| I'm not so sure that this would work on a diesel to increase fuel economy. Just shutting off the injectors would still allow the non functioning cylinders to compress air with would take work. Dodge used to do this on there older 5.9's in cold climates for the idle. The extra load of the 3 cylinders not firing allowed the engine to warm faster as the remaining 3 had to work harder. This is also used in marine but just for warm-up as well |