We repair and exchange Dodge Ram 2500 and 3500 Cummins ECMs every week: the 5.9L 24v common rail CM845, CM846 and CM848 (2003-2005), the CM849 (2006-2007), the 1998.5-2002 5.9L VP44, and the 6.7L from 2007.5 up. Dead hole, no-start, no communication. Most of it is repairable, and every unit goes back programmed to your VIN.
These show up on the 5.9L Ram trucks week in and week out. If your symptom is on this list, that is good news. It means we have seen it before and it is fixable.
What you see: a dead cylinder or steady miss that follows the truck and not the injector, a rough idle, or a smoke and power complaint that does not clear with a new injector.
What's happening: a shorted injector or a chafed harness wire fed a fault back into the ECM and burned the injector driver circuit, usually starting as one dead hole.
What we do: we rebuild the driver circuitry and bench-test every injector channel before it ships back, so you are not chasing the same dead hole again.
What you see: the truck cranks but will not start, and the ECM will not connect to your scan tool even with good power and ground.
What's happening: the internal power supply or processor section of the module has failed, often after a jump-start spike, a low battery, or age. That is a board-level fault, not your wiring.
What we do: we trace the dead spot, restore the power and communication side on the bench, and the crank-no-start clears.
What you see: a truck that acts up hot and starts fine cold, drops in and out, or stalls and restarts after it cools off.
What's happening: years of heat cycling and engine vibration crack the solder joints inside the module, throwing codes that come and go.
What we do: we reflow and replace the failed joints and parts, then heat-soak and bench-test the unit before it goes back.
What you see: a replacement ECM that bolts in but runs wrong, throws codes, or will not start because it is not matched to your truck.
What's happening: Chrysler made frequent running changes on the early common rail trucks, so two ECMs with the same part number are not always the same calibration.
What we do: we program every Ram ECM to your VIN and engine data so it goes back as an exact match, whether it is your repaired unit or an exchange.
Don't see your exact symptom? Send it in anyway. These are the common ones, but these ECMs fail in other ways too, and we test every unit before we tell you what is going on.
Self-ship free, or add a prepaid UPS label. Drop-offs in Princeton, MN by appointment.
Bench testing is included in the repair price. We test it and tell you exactly what failed, usually in 1-2 business days.
Injector driver repair, power and communication restoration, board-level reflow, whatever it needs. Standard turnaround 3-5 days on the bench.
Programmed to your VIN and engine data, bench-tested, and backed by our 2-year warranty. Plus 1-3 days return shipping.
Verified Google reviews
"Mike does great work and sent my repaired ECM back to me right away. Saved me thousands of dollars vs. using the dealer. Would recommend to anyone that needs prompt repair."
"From ECMs and harnesses to straight-out cutting counter bores in-frame for us. Great shop — and a great person to have in your pocket."
"Highly recommend these guys! Fast turnaround — I had my ECM back and repaired by the next day. Will definitely do more business in the near future."
"Michael is a diesel guru. He made my rig scream and had it done when he said, for the price we agreed to. I'd highly recommend him."
"Mike is highly knowledgeable in all areas of diesel repair — from mechanical work to advanced electrical diagnostics. You can count on him to get the job done right."
"Mike is a very professional and skilled mechanic. I highly recommend him for any of your needs."
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