Volume Test: Mechanical
- Check fuel supply to verify sufficient gasoline in the tank. Disconnect ignition wire from distributor so that engine will not start.
- Separate fuel line at carburetor inlet fitting. Install a piece of fuel resistant hose over the end of fuel line. Place end of hose into a gasoline container.
- Crank engine to activate fuel pump. The amount of fuel pumped will vary according to each manufacturer. The average pump output should be about one pint in 30 seconds.
- If little or no gasoline flows from hose, check fuel lines or gasoline tank filter for restrictions or leaks. If lines and filter are clear, pump is defective and must be replaced.
Courtesy of GENERAL MOTORS CORP.