08-18-2022, 03:20 PM | #1 |
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Expected air mass values 320d
Hey there,
Recently I've been feeling like im in limp mode but I still have full power say for example il be in 3rd and on usual occasions when I put foot down the power is strong and now I have a slight delay I've noticed causing me to down shift, I've been driving for 10 years and have only ever driven diesels so its not a case of not knowing when to shift properly as its most deffo not that🤣 decided to have a look at live values on bimmertool and the expected values as you can see are well off and the others are not far off expected , now I've been saying to myself it feels like I have a slight air leak or something and then the air mass is like this so maybe they are related? Anyone else got an adapter to try out see what values you get and we can compare ? BTW I used a enet cable to do the scan.. |
02-08-2024, 08:18 AM | #5 |
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unfortunately no.. car is still horrible to drive just avoided driving it.
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speedbirdblack19.00 |
03-24-2024, 04:02 AM | #7 | |
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Drives: BMW F30 320d
Join Date: Dec 2023
Location: Bangkok, Thailand
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And #1 doesn’t hurt either. Just pop it out and spray it with MAF cleaner. Do the same for MAP too just in case. |
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04-05-2024, 06:04 AM | #8 |
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Im having same issue. Although i suspect a bad o2 sensor can cause this as i get same expected as you on MAF but my o2 sensor live data shows 0.95V (95,0 mV as it shows in bimmertool) constant which is too high. Im not sure if they relate to each other. I pulled out my o2 sensor but still show 0.95V so im guessing wires shorted somewhere or maybe bad ECU. Check what your lamba/02 values are.
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10' 120d Stage 2 250 hp & 500 nm
18' 320d Stage 1 235 hp & 460 nm |
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04-05-2024, 06:07 AM | #9 |
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also worth mentioning. My car differs everytime on each startup. The 1600 mg/stk still stays but the power output is very different. I can star, it drives wonderful, park up and start it 5 mins later and i feel a decrease, park up and start it once again and it drives well. It just varies all the time. I really suspect that it has to do with what voltage my 02 sensor sits at. Sometimes it drops to 0.87V and i feel the car is more responsive etc.
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04-05-2024, 10:02 AM | #13 |
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The OP's screenshot shows a huge mis-match between expected vs actual MAF reading. This could be caused by anything that influences Air/Fuel ratio e.g. MAP/MAF/Lambda/EGR Sensor or EGR/PCV/Inlet pipework.
Do some logging against those sensors and plot a graph of Expected (also known as 'Setpoint') versus actual values. One way to test is to unplug 1 sensor at a time and see if the car starts behaving. The ECU will have a set of defaults for many sensors that will work for period before throwing an EML or Limp mode. |
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