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01-07-2024, 08:16 PM | #89 | |
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01-18-2024, 10:02 AM | #91 |
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01-18-2024, 03:45 PM | #92 |
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01-18-2024, 05:13 PM | #93 |
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01-23-2024, 12:25 PM | #94 |
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I replaced it a few minutes ago. Been running it in the garage for several minutes, but expectedly the CEL is still lit. What are your recommendations to see if it worked? Driving is not an option at this point as the weather is terrible (salt and chemicals on the road and it's snowing). Should I clear the code w OBD2 or ISTA? If so, then what?
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01-23-2024, 01:14 PM | #96 |
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Will do. In order to see the trigger code what would happen? CEL comes back? CEL took a while to come back when I cleared it before, so I'm assuming a trigger code is something else?
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01-23-2024, 05:14 PM | #97 |
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Same code came back, mixture adaptation (fuel-air mixture too lean), but there's also this "energy diagnosis", or "power management: Remote software upgrade deactivated due to aging battery". So I am wondering if I should start with getting a new battery and throwing it in there, I am going to return this. 02 sensor and use that money toward a new battery.
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01-24-2024, 10:29 AM | #99 |
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Pretty sure that battery is not an issue here as it is only a safeguard measure not to strain potentially old battery. I think that this entry only takes into account battery registration date. You can run service module "energy diagnosis" to see what is says there.
There arent too many scenarios that can drive turbo engine lean. Usually if there is an intake leak then you would end up with rich mixture issues as intake is pressurised not under vacuum like naturally aspirated engines. If electronic probes check out, and I'm not saying they do, then I would suspect fuel delivery. You need to play around with ISTA and live data to see where exactly is the discrepancy stemming from. |
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01-26-2024, 09:52 AM | #100 | |
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01-26-2024, 06:53 PM | #101 | |
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If low pressure and high pressure systems are operating within normal pressures across the whole power band (not just idling!), then pressure buildup systems are not the issue. You can narrow your search considerably by making sure that sensors are showing right data. If you find one that doesn't look right, then you can go upstream from there. There is also Expert Mode in ISTA which can plot and record different values when vehicle is driven. |
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01-28-2024, 04:20 PM | #102 | |
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This video was something I saw previously, and was also posted by someone else here, maybe you. I guess I can check the lambda's by searching "lambda", and also search other relevant parts that I need to test like maybe the fuel injectors and such. Maybe you can help me put a list together for values I can test. Last edited by 750iClown; 01-28-2024 at 04:30 PM.. |
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01-30-2024, 07:14 AM | #103 | |
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If you really want to to proper job about it then I would advise to read that document and then put aside some 5 hours of your time and spend it on sitting in your car and just playing around with ISTA, seeing all its functions and what it can do. There are no free lunches in this world and if you dont want to pay the mechanic then you have to pay with your own time to get to know the engine you are working on and then work on it. I'm here to help, but I can only provide approximate guidance as I dont have your engine, so ECU specific functions and values are somewhat different to yours and not cross compatible for comparison. Other than teleconferencing the diagnostics session, that is the best I can do. Now that you are N63 guru, let's get to troubleshooting. I would start with looking all the sensor data values. MAF, intake air temps, intake manifold pressures, exhaust pressures and temperatures, fuel pressures, cylinder combustion pressures, O2 sensors, cam and crank position sensors. Basically I would check all electronic feedback against known good values because that requires zero disassembly and will narrow down or even pinpoint your area of diagnosis. You even have two banks, with one presumably running correct, which makes for a good data reference point. If you find a probe that reports data outside of what it should or is otherwise anomalous, then your issue is likely upstream from that probe, or the probe itself. Again, search narrowed. If everything on the sensor side checks out then I would go on by extracting the injectors and send them to testing and cleaning. While at it, I would do cylinder compression and leakdown tests to rule out any compression losses and leaky valves. Water in intake, rust on valve collars, lean running ...... you know, anything is possible so we have to work with what we find. Also as part of mechanical diagnosis I would do smoke test on intake and exhaust run to make sure all is good there. Of course also inspect the spark plugs to see what story they tell and which cylinders run bad. Perhaps get a good look of intake runs with borescope, clean the valves if necessary. At that point, you should have your problem well covered. If not then .... well, lets get to it when we get to it. Last edited by Raimo5; 01-30-2024 at 08:45 AM.. |
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02-03-2024, 02:33 PM | #104 | |
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I need to find where ilI can test all those other items you mentioned. I only ran the tests available to me as part of the "Mixture Adaptation" test plan. Maybe I'll need to specifically search out the tests for all those items you mentioned. For example, I saw a video where the person searched up "lambda" in text search, and then ran the O2 sensor tests to get those readings. Thoughts? Last edited by 750iClown; 02-03-2024 at 04:32 PM.. |
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02-03-2024, 07:54 PM | #105 | |
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02-03-2024, 09:00 PM | #106 | |
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Someone just posted a screen shot asking what to do next in ISTA, and the screenshot actually stated the next troubleshooting steps. The power of ISTA is the Test Plans for each code (and the wiring diagrams). |
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02-04-2024, 03:40 PM | #107 | |
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02-04-2024, 04:24 PM | #108 | |
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Keep us posted... |
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02-12-2024, 10:40 AM | #109 | |
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Before I do that however, I'm going to do a smoke test on both banks. Thoughts? Last edited by 750iClown; 02-12-2024 at 11:36 AM.. |
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02-12-2024, 09:28 PM | #110 | |
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Seriously, I do hope to hear some good news on your issue.... |
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