Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBMW1993740IL (E32/2) V8-3982CC 4.0L DOHC (M60)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONDIGITAL MOTOR ELECTRONIC (DME)FUNCTIONAL DESCRIPTIONSCOLD START CONTROL
1993 BMW 740iL (E32/2) V8-3982cc 4.0L DOHC (M60)
Cold Start Control
1993 BMW 740iL (E32/2) V8-3982cc 4.0L DOHC (M60)SECTION Cold Start Control
OPERATION
During the start phase, fuel is injected several times for each cylinder group per crankshaft revolution. The quantity of fuel is adapted dependent on the engine temperature and the engine speed.
In addition. the ignition timing is shifted in the retard direction the higher the temperature and the lower the start engine speed.
During the initial period after engine start, the initially injected quantity is reduced depending upon the temperature and engine speed in order to avoid an excessively rich mixture. If start is repeated within one minute, the complete initial quantity is no longer injected.
During the warm-up phase, the injection timing and the ignition timing are correspondingly varied also dependent upon engine speed and temperature.
These measures are intended to ensure a lower fuel consumption, good throttle response and smooth engine operation.
During the start phase, fuel is injected several times for each cylinder group per crankshaft revolution. The quantity of fuel is adapted dependent on the engine temperature and the engine speed.
In addition. the ignition timing is shifted in the retard direction the higher the temperature and the lower the start engine speed.
During the initial period after engine start, the initially injected quantity is reduced depending upon the temperature and engine speed in order to avoid an excessively rich mixture. If start is repeated within one minute, the complete initial quantity is no longer injected.
During the warm-up phase, the injection timing and the ignition timing are correspondingly varied also dependent upon engine speed and temperature.
These measures are intended to ensure a lower fuel consumption, good throttle response and smooth engine operation.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.