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Running lean ed 1-10-10  
2002 ranger 4.0 sohc engine codes are for lean bank 1 and lean bank 2,was suggested a tune up would cure problem, any other ideas
Re: running lean BUBBA THE BUS TECH 1-11-10  
Several things come to mind, 1st vacume leak, this is usually accompanied by a fast idle condition, but not allways. 2nd bad O2 sensors, you should have the unit scaned with a scanner that can read "Cross counts" on the sensors. 3rd exhaust leak upstrem of the sensors. 4th bad pluds wires or coils, 5th low or failing fuel pressure. 6th any number of bad injector and general injection problems. Good Luck
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