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11 mpg, and stuck front hubs... help!!!
my 99 f250 is getting only 11 mpg with new injectors, high presure oil pump, and cronk sensor. i have replaced the exuast from the turbo back and added k&n filters. i have a diablo sport preditor tuner that has three settings 65, 85, and 110 hp. on stock the tires won't break on dirt. on 65 it runs good but the motor surges for a few seconds before settling to a smooth idol, first thing in the morn. the higher i set the tunner the worse it runs. on 110 the injectors clatter like crazy and the truck is sluggish. i love my truck but will have to sell it if i can't get good milege without breaking the bank. (poor boy's got poor ways) lol
then there is the hubs not disengageing. i don't play in my truck but use the 4x4 often wether it be in sand or water. i know that i am loosing mpg there also. when i put it in 4x4 the ac vents change to defrost for a while. i can't really afford new hubs at the moment while recovering from the injector job. is there a way to use the factory auto hubs as manual if i disconnect the vacuum lines to them and do some cleanning as i am sure they need it.
any advice would be great!