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#1
12-14-2015, 10:51 PM
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Sudden rough idle
Diagnostic Report Created by OBD Fusion - OCTech, LLC www.obdsoftware.net Date: 12/14/2015 6:35:46 PM VIN: Not Available Monitor Status Report Name Continuous Available Complete Misfire Yes Yes Yes Fuel System Yes Yes Yes Components Yes Yes Yes Catalyst No Yes No Heated Catalyst No No No Evap System No Yes No Secondary Air System No Yes No AC Refrigerant No No No Oxygen Sensor No Yes No Oxygen Sensor Heater No Yes No EGR System No No No MIL On Number of Stored Codes: 7 Readiness Standard: None This vehicle is not ready for emissions testing. Reason MIL On Stored trouble codes have been detected Number of incomplete tests exceeds the maximum number allowed Trouble Code Report Code Type Status Description P0300 PowerTrain Stored Random/Multiple Cylinder Misfire Detected P1352 PowerTrain Stored Manufacturer Defined P1351 PowerTrain Stored Manufacturer Defined P1342 PowerTrain Stored Manufacturer Defined P1344 PowerTrain Stored Manufacturer Defined P1349 PowerTrain Stored Manufacturer Defined P1347 PowerTrain Stored Manufacturer Defined P0300 PowerTrain Pending Random/Multiple Cylinder Misfire Detected Additional Information PID Description Value Units Mode $01 - Powertrain Diagnostic Data PID Description Value Units SAE 0x03 Fuel system 1 status 8 SAE 0x03 Fuel system 2 status 8 SAE 0x04 Calculated load value 23.92 % SAE 0x05 Engine coolant temperature 177.8 F SAE 0x06 Short term fuel % trim - Bank 1 0 % SAE 0x07 Long term fuel % trim - Bank 1 0 % SAE 0x08 Short term fuel % trim - Bank 2 0 % SAE 0x09 Long term fuel % trim - Bank 2 0 % SAE 0x0C Engine RPM 734 RPM SAE 0x0D Vehicle speed 0 MPH SAE 0x0E Ignition timing advance for #1 cylinder 5 deg SAE 0x0F Intake air temperature 98.6 F SAE 0x10 Mass air flow rate 0.84 lb/min SAE 0x11 Absolute throttle position 0 % SAE 0x12 Commanded secondary air status 4 SAE 0x13 Location of oxygen sensors 51 SAE 0x14 O2 voltage (Bank 1, Sensor 1) 0.02 V SAE 0x14 Short term fuel trim (Bank 1, Sensor 1) 0 % SAE 0x15 O2 voltage (Bank 1, Sensor 2) 0.02 V SAE 0x15 Short term fuel trim (Bank 1, Sensor 2) 99.22 % SAE 0x18 O2 voltage (Bank 2, Sensor 1) 0.29 V SAE 0x18 Short term fuel trim (Bank 2, Sensor 1) 0 % SAE 0x19 O2 voltage (Bank 2, Sensor 2) 0 V SAE 0x19 Short term fuel trim (Bank 2, Sensor 2) 99.22 % SAE 0x1C OBD requirements to which vehicle or engine is certified 1 Aux 0x00 Input voltage read by the scan tool 12.6 V Mode $02 - Freeze Frame PID Description Value Units 0x02 Freeze frame DTC P1349 0x03 Fuel system 1 status 4 0x03 Fuel system 2 status 4 0x03 Fuel system 1 status 4 0x03 Fuel system 2 status 4 0x04 Calculated load value 19.61 % 0x05 Engine coolant temperature 138.2 F 0x06 Short term fuel % trim - Bank 1 0 % 0x07 Long term fuel % trim - Bank 1 4.69 % 0x08 Short term fuel % trim - Bank 2 0 % 0x09 Long term fuel % trim - Bank 2 2.34 % 0x0C Engine RPM 631 RPM 0x0D Vehicle speed 2.49 MPH Mode $05 - Oxygen Sensors Sensor Available Bank 1 - Sensor 1 Yes Bank 1 - Sensor 2 Yes Bank 1 - Sensor 3 No Bank 1 - Sensor 4 No Bank 2 - Sensor 1 Yes Bank 2 - Sensor 2 Yes Bank 2 - Sensor 3 No Bank 2 - Sensor 4 No Sensor Description Value Minimum Maximum Units Result Bank 1 - Sensor 1 TID $01 - Rich to lean sensor threshold voltage (constant) 0.45 0 1.275 V Incomplete Bank 1 - Sensor 1 TID $02 - Lean to rich sensor threshold voltage (constant) 0.45 0 1.275 V Incomplete Bank 1 - Sensor 1 TID $03 - Low sensor voltage for switch time calculation(constant) 