Thanks for the info 00Ranger. Also I forgot to add my truck threw a CEL Friday. I checked it and it is 192: Fuel Rail Pressure Sensor Circuit Low Input. But it went back off today.
I have done alot of reading and searching online today and yesterday and I think I have come down to the following:
1. Replace fuel filter, cheap and easy. Then test.
2. Also I am going to try unplugging the IAC and see if the truck stalls, if it keeps running I believe this means the IAC is bad.
3. If it is not the IAC, I am thinking a replacement fuel pump. From what I can tell since the 99 ranger is return less and the regulator is built into the pump so a fuel pump replacement seems like the next viable option. (If that's the case, which is a better option: drop the tank or pull the bed? Dam, shouldn't filled up with gas today.
These are just things I have gathered from some serious searching, but I am no mechanic by any means, so if anyone has some other tips first....Please chime in.
Also There is a what appears to be a vacuum hose under the hood that is not connected to anything, it is plugged but just in there. My buddy that is a mechanic said he wasn't sure but he had recalled seeing another ranger like that with that random line going to nowhere.