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12-26-2023, 05:41 PM | #23 | |
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12-26-2023, 08:11 PM | #25 |
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You'll have to pull the turbo heat shield off and take a shot down the CAT's which should sit pretty close to the firewall to see the post-CAT lambda sensors.
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12-26-2023, 09:27 PM | #26 |
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Thank you!
Thank you. I had a feeling about those being the pre-cat O2 sensors. Is Bank 1 drivers side or passenger side of vehicle? I will see what ISTA says first before deciding to purchase a new O2 sensor. The interface cable for that is coming in on Thursday.
Also, where are the MAF sensors, as well as PCV? Let me know if you know that. |
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12-27-2023, 12:25 PM | #28 |
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Where to download ISTA+ free version?
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12-27-2023, 07:48 PM | #29 | |
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12-27-2023, 08:29 PM | #30 |
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Drives: 2018 Alpina B6 650ix GC
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2018 F06 Alpina B6 650ix GC; Space Grey; Vermillion Red Nappa Leather; Executive; B&O; Driving Assistant 2017 F15 X5 xDrive50i MSport; Glacier Silver Metallic; Black Dakota Leather; Executive; B&O; Driving Assistant; RSE |
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12-29-2023, 11:59 AM | #31 | |
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We're getting somewhere
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- Oxygen sensor before catalytic converter - Hot film air mass meter - Intake pipe pressure sensor - Intake air temperature sensor - Electromotive throttle actuator - Fuel tank vent valve - Camshaft sensor - High-pressure fuel system - Low-pressure fuel system - Valvetronic intake adjuster - Voltage supply sensor system/actuator 5 V - Ethanol sensor (only in E100 vehicles) then says.... Check air intake system for tightness, checking the following components as well at the same time: - Crankcase ventilation - Oil filler cap - Oil dipstick - Tank ventilation system - Brake servo - Cylinder head cover Check exhaust system for leak tightness. Rule out poor fuel grade. Check injectors with the test module for misfiring detection and replace if necessary. Then reset adaptations. Breakdown instruction - The engine operates in its emergency program. - Lack of power. - Rough engine running. Service instruction - Reset mixture adaptation after a repair. https://photos.app.goo.gl/5u1aCZa1cUvF5onk9 https://photos.app.goo.gl/9f5CXtxZzYHfDTYJA https://photos.app.goo.gl/Yq4WWPyZAY1H6ay3A Last edited by 750iClown; 12-29-2023 at 12:05 PM.. |
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12-29-2023, 08:38 PM | #32 |
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750iClown, congratulations on getting ISTA up and running.
Here is the sequence of things I'd do: 1. Clear ALL fault codes. By clearing all codes, the permanent faults should remain, and the number of yellow colored ECU's should be reduced. 2. Post the codes that remain 3. In service measurement = while running the engine, make measurements and compare those measurements with ISTA's documentation for expected values. Remember, when measuring O2 sensors, the engine must be at operating temperature. Ignore anything before this point. Post voltage values for each lambda sensor (graph would be better). Pre-cat O2's should be a steady voltage below 1V...while your post-cat O2's voltages should be wandering around to support fuel trim...so if the post-cat 02 voltage is steady state, I'd call that bad. check in at this point. |
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12-29-2023, 11:54 PM | #33 | |
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12-30-2023, 09:13 AM | #35 |
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Question, you said...
while your post-cat O2's voltages should be wandering around to support fuel trim...so if the post-cat 02 voltage is steady state, I'd call that bad. Why do you say that would be bad? Wouldn't that indicate a bad post-cat O2 sensor if the voltage is not wandering and indicate a simple replacement of that sensor is needed? |
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12-30-2023, 11:38 AM | #36 | |
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I should have been clearer. If you post-CAT Lambda sensor produces a steady state voltage, it could mean that the sensor is bad...and would set a fuel trim error. |
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12-30-2023, 12:56 PM | #37 | |
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12-30-2023, 01:59 PM | #38 |
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After disconnecting from the vehicle, I am in the house attempting to review the 4 remaining faults, but the operation no longer has them. Do I have to be connected to the vehicle to see them? Why did they disappear? Did I prematurely disconnect the interface cord?
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12-30-2023, 03:01 PM | #39 | |
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12-30-2023, 03:17 PM | #40 | |
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3. In service measurement = while running the engine, make measurements and compare those measurements with ISTA's documentation for expected values. Last edited by 750iClown; 12-30-2023 at 03:30 PM.. |
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12-30-2023, 03:22 PM | #41 |
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12-30-2023, 07:49 PM | #43 |
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If you can give me a step by step instruction on how to get the measurements from my vehicle please do tell. Here are a couple screen grabs from ISTA showing the ideal measurements of the post cat O2 sensor. I just need to know how to set up ISTA to show me my O2 sensor readings while the car is running and hooked up to ISTA. Last edited by 750iClown; 12-30-2023 at 08:40 PM.. |
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12-31-2023, 12:26 AM | #44 | |
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My ISTA+ is an older version, so mine screen grabs may not be exactly like yours. |
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