Vehicle recall 94V032000 · February 15, 1994
Mack CF, CH and 15 more models
Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary…
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Fuel injection system reconfiguration to comply with engine emission standards cause higher engine vibration levels which lead to early wear and complete failure of the secondary throttle return mechanism.
- Consequence
- In the event the primary throttle return fails, failure of the secondary throttle return system would not provide protection against loss of throttle control.
- Remedy
- A new production secondary throttle return system configuration will be installed.
- Notes
- System: fuel; fuel pump.vehicle description: class 8 trucks equipped with E6 and E7 engines with robert bosch P7100 mechanically-governed fuel injection pumps.note: if your vehicle is presented to an authorized dealer on an agreed upon service date and the remedy is not provided within a reasonable time and free of charge or the remedy does not correct the defect or noncompliance, please contact the national highway traffic safety administration's auto safety hotline at 1-800-424-9393.
Recall details
- NHTSA campaign
- 94V032000
- Reported to NHTSA
- February 15, 1994
- Filed by
- MACK TRUCKS, INCORPORATED
- Owner notification
- May 27, 1994
- Vehicles potentially affected
- 39,777
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Vehicle speed control
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack CF (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack CH (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack CHR (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack CL (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack DM (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack DMM (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack FDM (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack MC (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack MH (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack MHR (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack MR (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack R (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack RB (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack RD (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack RM (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack RW (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
- Mack U (1987-1992): 1992, 1991, 1990, 1989, 1988, 1987
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.