0 0 1.275 V Incomplete Bank 1 - Sensor 1 TID $04 - High sensor voltage for switch time calculation(constant) 0 0 1.275 V Incomplete Bank 1 - Sensor 1 TID $05 - Rich to lean sensor switch time (calculated) 0 0 0 sec Incomplete Bank 1 - Sensor 1 TID $06 - Lean to rich sensor switch time (calculated) 0 0 0 sec Incomplete Bank 1 - Sensor 1 TID $09 - Time between sensor transitions (calculated) 0 0 0 sec Incomplete Bank 2 - Sensor 1 TID $01 - Rich to lean sensor threshold voltage (constant) 0.45 0 1.275 V Incomplete Bank 2 - Sensor 1 TID $02 - Lean to rich sensor threshold voltage (constant) 0.45 0 1.275 V Incomplete Bank 2 - Sensor 1 TID $03 - Low sensor voltage for switch time calculation(constant) 0 0 1.275 V Incomplete Bank 2 - Sensor 1 TID $04 - High sensor voltage for switch time calculation(constant) 0 0 1.275 V Incomplete Bank 2 - Sensor 1 TID $05 - Rich to lean sensor switch time (calculated) 0 0 0 sec Incomplete Bank 2 - Sensor 1 TID $06 - Lean to rich sensor switch time (calculated) 0 0 0 sec Incomplete Bank 2 - Sensor 1 TID $09 - Time between sensor transitions (calculated) 0 0 0 sec Incomplete Mode $06 - On-Board Monitoring Component Description Value Minimum Maximum Units Result Component Id $01 TID $01 - Manufacturer Defined 0 N/A 65535 Pass Component Id $02 TID $01 - Manufacturer Defined 0 N/A 65535 Pass Component Id $01 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $02 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $03 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $04 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $09 TID $02 - Manufacturer Defined 146 104 N/A Pass Component Id $05 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $06 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $07 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $08 TID $02 - Manufacturer Defined 0 N/A 65535 Pass Component Id $0A TID $02 - Manufacturer Defined 106 104 N/A Pass Component Id $05 TID $03 - Manufacturer Defined 65535 0 N/A Pass Component Id $06 TID $03 - Manufacturer Defined 65535 0 N/A Pass Component Id $07 TID $05 - Manufacturer Defined 10246 3932 N/A Pass Component Id $08 TID $05 - Manufacturer Defined 65535 0 N/A Pass Component Id $09 TID $05 - Manufacturer Defined 0 N/A 65535 Pass Component Id $12 TID $05 - Manufacturer Defined 65535 0 N/A Pass Component Id $13 TID $05 - Manufacturer Defined 0 N/A 65535 Pass Component Id $14 TID $05 - Manufacturer Defined 0 N/A 65535 Pass Component Id $15 TID $05 - Manufacturer Defined 65535 0 N/A Pass Component Id $16 TID $05 - Manufacturer Defined 65535 0 N/A Pass Component Id $17 TID $05 - Manufacturer Defined 0 N/A 255 Pass Component Id $18 TID $05 - Manufacturer Defined 65535 0 N/A Pass Component Id $01 TID $06 - Manufacturer Defined 255 N/A 2400 Pass Component Id $02 TID $06 - Manufacturer Defined 0 N/A 65535 Pass Component Id $03 TID $06 - Manufacturer Defined 58 N/A 2400 Pass Component Id $04 TID $06 - Manufacturer Defined 205 N/A 2400 Pass Mode $09 - Vehicle Information General Information Description Value Vehicle Identification Number Not Available Calibration ID - $12 7519308 Calibration ID - $12 7522349 Calibration ID - $18 7597518 Calibration Verification Number - $12 00002165 Calibration Verification Number - $12 000044E0 Calibration Verification Number - $18 00000387 Calibration Verification Number - $18 0000F8E5 
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#2
12-14-2015, 11:15 PM
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P0300 is MULTIPLE RANDOM MISFIRE, the P13nn codes are specific cylinder misfires.
