Reprogrammed ECU for my Jeep Diesel CRD...33mpg highway
A group from Dailmer/Chrysler with experience in diesels used the Jeep Liberty CRD to modify the ECU. Mine has been great for power and mileage. I have done three highway only tests of 120 each...64mph=31+mpg...61mph=33.22mpg...60mph=33.44 mpg (pretty consistent). These are Texas (lol) winter numbers with a partial grill block, 38psi tires, 2.25" lift with armor and a slightly taller 235/75/16 tires on a 4500# 4x4.
I didn't concentrate on any "hypermiling"...just used the Cruise Control. The Jeep travels 60mph @ 1715rpm. City mileage is also up and driveability is vastly improved. I am pretty impressed with these numbers:thumbup: |
Great numbers so far!
So what exactly can they tune with a diesel? Injection timing? Auto transmission shift points? In theory, a diesel is always running as lean as possible, so what are the computer controlled variables that can be changed to increase efficiency? |
Awesome KJ CRD mileage.
What exactly did they do with the ECU. |
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Funny, how the tune has changed.:thumbdown: |
Actually diesels run the gammit of fuel ratios...from 5:1 to 80:1 depending on fuel injected into the cylinder. They do not rely on the typical 12-14.7:1 stoichometric ratio of a gasser.
Increase Rail Pressure Taylor Boost Pressure Regulate EGR Modify Timing Retune pilot Injectors for less smoke Change Throttle Response for a more linear feel Changed Timing on Viscous Heater Changed GlowPlug Cycle Electric Fan is more protective of tranny Even adjusted Fuel Guage for more accurate display They made the Jeep CRD Drive MUCH BETTER and Improved MPG...less smoke...a bit less noise |
Re: Reprogrammed ECU for my Jeep Diesel CRD...33mpg highway
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