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|5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)|
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| Originally posted by 325isBaby@Oct 7 2004, 05:03 AM |
Sounds to me as though the Ambiant Air Temp Sensor has died...when the signal goes away the DME assumes a "fail safe" programed value...at the coldest reading it will affect how much fuel is being dumped into the cyliders and what kind of timing you are running.* Hopefully you find this information helpful.
| Originally posted by 540i@Oct 8 2004, 04:44 PM |
Thanks for your help. I kinda figured that it was a warning system for ice / black ice, but it's annoying to hear when it's 55+ degrees outside and it displays -30 on the display. The car runs great. Every now and again it acts up and starts dumping a lot of fuel and hunting and surging. I didn't know if the engine dumping extra fuel every now and again was directly related to the Ambient Air Temperature sending a bogus reading to the computer.
I appreciate your help on the location as well. I can only get chiltons manuals in German over here. I've looked online for them, but I can't seem to find a Chiltons manual for a 540i. I found a sender online for the 525i, and it appears to have the same pin out / functions as mine. It's $30 dollars. Does that sound about right for this type of part?
Thanks again for the awesome information.
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