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Q5 FSI Carbon Build-up
08-03-2017, 01:37 PM
#351
AudiWorld Senior Member
I can't help but think there's got to be a way for the aftermarket to come up with a solution.It's common among Direct Injection engines of many companies.Seem to me it should be possible to drill/tap into the intake pipes, to install a small injector to wash the intake tract.You'd need a small ecu that can sense engine speed/loading and control the injectors, big issue would being to pull fuel from the Audi injection management but could be done.Now I'm off to create a gofundme site.Just kidding.
Plus it just dawned on me that on the 3.2 s it's also on the exhaust ports.Something to do with Insufficient Egr management ? Shame that Audi addressed the issue by developing a more efficient method for grinding carbon out of the engine. Problem is obviously deep in the engine design and can't be addressed by tinkering outside of the engine.Ah well I drive a diesel so what do I know ?
Plus it just dawned on me that on the 3.2 s it's also on the exhaust ports.Something to do with Insufficient Egr management ? Shame that Audi addressed the issue by developing a more efficient method for grinding carbon out of the engine. Problem is obviously deep in the engine design and can't be addressed by tinkering outside of the engine.Ah well I drive a diesel so what do I know ?
08-03-2017, 06:51 PM
#352
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Hey everyone. New here, I recently got a pre-owned 2011 Q5 2.0T with around 100k miles. Just did the piston and ring job and when the mechanic checked, they said there was no need for carbon cleaning. Which is very surprising given it is a direct injection and the number of miles. I know the previous owner did a lot of highway miles.
What are some ways of continuing preventing the vehicle from carbon buildup?
What are some ways of continuing preventing the vehicle from carbon buildup?
I have a 2009 Q5 with 44k km and no problem at all.
I think driving in S mode really helps too, nothing good about lugging an engine in lower revs, especially if the driver gives it a lot of gas before the revs rise.
So avoid Shell gas and drive it like you stole it.
08-04-2017, 02:12 PM
#353
Top tier gas and carbon buildup correlation?
I've read that gas quality doesn't really do much for carbon reduction.
But isn't Shell part of the top tier gas designation (I was surprised Costco is graded top tier too) meaning it has both quality fuel and detergents? In my area their V Nitro Plus premium is pricier (>50 cents) than other top tier gas premiums or regular gas stations.
But isn't Shell part of the top tier gas designation (I was surprised Costco is graded top tier too) meaning it has both quality fuel and detergents? In my area their V Nitro Plus premium is pricier (>50 cents) than other top tier gas premiums or regular gas stations.
I think the gas has a lot to do with this problem. I don't use Shell because their gas sucks. Seriously, whatever they put in it gives me less power for one thing, avoid at all costs Shell gas.
I have a 2009 Q5 with 44k km and no problem at all.
I think driving in S mode really helps too, nothing good about lugging an engine in lower revs, especially if the driver gives it a lot of gas before the revs rise.
So avoid Shell gas and drive it like you stole it.
I have a 2009 Q5 with 44k km and no problem at all.
I think driving in S mode really helps too, nothing good about lugging an engine in lower revs, especially if the driver gives it a lot of gas before the revs rise.
So avoid Shell gas and drive it like you stole it.
08-06-2017, 11:07 PM
#354
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I've read that gas quality doesn't really do much for carbon reduction.
But isn't Shell part of the top tier gas designation (I was surprised Costco is graded top tier too) meaning it has both quality fuel and detergents? In my area their V Nitro Plus premium is pricier (>50 cents) than other top tier gas premiums or regular gas stations.
But isn't Shell part of the top tier gas designation (I was surprised Costco is graded top tier too) meaning it has both quality fuel and detergents? In my area their V Nitro Plus premium is pricier (>50 cents) than other top tier gas premiums or regular gas stations.
Since then I've avoided the Shell station but I did give them one more chance to test their summer gas. It also sucked.
Do as you may but I will never buy Shell gas again and I suggest you try another brand.
08-07-2017, 07:00 PM
#355
Yeah, I don't fill up with Shell often.
However, why are you putting premium gas in a mini truck? Does it require that high of octane? Could that affect performance since it burns not as easily. Premium works well for the Q5 engines though. I think the US is very strict on gas and everything regardless of brand, comes from the same fuel trucks... the only difference are the "proprietary" additives that are added after the trucks empty their tanks at the gas stations.
However, why are you putting premium gas in a mini truck? Does it require that high of octane? Could that affect performance since it burns not as easily. Premium works well for the Q5 engines though. I think the US is very strict on gas and everything regardless of brand, comes from the same fuel trucks... the only difference are the "proprietary" additives that are added after the trucks empty their tanks at the gas stations.
I've got a 55 HP mini truck and run up a long hill to home every day. After filling with Shell I had to gear down one gear. I actually added some premium and it was a bit better. Next tank was not Shell, it seemed like I'd gained 10 HP, easily climb the long hill in high gear etc.
