Complaint: Starting Problems
WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.
- Run engine briefly at idle speed and switch off.
- Note down measured value while engine is stopped.
- Read off measured value again after approx. 20 to 30 minutes while engine is stopped.
Special tool 13 3 010 (hose clamp) is required for the following test.
If the measured value has dropped by more than 0.5 bar:
- Start engine and wait briefly for a stable pressure increase.
- Switch off the engine and immediately pinch off the delivery line just before the pressure gauge with the special tool 13 3 010.
- Note down measured value
- Read off measured value again after approx. 20 to 30 minutes while engine is stopped
If the measured value has now dropped by less than 0.5 bar, the following faults can be present:
- Fault in delivery lines
- Fault in in-tank delivery hose
- Faulty pressure-holding non-return valve in fuel pump
Check components. Replace faulty components.
If the measured value has dropped by more than 0.5 bar again:
- Replace pressure regulator
NOTE:
- All the fuel hoses and hose clips which were detached within the framework of the checks must be replaced.
- Interrogate fault memory of DME control unit. Check stored fault messages. Rectify faults. Now clear the fault memory.