BMW E32 fuel pump: engine stalls or gets no fuel
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E32 suddenly stalls as if out of fuel - is the fuel pump faulty?
Often it is. A pump that sticks intermittently makes the engine stall and run poorly. Replacing the pump fixes the fault. Tapping may make the pump work for a while, but a new pump is more reliable than a refurbished one.
How are the E32 fuel pumps tested?
1. Check the pump fuses and the two relays in the engine bay. 2. Measure the voltage at the pump connector behind the boot cover. 3. Disconnect the supply hose and see whether fuel comes out. 4. If needed, connect the pump directly to the battery and test that it works.
What if no fuel reaches one side of the E32 engine?
Disconnect the supply hose at the injector rail and see whether fuel comes out. If it does not, the cause is usually the pump. A dirty fuel filter can also weaken the supply.
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