i have two questions for you sir;
1;why should we prove what your saying is true(most modern evap systems only work on start up; to produce easier start up; the gas vapors come from the tank)
and 2; you put 33's on your truck did you change the speedo gear/sensor(because i doubt they are stock for your truck; and it's more then likely why your truck is not telling you the right distance you've traveled)
ps. most of your posts are in the unicorn corral.
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