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#3
12-14-2015, 11:27 PM
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Rough idle can be attributed to the DME shutting down the injector(s) due to a misfire in cylinder(s). Your MAF reading of .84 lb/min is equivalent to 6.35 g/s at idle. I think you MAF is over reporting the amount of air that is flowing through the MAF to the DME. You can try cleaning the MAF.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD Last edited by upallnight; 12-14-2015 at 11:34 PM.
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#4
12-14-2015, 11:49 PM
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Quote:
The plugs are also fairly new, probably 8k on them. Coils I don't know. But this also seems more like vacuum than ignition.
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#5
12-15-2015, 12:06 AM
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Quote:
Perhaps it's time for a new MAF. My advice would be to skip the cheap wing wang MAF from eBay and Amazon and buy a Siemens MAF.
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2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD Last edited by upallnight; 12-15-2015 at 12:19 AM.
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#6
12-15-2015, 01:15 AM
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MAF is not likely the issue. MAF's do not over report when they get dirty, they under report. MAF's also under report as they degrade and age.
The MAF reading is a bit high, however, I would not take the single instance of the MAF reading as a benchmark at this point. If the MAF was really over reporting, then I would expect the Fuel Trims to be fairly Negative. You really need to change the MAF reading from lb/min to g/s. This is VERY easy. Go Settings, Units, Airflow and change from lb/min to g/s. Forget about the MAF for now, there are plenty of other things to focus on. A few things seem to be out of line. Pay very careful to the Fuel System Status information. For the report, the Fuel System Status was at 8 for both Banks. 8 = Open loop due to system failure For the Freeze Frame, the Fuel System Status was at 4, unclear if this was due to off throttle deceleration or why it was at 4 for the Freeze Frame. 4 = Open loop due to engine load OR fuel cut due to deceleration Input voltage read by the scan tool 12.6 V. This could be a problem, this could be an offset reading due to a cheap OBDII interface that has a poor Voltage detection circuit. I would verify the charging Voltage on the vehicle and make sure there is not a basic charging problem or a bad engine to body ground. You may find the OBDII interface is just reading low and you may need to add a correction factor. Fuel Trims do not look too bad with the initial snap shot of data. I do not think there is a vacuum leak problem at this time with the snap shot of data, but maybe my mind with change when I can see some Logs. However, the Bank #1 O2 sensor Voltages look very low from the Report snap shot. This means at least Bank #1 was very Lean when the Report was generated. But again, this is just a snap shot so the data may be a bit misleading. I really doubt this problem is due to ignition coils, but is there any chance you have had a lot of rain or run the vehicle through a car wash? Possible bad fuel? Fuel pump failing and going soft is also a very common problem on BMW's. E46 have a big problem with this, I do not have the data for the E53, they may also run a Piersburg pump which may be slightly more robust than the Siemens/VDO pumps. If the vehicle has 1/4 tank this is a common level where driveability problems start of the fuel pump is soft. You could try to use the Hidden OBC Menu and verify the fuel level in both sides of the fuel tank. Below 1/2 tank the drivers/left side should typically be empty and never have more fuel than the passenger/right side. In the short term if the fuel tank is at 1/4 level, add about 5 more gallons and see how the vehicle runs. If you could post up a few Logs this would be helpful and allow me to see more than just a snap shot. OBDFusion will Logs while the App is connected to the vehicle. This info may be a bit dated, some of the Menus or Tabs may be different, however, this is what you need to do for setting up Logging. First change the MAF reading from Pounds/Min to Grams/Sec, stupid EASY. Settings, Units, Airflow, choose g/s. Temp sometimes can be more useful in C vs F, but no so critical. Settings, Log Setup then set the following: Logging Enabled - checked Logging Trigger - choose Trigger at a fixed sample time Sample Time - choose 1000 msec Log GPS Items - suggest you un-select it as to not advertise where you live Select Items to Log - This varies a bit for each car. But here is a list I like to see: Fuel - do not check any of these 3 items SAE PID's: Fuel system 1 status Fuel system 2 status Calculated load value Engine coolant temperature Short term fuel % trim - Bank 1 Long term fuel % trim - Bank 1 Short term fuel % trim - Bank 2 Long term fuel % trim - Bank 2 Engine RPM Vehicle speed Ignition timing advance for #1 cylinder Intake air temperature Mass air flow rate O2 Voltage (Bank 