Fuel System Checks
WARNING: This page does not describe the selected car, but rather 20 other vehicles, including the 1994 GMC Yukon, 1994 GMC Vandura Special, 1994 GMC Vandura, 1994 GMC Suburban, and 1994 GMC Rally Camper Special. However, it is still accessible from the selected car via links, so may be relevant.
- Check the Supply to injection pump. Refer to BASIC TESTING - 6.5L DIESEL
- Check for air in fuel system. article
- Check the fuel return from injection pump. Refer to BASIC TESTING - 6.5L DIESEL article
- Check engine shut-off solenoid operation.
- Check the fuel injection nozzles. See INJECTORS
- Check the fuel tank cap vent.
- Check for an internal injection pump problem.