Since then I've avoided the Shell station but I did give them one more chance to test their summer gas. It also sucked.
Do as you may but I will never buy Shell gas again and I suggest you try another brand.
Since then I've avoided the Shell station but I did give them one more chance to test their summer gas. It also sucked.
Do as you may but I will never buy Shell gas again and I suggest you try another brand.
11-03-2017, 07:23 PM
#356
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Add Mine to the List - 2010 3.2L
Today my low-mileage 2010 3.2L threw the MIL and coughed up the signature codes for Carbon Buildup. :-(
Hopefully this will be covered under the extended warranty. :-)
Friday,03,November,2017,18:36:20:10149
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 17.1.3.0 (x64) HEX-V2 CB: 0.4341.4
Data version: 20170320 DS267.7
Ross-Tech: Home
VIN: WA1LKAFP3AAxxxxxx License Plate: xxxxxxx
Mileage: 83510km-51890mi Repair Order:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Chassis Type: FP (8T0)
Scan: 01 02 03 05 08 09 10 15 16 17 19 36 42 46 52 53 55 56 5F 62
6C 6D 72
VIN: WA1LKAFP3AA101766 Mileage: 83510km-51890miles
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CALB) Labels: 06E-907-559-CAL.clb
Part No SW: 8R0 907 559 G HW: 8F0 907 559 A
Component: 3.2 SIMOS8.2 H06 0004
Revision: --------
Coding: 0121000A190F0121
Shop #: WSC 06192 000 00000
ASAM Dataset: EV_ECM32FSI0218R0907559G 001004
ROD: EV_ECM32FSI.rod
VCID: 44D245B03E19A577491-8010
2 Faults Found:
8931 - Secondary Air Injection System: Bank 1
P0491 00 [237] - Insufficient Flow
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 16
Mileage: 80097 km
Date: 2017.08.18
Time: 15:55:29
Engine speed: 1341.00 /min
Normed load value: 31.0 %
Vehicle speed: 0 km/h
Coolant temperature: 17 °C
Intake air temperature: 15 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 1280 /min
MAF_ENVD: 250.56470 mg/stroke
Coolant temperature (unfiltered): 30.0 °C
Engine: operating status: IS
Battery voltage: 13.101563 V
STATE_LS_ENVD[1]: 2
8932 - Secondary Air Injection System: Bank 2
P0492 00 [237] - Insufficient Flow
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 16
Mileage: 80097 km
Date: 2017.08.18
Time: 15:55:29
Engine speed: 1341.00 /min
Normed load value: 31.0 %
Vehicle speed: 0 km/h
Coolant temperature: 17 °C
Intake air temperature: 15 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 1280 /min
MAF_ENVD: 250.56470 mg/stroke
Coolant temperature (unfiltered): 30.0 °C
Engine: operating status: IS
Battery voltage: 13.101563 V
STATE_LS_ENVD[1]: 2
Readiness: 0000 0000
Hopefully this will be covered under the extended warranty. :-)
Friday,03,November,2017,18:36:20:10149
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 17.1.3.0 (x64) HEX-V2 CB: 0.4341.4
Data version: 20170320 DS267.7
Ross-Tech: Home
VIN: WA1LKAFP3AAxxxxxx License Plate: xxxxxxx
Mileage: 83510km-51890mi Repair Order:
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
Chassis Type: FP (8T0)
Scan: 01 02 03 05 08 09 10 15 16 17 19 36 42 46 52 53 55 56 5F 62
6C 6D 72
VIN: WA1LKAFP3AA101766 Mileage: 83510km-51890miles
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
10-Park/Steer Assist -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: OK 0000
52-Door Elect, Pass. -- Status: OK 0000
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
5F-Information Electr. -- Status: OK 0000
62-Door, Rear Left -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
6D-Trunk Elect. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
-------------------------------------------------------------------------------
Address 01: Engine (J623-CALB) Labels: 06E-907-559-CAL.clb
Part No SW: 8R0 907 559 G HW: 8F0 907 559 A
Component: 3.2 SIMOS8.2 H06 0004
Revision: --------
Coding: 0121000A190F0121
Shop #: WSC 06192 000 00000
ASAM Dataset: EV_ECM32FSI0218R0907559G 001004
ROD: EV_ECM32FSI.rod
VCID: 44D245B03E19A577491-8010
2 Faults Found:
8931 - Secondary Air Injection System: Bank 1
P0491 00 [237] - Insufficient Flow
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 16
Mileage: 80097 km
Date: 2017.08.18
Time: 15:55:29
Engine speed: 1341.00 /min
Normed load value: 31.0 %
Vehicle speed: 0 km/h
Coolant temperature: 17 °C
Intake air temperature: 15 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 1280 /min
MAF_ENVD: 250.56470 mg/stroke
Coolant temperature (unfiltered): 30.0 °C
Engine: operating status: IS
Battery voltage: 13.101563 V
STATE_LS_ENVD[1]: 2
8932 - Secondary Air Injection System: Bank 2
P0492 00 [237] - Insufficient Flow
MIL ON - Confirmed - Tested Since Memory Clear
Freeze Frame:
Fault Status: 00000001
Fault Priority: 2
Fault Frequency: 16
Mileage: 80097 km
Date: 2017.08.18
Time: 15:55:29
Engine speed: 1341.00 /min
Normed load value: 31.0 %
Vehicle speed: 0 km/h
Coolant temperature: 17 °C
Intake air temperature: 15 °C
