Michigan Gov. John Engler wants to increase the diesel fuel taxes 4 cents per gallon as part of the fiscal 2003 budget he proposed last week. The budget would raise the state’s diesel tax to 19 cents a gallon, the same rate as the gasoline tax. Trucking companies say they shouldn’t be expected to pay the same amount of fuel tax because they pay other fees and taxes other motorists don’t pay. The money raised from the tax increase would be spent to repair highways and bridges.