ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
Engine Fuel Pressure Reading.
This procedure is required if a fuel pressure problem is suspected.
Poor engine performance. Low fuel pressure is suspected.
On EMCP, set ENGINE CONTROL switch to OFF/RESET. Set Battery
Disconnect Switch to OFF. Set DEAD CRANK SWITCH to OFF.
Set Battery Disconnect Switch to ON. Set DEAD CRANK SWITCH to NORMAL.
On EMCP set ENGINE CONTROL switch to MANUAL START.
Establish communication between Cat ET and the engine's ECM.
Select STATUS from the icons list on the Cat ET.
Select a group of engine sensors that include the fuel pressure. Read the fuel
pressure with the engine running.
a. The pressure should be 58 to 76 psi (400 to 525 kPa) during both normal
operating conditions and load conditions.
b. The pressure should be 58 to 63 psi (400 to 435 kPa) at low idle.
If the fuel pressure is not within spec, troubleshoot the restriction and replace
Verify the problem has been resolved.