Air Intake Temperature Sensor.... - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 03-21-2006, 04:10 AM
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Air Intake Temperature Sensor....

Hi Guys, wonder if you can help. About 3 weeks ago I had an issue with my car whereby when you start it the revs would go to about 2k then drop to below 300rpm and fluctuate until a steady idle is achieved. I took the car to a BMW Stealership and they ran a diagnostic check on the car.

It came back saying that the Air intake temperature was faulty. BMW traced the problem from the ECU back the to the sensor and found corrosion, they cleaned the connection up and all was ok… Until now, it’s playing up again. I wanted to check the sensor myself but I have no idea where to look for it, some article around the net have suggested it’s built into the MAF.

The car is a 94 318is with the M42 engine…

Any Help would be very much appreciated.

Thanks..
Andy
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#2 (permalink) Old 03-21-2006, 04:29 AM
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i have the same problem.
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#3 (permalink) Old 03-21-2006, 04:43 AM
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It's inside the MAF, when you open the valve inside the MAF you should shee a small plastic-like pin, on the upper side in the middle.

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#4 (permalink) Old 03-21-2006, 05:15 AM
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Thanks for the quick response, can i change the sensor or will it need a whole new MAF? Am gonna clean the ICV this weekend, when the car is at idle it feels a little rough although the revs seem fine. Any Ideas?
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#5 (permalink) Old 03-21-2006, 05:27 AM
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Use WD40 or some brake cleaner. There is not so much to clean of the sensor, maybe some WD40 or brake cleaner also would help there.

Otherwise there is no other option then changing the MAF.

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