Low Engine Power: Correction

Remove restrictions.

Remove restriction and/or replace filter.

See appropriate TESTS W/CODES article in the ENGINE PERFORMANCE section.

• TESTS W/CODES - 6.5L DIESEL (for "C" & "K" Series)
• TESTS W/CODES - 6.5L DIESEL (for "G" & "P" Series)

Check fuel return system.

Check fuel delivery system.

Remove and replace fuel.

Check EGR system.

Check compression and valve lift.

Check fittings, and replace as required.

Remove restriction and/or replace nozzle.

Check transmission operation.