This document is for deep dives into troubleshooting diagnostic trouble codes (DTC) on both OBDI and OBDII 6.5L EFI vehicles

• Stanadyne Service Bulletin SB500R2

  • This document contains advanced electrical troubleshooting steps provided by the creator of the DS4 injection pump.

    • No start, no fuel being delivered? This document tells you how to actually diagnose it

    • Want to know if your PCM is actually telling the PMD to send an inject command to the fuel solenoid?

    • Optic sensor or crank sensor signal issue? It covers that too

    • Cross reference of all OBDI and OBDII trouble codes, with advanced troubleshooting details for each

• Stanadyne combined DTC list

  • Lists all OBDI and OBDII codes and the cross reference between them