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Just Got My 6.0 FICM Tuner - Interesting
I had decided that before got the tuner I would baseline mileage. Each morning I drive the same 13 mile route on a local interstate so at the beginining of the drive I set cruise control and re-set the computer. ( I have hand checked the computer and it is about .5 MPG off ) This is a bone stock 2006 Crew Cab 4x4 with 4:10 rear
At 60 I get 17.8, 65 15.8, 70 14.0 and 75 12.8. Interesting that there is a 5 mpg difference between 60MPH and 75MPH.
This weekend my FICM tuner showed up from PHP. easy instructions, installed in minutes. Yesterday and today I made the first 2 test runs with the FICM set at Economy. At 65 MPH I got 15.4 and at 70 I got 14.0. So at 70 no change and at 65 worse. My in-patient brain wants to skip to +40 setting but I will continue the test runs at 60 and 75.
As I get the results I will continue to post them.
Some good news my ECT and EOT usually run at 12 to 8 degrees apart and my FICM voltage at start is 47.5! More Later but so far I would have to ask PHP why even load the "Economy" FICM tune, lol.