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  1. N

    I am looking for fuel trim advise

    Well, I checked the wires as best I could following a youtube video on how to go about it and the wires seemed to check out ok, so I replaced the upstream O2 sensor. The truck runs really good so far, but I still do not have the rich-lean-rich oscillation on the upstream sensor like I am used...
  2. N

    I am looking for fuel trim advise

    Thank you! I'll test the wires before swapping the O2 sensor.
  3. N

    I am looking for fuel trim advise

    A neighbor stopped by and suggested pulling a battery terminal for a while to clear out any 'learned' bad habits, (DOH! Why didn't I think of that?!?) so I did that. I started it and let it warm up, and the idle was smooth as could be. After 5 to 8 minutes mainly idling with a few revs to 2k now...
  4. N

    I am looking for fuel trim advise

    Thanks for the replies. I have a fuel pressure tester and just ran out and checked it. 42lbs idle and 50lbs at approx 2500 rpm. I'll have to find my vac gauge tomorrow (haven't used it for years) and see what it shows. I'm still curious that the short term fuel trim is showing it is trying to...
  5. N

    I am looking for fuel trim advise

    1999 1500 5.9L 160k miles. My beast has been running fine until a few weeks ago. I started noticing a minor misfire at idle and at speed. This kept getting worse, so I figured the old girl was due a tune up ... cap, rotor, plugs and wires. Now it is even worse. No check engine light. Got out the...

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