Toggling the switch simply applies or removes a ground to the ECM blue connector C1 pin-31. The switch also includes a ground eyelet that can be fastened under the switch on a grounded metal surface. Depending on what version Duramax you have, simply snip off the other wire somewhere close to the switch. The included switch and wiring come pre-assembled with two ECM wires, one matching an LB7 and the other an LLY ECM electrical connector. In short, most vehicle operations that are controlled by the ECM can be modified to suit your needs and application.įollow along as we install a KD custom-tuned ECM and switch assembly.Ī switch gives the driver the option of switching between two different tunes stored in the ECM. Likewise, you could also request that power be reduced for a company work truck. In addition to a wide range of fuel economy and/or power tunes, custom programming also allows you to correct the speedo/odo when making tire size or gearing changes, increase/decrease or remove the vehicle speed limiter, or raise/lower the engine's governed RPM. But, I'd recommend reserving this one for the track or the dyno. Even the 250 tune remains fairly street-able, though it will require nitrous to burn clean. The 100 hp street tune I tested does this by incorporating a linear fuel progression curve, that with a boost pressure of 32-psi produces very little smoke. The better EFI-Live vendors will invest a considerable amount of time and effort to produce performance tunes that maintain the drive-ability manners of the Duramax/Allison. Some might opt for a miserly fuel economy tune in combination with a towing tune, or if competition is in your future - a 100 hp "daily driver" tune and a 250 hp track tune. The driver can then switch between the two on the fly. Perhaps one of the best features of the KD tunes is that the ECM can be programmed with two tunes at the same time. KD is currently offering a variety of tunes that begin with a couple of different fuel economy versions that have produced up to a 2 mpg improvement, to power increases in 20 hp increments all the way up to the giant killer 250. Kennedy Diesel is now offering custom ECM tuning, which provides for a host of additional programming features. The recent appearance of custom ECM (Engine Control Module) programming has increased the number of options for nearly every truck owner, whether they're looking for a few more miles per gallon, a safe towing program or a killer track tune. The various electronic power products have done a remarkable job of increasing Duramax diesel performance, but till now, we've had to accept whatever programming or tuning options were offered by the aftermarket. Custom Programmed Duramax ECM EFI Live- Product Review by - June 2006-2018
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