just bought this ranger for $500 great body/interior. problem is it idles good but cant give it any gas or else it will spit and sputter throwing out tons of black smoke. there is a CEL on but I cant read it, scanner says theres a shorted wire, so i tried the jumper method to read the CEL blinking and it still wont work. also the people i bought it from had to wire it up so that the fuel pump runs non stop when the key is in the ON position when the motor isnt running. they said it ran good for a few months that way. the truck has new cap/rotor/wires/plugs and a new fuel pump. I dont know where to start to find the problem if i cant read the codes.