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Home › GMC › 1997 › Forward Control 7.4 J › Repair and Diagnosis › External Pages › Different car › Section 78 (Engine Controls - Basic Engine Testing - 6.5L Turbo Diesel) › Basic Fuel System Checks › Fuel Pump Flow Test

Fuel Pump Flow Test

WARNING: This page is about a different car, the 1998 GMC Forward Control and 1998 Chevrolet Forward Control. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove FUEL SOL fuse. Disconnect fuel line at fuel pump outlet fitting. Install a hose at fuel pump outlet fitting and place hose in a container to collect fuel.
  2. Crank engine for 15 seconds. If fuel pump does not supply about1/2 pint of fuel in 15 seconds, go to FUEL SYSTEM PRESSURE TEST .
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