Air Inlet Temp Sensor
Printed From: Bavarian-Board.co.uk - BMW Owners Discussion Forum
Category: Technical & Model Specific Forums
Forum Name: BMW 3 Series
Forum Discription: This forum will deal with any issues on the BMW 3 Series (E21, E30, E36, E46, E90, E91 & E92)
URL: http://www.bavarian-board.co.uk/forum_posts.asp?TID=21268
Printed Date: 22-May-2024 at 17:17
Topic: Air Inlet Temp Sensor
Posted By: DavidParry
Subject: Air Inlet Temp Sensor
Date Posted: 25-August-2005 at 09:08
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Hi all, I have purchased a chip off EBay that plugs into the AIT sensor & "allegedly" fools the EMS into pulling more air in helping breathing & gives more power etc? Should I be If I have been a clown, please feel free to tell me so, and I will not bother installing! If not (!?) would really appreciate it if anyone could tell me which 2 pins of the 4 pins on the AIT cable are not powered? They are numbered 1,2,3,4, but can't find anywhere which is sensor & which are power.... I have a 1999 E36 323i coupe. Would appreciate any help, or to be told not to bother! Thanks Dave ------------- Dave |
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Posted By: speedychuck
Date Posted: 25-August-2005 at 09:24
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I presume you have just bought a resistor... although I could be wrong.
The way these things work is not by pulling more air in, but by fooling the ecu into thinking the air is cooler or hotter than it actually is- meaning it is more or less dense than the ecu thinks. Now, I don't know much about the 323, but I assume like most cars it will run slightly rich as a safety feature and to keep cylinder temps lower (it's these tollerances that superchips take advantage of, along with timing), by fooling the ecu into thinking the air is less dense than it is, it will lean off the mixture theoretically giving you more power- to a point. I come from a turbo'd background ad I have a feeling I've got my cooler and hotter back to front. But you get the general idea. Feel free to correct me if i'm wrong all you technical sorts 
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