Ignition Firing Order - BMW 5251 Service Manual

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Ignition voltage peaks in response to sudden acceleration
load:
1. Normal ignition pattern. Beginning of dying out pattern
is not much higher than ignition voltage peak.
2. Beginning of dying out pattern considerably higher than
ignition voltage peak. Fault in injection system:
Lean fuel mixture
Defective fuel injector
Low compression in cylinder
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Ignition firing order
Normal secondary voltage patterns
(4-cylinder pattern shown).
4
Each ignition coil is mounted above the corresponding spark
plug.
-
Number one cylinder is located at the front on 6-cylinder
models.
Number one cylinder is located at the right (passenger side)
front on V-8 models. Cylinder firing order is shown.
Firing order
M52
-
M52
TU
-
M54 6-cylinder
1-5-3-6-2-4
M62
-
M62
TU
V-8
1-5-4-8-6-3-7-2