Ambient air pressure: 1010 mbar
Voltage terminal 30: 13.101 V
Unlearning counter according OBD: 40
Engine speed: actual: 1280 /min
MAF_ENVD: 250.56470 mg/stroke
Coolant temperature (unfiltered): 30.0 °C
Engine: operating status: IS
Battery voltage: 13.101563 V
STATE_LS_ENVD[1]: 2
Readiness: 0000 0000
11-04-2017, 05:10 AM
#357
AudiWorld Senior Member
Funny about shell. When I was a teen and a friend pulled his plugs out of his car and saw how gummed up they were I remember him saying he won't use shell anymore and he started on 76 and never had that problem again. Because of that to this day I've never used shell. Only Chev or Mobil.
BTW, a guy I listen to that does a radio show, jerry reynolds car pro says the best stuff he has ever used is BG 44k fuel system cleaner FWIW.
BTW, a guy I listen to that does a radio show, jerry reynolds car pro says the best stuff he has ever used is BG 44k fuel system cleaner FWIW.
11-20-2017, 01:51 PM
#358
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Join Date: Jan 2013
Location: S.F. Bay Area
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Finally spoke to the AoA technician who did the cleaning. Obviously AoA is very aware of the issue and is paying people like him to remedy it. Anyone with this problem should go to the Audi dealer and make sure they reach out to AoA... I'd be surprised if they didn't cover it whether it's under warranty or not. (Mine wasn't and they still covered it no questions asked.) Good on AoA for this. I get the impression that AoA may formally extend the warranty for this because they have been so lenient with their good will support of it. Keep the pressure on AoA to make sure they do.
As for the procedure, he uses high pressure water. Apparently there's a port on the front of the engine they can open, and another somewhere after the exhaust manifold. They did have to remove the front bumper I'm assuming to access the front port, but it sounded like a lot less hassle than the other methods tried over the years. Certainly a LOT less invasive than dropping the engine. He was very confident this cleans it out really well and says that he's gotten it down to a relatively short (less than half day) routine. He also said he has a prototype high pressure water tool that helps but I didn't get the impression this was required. He mentioned high pressure water systems that the Service shops already have, but stopped short of saying they would be adequate.
As for preventative work, he gave the same advice we read here. High quality (not just high octane) fuel and hotter engine temperatures. Obviously the hotter and cleaner the fuel burns, the less coke buildup. I don't see a lot of posts on the forums from people in the South, Southern California, etc. My guess is you also don't see it as much for people who live in rural areas who have a higher average mph than those in cities. But it really is going to come down to what your individual situations/driving habits are.
As for the procedure, he uses high pressure water. Apparently there's a port on the front of the engine they can open, and another somewhere after the exhaust manifold. They did have to remove the front bumper I'm assuming to access the front port, but it sounded like a lot less hassle than the other methods tried over the years. Certainly a LOT less invasive than dropping the engine. He was very confident this cleans it out really well and says that he's gotten it down to a relatively short (less than half day) routine. He also said he has a prototype high pressure water tool that helps but I didn't get the impression this was required. He mentioned high pressure water systems that the Service shops already have, but stopped short of saying they would be adequate.
As for preventative work, he gave the same advice we read here. High quality (not just high octane) fuel and hotter engine temperatures. Obviously the hotter and cleaner the fuel burns, the less coke buildup. I don't see a lot of posts on the forums from people in the South, Southern California, etc. My guess is you also don't see it as much for people who live in rural areas who have a higher average mph than those in cities. But it really is going to come down to what your individual situations/driving habits are.
Regards
Scott
07-20-2020, 09:00 AM
#360
AudiWorld Junior Member
Join Date: Oct 2012
Location: Austin, TX
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Looks like it's been a few years since the last post here! I still have my 2010 3.2, and am getting a bit nervous. Haven't had any issues yet, but now that I'm out of the extended warranty period, I'm thinking it might be a good idea to sell it before I have this inevitable issue and have to drop a couple grand on it. Anyone have any new info that should sway my decision one way or another?