hi. my scanner read a code of po339. (i think) but it said...crankshaft position sensor intermitent. i checked the harness.. well, as much of the harness that i could get to , it looked fine so i replaced the sensor. as i imagined the truck now runs like crap,and im gettin the same code plus one that states.."random multiple misfire" i know you have to relearn the computer or somethin and im bringin it tomorrow to the dealer cuz my scanner only reads codes. the only question i have is....is relearning the computer going to fix it? it was fine b4 i replaced it, the only problem was it would misfire and skip at 2500

 

How old isyour Cap, Rotor, Ign Wires, Spark Plugs? and also whatBrand of plugs are you running in it and what is the gap on them?