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Add a resistor of variable pot to the exhaust pressure sensor.
18-08-2022, 12:58 PM,
Post: #1
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Add a resistor of variable pot to the exhaust pressure sensor.
I like things on my car to work as designed, I hate poor quality control and it seems this is the problem I'm faced with DPF pressure sensors. I'm now waiting got a 2nd one from BMW as the one they sent read 4mb without being connected, just ambient so it should read 0mb. I've tried a pair of Febi, they were even higher readings.
Mines drifted to a negative value, only a little but as soon as it drops below 0millibar it reads -8192 and will log an error. Does anyone know what I would need to connect to the loom and to what wires so I can tweak it to zero? This is the newtis diagram. Thanks. |
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18-08-2022, 13:08 PM,
Post: #2
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RE: Add a resistor of variable pot to the exhaust pressure sensor.
I don't understand where do you see a problem here. DDE allows +-50mbar relative to ambient without any problem. These are NOT precision scientific instruments. And they are not supposed to be. Just merely a VERY CRUDE sensor to detect clogged DPF.
IMHO 4mbar reading on unconnected sensor is actually VERY GOOD. |
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18-08-2022, 13:10 PM,
Post: #3
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RE: Add a resistor of variable pot to the exhaust pressure sensor.
(18-08-2022, 13:08 PM)Node Wrote: I don't understand where do you see a problem here. DDE allows +-50mbar relative to ambient without any problem. These are NOT precision scientific instruments. And they are not supposed to be. Just merely a VERY CRUDE sensor to detect clogged DPF. Duly noted, I'll see what the net one reads and go from there. |
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