BMW 745i Repair Instructions page 18

Accelerate car slowly in driving range "2" until reaching a road speed of 80 km/h (50 mph).
IMPORTANT! For safety's sake only carry out this test in driving range "2".
Accelerate with throttle "wide open" after a short distance at a constant 80 km/h (50 mph).
Note the charge pressure at 4000 ... 4500 rpm.
Compare the measured value with the charge pressure graph.
The measured pressure must be within the specified tolerance range.
Refer to "Troubleshooting" when measured value deviates.
22
Charge Pressure Graph
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0.7
t----+------r----+------+-----I
1
~6 I----+-~~~~+------.:j
f~s I r ----+----~----_+~~~~~~-~
0,4
L -_ _ _ _ .L..... _ _ _
~
_ _ _ _
....J.. _ _ _
-L _____ .......:J
1000 2000
1O00 4000
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