Hello! I have a 99 expedition. It had a miss in the engine while accelerating. A very small miss while idle. I checked the error code and found that coil 6 was bad. I changed this and reset the "check engine" light. After 2 days it comes on again. po174 system to lean bank 2. Reading the data stream I see that both rear o2 sensors stay at 0. So I replace both of them. Now I have no "check engine" light on so I am lost. The angine still has a miss. I also changed the fuel filter and check to make sure I am getting fuel to the injectors. One problem I see is that the vaccume hoses look like they have been tampered with. Does anyone have a picture I can look at or even a diagram? Any suggestions or help would be great. Thanks!

P.S. Haynes manual doesnt help much with vaccume hoses. :-)