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What are common fuel pump problems Mercedes 1986 190E?

Common fuel pump problems for the Mercedes 1986 190E include:

1. Clogged fuel filter: A clogged fuel filter can restrict fuel flow to the fuel pump and cause it to overheat and fail.

2. Dirty or corroded fuel lines: Dirty or corroded fuel lines can restrict fuel flow and cause the fuel pump to work harder than necessary, leading to premature failure.

3. Faulty fuel pressure regulator: A faulty fuel pressure regulator can cause incorrect fuel pressure, which can damage the fuel pump and other fuel system components.

4. Electrical issues: Electrical issues such as a faulty fuel pump relay or wiring problems can cause the fuel pump to not receive power and fail to operate.

5. Worn or damaged fuel pump: Over time, the fuel pump can wear out or become damaged due to normal wear and tear or contamination from foreign objects in the fuel.