7C Checking Fuel Pump Vacuum

1. Connect vacuum gauge to fuel pump inlet line.
2. Disconnect outlet fuel line from fuel pump.
3. Crank engine for at least 10 seconds.
4. If vacuum gauge reads at least 10 inches of vacuum, check for plugged or restricted fuel lines, fuel tank venting and in tank filter.
5. If vacuum gauge does not read at least 10 inches of vacuum, replace fuel pump.