2011-2014 John Deere 4940 Series Sprayer Reflash
Tier4A Emission Reflash and Custom Tunes Available
We can ship anywhere in North America in 1 business day
Includes 1 year software warranty
Note: Items with expedited shipping ordered after 12 ET will not go out until the following day.
If you have 4730, 4830 2011-14 refer to our 2007-2011 EGR Reflash
Please take a minute to review our position on Over the Air (OTA) updates.
- Stage 1 Tune focuses on fuel economy with small torque increase
- Stage 2 Tune focuses on HP and performance with a fuel economy boost
In need of more power?
This is a question that we get asked quite often. If you are in a situation where you feel like the machine you have is lacking in the horsepower department, we can help! When it comes to horsepower increases, the best way to explain it is that we are making the engine more efficient. It produces more power, sooner. When operating the equipment, it will take less load on the engine to get up to speed. This reduced the overall load on the engine, and as a result reduces the amount of fuel required. If there is a situation where more power is needed, you’ll have the extra horsepower available to you! It really is the best of both worlds.
What is an EGR System, and why remove them?
Exhaust Gas Recirculation (EGR) is a method that is used to control Nitrogen Oxides (NOx) emissions. The purpose of this system is to return a small portion of exhaust gases back into the combustion chamber through the intake manifold. Lowering combustion temperature, resulting in a reduction of NOx emissions. The issue with EGR systems is that the valve can stick open due to carbon deposits. A worst case scenario is that the EGR becomes completely blocked, this will result in poor fuel mileage and a loss of power. When this occurs, it results in engine warning lights and the equipment going into limp mode. The vast majority of exhaust gas recirculation valves power off in the closed position. This means that once they are de-energized, they are in the shut position. On a few select applications, we offer block off plates. These plates are used as a fail safe, to ensure that there is no exhaust coming back into the intake system.
What is a DPF System, what do you need to do with it?
The diesel particulate filter, or DPF is part of the exhaust aftertreatment system. It’s main purpose is to trap particulate matter, such as soot. This soot has to be periodically burned off, which regenerates the filter. When the soot level reaches a high enough percentage, the engine starts to inject fuel directly into the exhaust system. This creates heat and converts soot into carbon dioxide. Having to deal with regen can cause down time for the machine. In some cases, the DPF will have to be replaced, or cleaned manually. Not to mention it is also extremely restrictive on the engine's ability to push air out. When it comes to removing the DPF canister, the only decision you have to make is whether you hollow it out or straight pipe it! !
Emissions tuning is for off-road use only. Please consult your Provincial or State legislation, as this product may not be street legal. Removal of emissions systems cannot be performed on vehicles that are registered for highway use. It is up to the Consumer to know and understand their local legislation prior to purchasing.
Reimer Tuning is proud to be owned and operated in Canada! We have been around since 2014, and we are excited to work with you! Please feel free to reach out to email@example.com if you have any questions.