1, Sensor 1) - not all cars have this O2 Voltage (Bank 1, Sensor 2) - not all cars have this O2 Voltage (Bank 2, Sensor 1) O2 Voltage (Bank 2, Sensor 2) O2 sensor Voltage wide range (Bank 1, Sensor 1) - not all cars have this O2 sensor Voltage wide range (Bank 2, Sensor 1) - not all cars have this Input Voltage read by the scan tool Before you clear codes, get the Freeze Frame data and email or save the screen shot if this is an option. Freeze Frame data saves about 20+ questions as to what is going on. Then make the following Logs: 4 minutes cold start letting the engine idle, do not drive or touch the throttle. Make sure the App is connected to the vehicle before you start the engine. Usually you need to turn the ignition on but do not start the engine, the Connect the App. Once the App is connected and sees the OBDII data stream start the engine. 4 minutes warm idle in Park or Neutral. 3-4 minutes steady highway cruise on as flat a surface as you can find. Cruise control is nice to use if possible. 45-65 range. Logs will be found under Logs, Files and will be listed by Date and Time. I need the .CSV files to be Shared. You can set up a DropBox Free account and OBDFusion can seamlessly upload the chosen Log files to DropBox. You can then log into your DropBox account and choose the file, select Share, then copy and paste the Share URL back into the thread here and I can then access the Logs and look a the data in more detail. NOTE ON SETTING UP DROPBOX. You will need to set up a DropBox Free account using your computer. Use a Login Name, typically your email address, the choose a Password. You will add these into the OBDFusion App under Settings, DropBox. When setting up your DropBox account on your computer. DO NOT DOWNLOAD AND INSTALL THE DROPBOX SOFTWARE. IT IS NOT NEEDED AND IT WILL CAUSE SOME PROBLEMS TRYING TO SYNC FILES FROM YOUR COMPUTER TO DROPBOX AND QUICKLY FILL UP YOUR DROPBOX FREE ACCOUNT. IT CAN BE MANAGED, BUT JUST DO NOT INSTALL THE DROPBOX SOFTWARE, IT IS NOT NEEDED. When setting up DropBox, after you enter your Password and DropBox prompts you to download their software, just hit the Back browser arrow and you will then be in your newly created account.
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2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.
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#7
12-15-2015, 07:53 AM
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Quote:
I know you live in Kalifornia, but was it that hot that the sensor is reading 98.6F?
__________________
2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD
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#8
12-15-2015, 08:26 AM
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Yes, IAT is high, but since this is a single snap shot, even though the engine was not fully warmed up, without knowing if the engine was in cool down with heat soak or cold start it is really hard to know for sure what is going on.
This is why the 4 minute Logs are so critical because you will be able to see the absolute and trend values. One of the benchmarks for IAT is to see what value is presented first thing in the morning before the engine is started and compare it to the engine temperature, it should be pretty close. Not sure if the IAT terminals in the connector are loose what will happen with the IAT valve, but again, this is where the Log files help get an understanding as to what is really going on. Single point snapshot data is helpful but it does not give a bigger picture point of view.
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2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.
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#9
12-15-2015, 08:39 AM
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Quote:
__________________
2006 Infiniti G35 2001 BMW 3.0I E53 X5 Build date 08/2000 SOLD Lotus Europa 1970 Destroyed by fire Lotus Europa 1970 S2 Renault Powered Lotus Type 52 1970 Twincam Webers Powered PORSCHE 911 Targa 1982 The Garage Queen Audi Avant donated to Kars for Kids BMW 525IT Sold Audi 4000CS Quattro Sold Jensen Healey Lotus Powered Sold Opel 1900 Sold Triumph Spitfire 1971 Sold Triumph Spitfire 1968 Sold Plymouth "Cuda" 340 Six pack SOLD
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#10
12-15-2015, 09:22 AM
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Quote:
Fuel System Status 8 is not a good think, typical engines that are running correctly only have Fuel System Status 1 & 2 and occasionally 4 during deceleration with fuel cut off. Again, this is why Logs would be helpful to compare Cold Start against Warm Idle and Steady Cruise. Often I see Fuel System Status 8 during cold start when there is an extremely Lean condition where the fuel control system is not able to see the O2 sensor respond to changed int he fuel control. Logs will give MUCH more insight to what may be going on here. In the back of my mind I am thinking fuel starvation duel to a soft fuel pump, but I need more info to include what the current vehicle fuel level is.
__________________
2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.
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