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      01-14-2013, 02:59 PM   #5
Mike Benvo
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Drives: 08 E90 M3 / 400whp Turbo 7
Join Date: Apr 2008
Location: SoCal

Posts: 4,642
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1990 BMW 735i Turbo  [5.00]
2004 BMW M3  [0.00]
2008 BMW M3  [5.00]
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2B3C - P0308: Misfire with cutoff, cyl. 8 (Cylinder 8 Misfire Detected)

3.3V in miss window for at least 5 ms
(K_AUSS_NS_TIME_MAX) or for entire miss window

1. Check spark plug, interchange with other plug or replace
to localize malfunction.
2. Run compression check.
3. Inspect cylinders to determine whether coolant and engine
oil are entering.

2B49 - P0308: Misfire impairing exhaust emission, cyl. 8

No spark detected in ionic current signal

1. Check spark plug, interchange with other plug or replace
to localize malfunction.
2. Interchange ignition coil with other coil to localize
malfunction, replace as indicated.
3. Check plug and wiring harness to ignition coil.

The other two faults are as a result of one or both of these two main ones.

Hope this helps
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