Update: This investigation was upgraded after Fiat Chrysler issued four recalls related to the high-pressure fuel pump failures.
Ram heavy-duty trucks with 6.7L Cummins diesel engines will be investigated for engine or fuel pump problems. A Ram diesel truck recall may be issued if an investigation indicates problems with the heavy-duty trucks’ engines or fuel pumps.
The investigation affects nearly 605,000 of the following vehicles equipped with 6.7L Cummins engines:
- 2019–2020 Ram 2500
- 2019–2020 Ram 3500
- 2019–2020 Ram 4500
- 2019–2020 Ram 5500
The National Highway Traffic Safety Administration has received 22 complaints and two field reports from Ram truck owners, who had complained that the high-pressure fuel pumps failed and caused the trucks to stall.
According to most of the complaints, failures and stalling occurred when driving over 25 mph and drivers had to get their trucks towed.
A 2019 Ram 2500 owner said: “I started my pickup and pulled out of garage put in park to close my garage door and with 2-3 minutes at idle, smoke was coming into the cab, got out of vehicle and opened hood and found flames coming from fuel injection pump area.”
Another 2019 Ram 2500 owner said: “[The] CP4 [fuel pump] failed while driving down the road. [It] lost power and could not accelerated. [It] coasted to the side of the road. […] I had to take it to a shop where they confirmed it was a CP4 pump failure and had to replace the pump and injectors out of pocket.”
A 2020 Ram 3500 owner said: “The contact stated while driving 65 mph and towing a generator up a hill, the vehicle stalled with the diesel exhaust and engine stability control warning lights illuminated. The vehicle was not drivable.”
In November 2019, Fiat Chrysler issued what it called a “fast feedback program,” in which it issued a warranty bulletin to replace the Cummins diesel engines and fuel injection pumps. This program was revised six times.
NHTSA wants to learn the safety consequences of the Ram trucks’ stalling issue. Once the investigation is complete, NHTSA will determine if the affected Ram diesel trucks should be recalled.
Source: CarComplaints.com, NHTSA.Gov
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