1991 Cummins Diesel Engine problems, complaints & recalls
Most-reported problem areas: Equipment:mechanical (3) · Equipment:other:labels (1)
Safety recalls (0)
No recalls on record for this model year (campaigns announced since 2010).
Service bulletins (6)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Engine And Engine Cooling 2023-03-21 · TSB230019-032120 · Service Bulletin/Repair Instructions
this technical service bulletin describes the verification and resolution of active fault codes fc 3232 and fc 2771. this is an update to the previously submitted communication.
Engine And Engine Cooling 2018-09-25 · ATC2077 · Service Bulletin/Repair Instructions
this account team coverage is being issued to address performance concerns on certain r2.8 crate engines. this document authorizes repair locations to re-calibrate the engine control module (ecm).
Engine And Engine Cooling 2018-08-10 · TSB180102-081020 · Service Bulletin/Repair Instructions
this technical service bulleting describes the verification and resolution of heavy carbon deposit/sludge build up causing damage to the engine block. engine failure most likely due to light load operation for an extended period of time.
Engine And Engine Cooling:engine:gasoline:belts And Associated Pulleys 2014-09-12 · TSB-140098 · Service Bulletin/Repair Instructions
cummins: belts are coming off drive pulleys of high fan centers and being shredding which can be compounded if units have front engine power takeoff (fepto) and installing an idler pulley between fan clutch pulley and crankshaft pulley, will reduce belt vibration. *pe updated 8/14/15. *p
Engine And Engine Cooling:engine:diesel 2014-01-24 · PSB-47 · Service Bulletin/Repair Instructions
thomas bus: information provided regarding the updating and installation of the bus vin, properly, in ecu cummins engines. model saf-t-liner hdx, efx. *pe
Engine And Engine Cooling:engine 2008-05-30 · C0819 · Service Bulletin/Repair Instructions
cummins: orion voltage regulator campaign. addressing a fuel lift pump voltage regulator issue. authorizes repair shop to remove cummins voltage regulator from wiring harness and install separate 12-vdc power source for orion bus applications with isb cm850 engines and 24-vdc elelctrical systems.
What owners report
No detailed complaint narratives on file.
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.