MBE 900 DDEC VI Troubleshooting Section 134 SPN 4259 – Cylinder #4, 5, or 6 Injector/Unit Pump Control Valve Not Operating Normally
MBE 900 DDEC VI Troubleshooting Section 133 SPN 4258 – Injector Unit Pump Control Valve Cylinders #1, #2 and #3 Are Shorted to Ground