Dodge Repair: 2000 dodge durango, dodge durango, power steering pump

Question
QUESTION: Hi, I have a 2000 durango that I have done regular maintenance on (oil, tune up, etc.) My problem is that it started ideling rough at stops and using way to much gas. The plugs were changed and were BLACK and SOOT carbon covered. Put news ran okay for a day, then check engine light came on, the part store checked the read and it said o2 sensor or fuel injectors, changed o2 sensor, it ran okay for a few days then started acting up again but not using alot of gas, It is also smoking, black, burnt kind of smell thta leaves black spots on the drive way. can you please try to help me with this I can not afford to take it to a dealer for inspection.

ANSWER: what was the code number for the check engine light.   there is no such code that will say o2 or fuel injector.

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QUESTION: Okay I have taken it to the dodge dealers service 95.00 later they say I need a new wiring harness, because oil from the power steering pump is running through the wiring harness into the o2 sensors. this is happening because the power steering pressure switch is bad, a part they originally told me that was no big deal it would have no bad effects on anything that would make the truck run bad. and they also said that they could not order the part (P/S pressure switch). My problem now is that I can not afford to replace the wiring harness, do you have ANY suggestions on how I can fix this problem without costing me 3 months worth of salary

ANSWER: repair the wires that are at fault

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QUESTION: How do you replace the wires that are all connected together? Second I live in ohio and it would not help me at all to have you look at it when you are in georgia. I would really appreciate a better detailed reply, you have not helped me much, but I do appreciate your time you have given me.

Answer
with out seeing what wires u are talking about in detail  I can not give much more then I have  simply fix the wires that are at fault  broken or damaged  if u dont ant to replace the harness  fix it.  U can open up the harness  its only taped together.