
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Quote:
Originally Posted by M6Roar View Post
Quote:
Originally Posted by JaybeM5 View Post
I read that alright so I ordered EU5 which is what came in the car. Now after finding that there is no power to the coils on bank one yet it's only showing misfires on cylinder 2 and 3. list of errors now are:
152007
152008
102A01
1F0526
1F0537
140001
140201
140210
140301
140310
Based on your codes. I will check if the battery isn't about to die, then check if the DME connectors are connected properly and not loose. also, the earth connection to both DME's, If all of that if fine I will check the harness it self.
battery was only a year old when the teardown started. have it on trickle charge a week before it was going to be started. I'll get him to check the harness. He checked connections but not continuity. I don't know any good auto electrician to ask to look at it. I found a kill switch in the little compartment beside the steering wheel. found wires tapped into the shed loading relay too so there's some kind of security system in the car from a previous owner. it has never caused me any issues up to now so hard to believe it has anything to do with it.
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      09-07-2021, 09:46 AM   #20
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Quote:
Originally Posted by JaybeM5 View Post
battery was only a year old when the teardown started. have it on trickle charge a week before it was going to be started. I'll get him to check the harness. He checked connections but not continuity. I don't know any good auto electrician to ask to look at it. I found a kill switch in the little compartment beside the steering wheel. found wires tapped into the shed loading relay too so there's some kind of security system in the car from a previous owner. it has never caused me any issues up to now so hard to believe it has anything to do with it.
That is a possibility since your issue is leaning towards the electrical side.

Get a multimeter and test the voltage going to the coils connector. I will try and find you more details from newtis.info because I think pin number 3 in the coils goes to load-shedding relay.

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Load-shedding relay for ignition and fuel injection system.pdf

Last edited by M6Roar; 09-07-2021 at 09:55 AM..
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      09-07-2021, 11:00 AM   #21
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Quote:
Originally Posted by M6Roar View Post
Quote:
Originally Posted by JaybeM5 View Post
battery was only a year old when the teardown started. have it on trickle charge a week before it was going to be started. I'll get him to check the harness. He checked connections but not continuity. I don't know any good auto electrician to ask to look at it. I found a kill switch in the little compartment beside the steering wheel. found wires tapped into the shed loading relay too so there's some kind of security system in the car from a previous owner. it has never caused me any issues up to now so hard to believe it has anything to do with it.
That is a possibility since your issue is leaning towards the electrical side.

Get a multimeter and test the voltage going to the coils connector. I will try and find you more details from newtis.info because I think pin number 3 in the coils goes to load-shedding relay.

Attachment 2690454
Attachment 2690453
Attachment 2690462
That would be brilliant appreciate the help. I have tested coil 1 and 2 and got no voltage 5 and 6 have 12v.
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      09-08-2021, 12:53 AM   #22
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Quote:
Originally Posted by JaybeM5 View Post
That would be brilliant appreciate the help. I have tested coil 1 and 2 and got no voltage 5 and 6 have 12v.
Then you got your answer, glad I could help.
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