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Old 03-09-2013, 12:13 PM
BashedBarrique's Avatar
BashedBarrique BashedBarrique is offline
Officially Welcomed to the 'Fest
Location: Carmel Indiana
Join Date: Jan 2013
Posts: 1,870
Mein Auto: 2006 325i
Originally Posted by CT View Post
Step 1) Acquire BT Scan Tool
Step 2) Doesn't afraid of any DIY
I just recently purchased my E90 but I agree with CT. If you are willing to buy the proper diagnostic tools, and learn what your PCU is doing and how it interacts with the various sensors, it still comes down to air, spark and fuel.

Even in the "old days" of analog ignition systems and carburetors you had to understand the various systems and have the proper tools; tach dwell meter, inductive timing light, vacuum gauge etc.

In some ways the newer computerized systems are easier to diagnose since the computer is monitoring and recording most engine and transmission functions. All you need is a tool to read those codes and an understanding of what they mean.

Of course that last part will take some learning on your part but if you are a good DYI'er you'll probably pick it up.
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