Boom1699
NAXJA Forum User
- Location
- Grafton nd
I have a 98 with the 4.0 and tge only motor mods being apn header and electric fan kit from ff dynamics. The cooling issue: it runs fine while driving down the interstate in town but it runs hotter when going up hills like 220 and as soon as I take it off road it skyrockets I have changed the water pump thermostat even put in a 180 both radiator hoses the radiator itself is only a couple years old I'm stumped the high idle mileage issue: when u start it up it runs fine and drives fine then it warms up and while your driving at higher speed you let off the gas to slow down and the rpms only drop about 500 once it starts acting up it'll do it with it in neutral too the only wY to make it idle back is to floor it for a second it's only getting 12mpg it should to better than that seems like it should have more power too sensors I have changed are 02 map tps CPs done plugs cap and rotor any help would be appreciated