BMW 745i Repair Instructions page 60

Condition Cause
Check
I
Adjust
Engine starts, but stops again
Coolant temperature sensor Switch must be closed when
(continued)
defective
coolant temperature is below
45
0
C (113
0
F)
Hot starting problems
Excessive fuel , i n combustion Press accelerator pedal to full
chamber (flooded) throttle and hold until engine
starts or replace spark plugs
Valves
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Adjust valve play
Ignition timing
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Correct timing
Pressure regulator Vacuum line to pressure regu-
lator or pressure reg. defective
Cold start enrichment does
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Cold start relay, temperature
not switch off time switch
Fuel injectors leak
Repl, a ce fuel injectors as
necessary
Control unit Check with BMW SERVICE
TEST unit
,
I' d le speed deviates from
Idle control, screw in throttle Correct setting
specified value
housing maladjusted
Idle fluctuations
Leak in intake system after
Throttle housing, air flow sen-
air flow sensor
sor, intake pipes, hoses
Oil dipstick fit not tight
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Push oill dipstick in tube tightly
Throttle seized
Service throttle or replace
throttle housing
I
CO level incorrect
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Correct CO level
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Throttle bypass valve does not
Replace throttle bypass valve
close
Oil filler cap leaks
Replace cap
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Control unit
Check with BMW SERVICE
TEST unit
"
Fuel consumption excessive
Pressure regulator
Fuel pressure, return line mis-
- compression okay -
routed or squeezed, vacuum
- ignition timing okay -
hose not connected
Temperature time switch
Does not switch off complete-
Iy. so that constant fuel feed
via cold start valve
I
Coolant temperature sensor
Break in power feed wire
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Replace temperature sensor
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Air temperature sensor
Break in power feed wire
Reolace air flow sensor