AIT sensor

[junkfixr]

My truck is too old for Auto Zone to read the code on. I've eliminated everything except Air Charge Temp sensor and o2 sensor. It idles ok, intermittent sputter but smooths back out. It sputters and stalls under normal acceleration but if press it to wide open throttle it goes like crazy. No hesitation, no sputter, no problem.

Has anyone seen the o2 sensor cause these problems? It's what I'm leaning towards. Tune up, fuel pressure test & all other engine sensors have been checked or replaced except these two sensors, and the o2 sensor hasn't been swapped in at least the 7 years that I've owned it. (I've got tons of spare parts & replaced all the obvious ones.) It acts just like a fuel filter problem, but pressure is good and filter is new.

Any help or suggestions appreciated.It runs better when cold and I'm just throwing parts at it now.

 

[SenorNoob]

I'd say O2 sensor would be on the short list, but you need codes first if it has any.

http://www.therangerstation.com/tech_library/OBD_I.shtml

Just hook the wires up by the diagram and read the Morse code from the test light or check engine light. (If neither are available you can wire in any 12v light.)

It's really not as hard as it looks.

 

[88SXT]

Everything runs better when its cold. Colder air is denser which means more expantion during combustion.

Unless you're talking about when the engine is cold which leads me to believe your problem is related to the fuel trim not adjusting to match engine temps, so either sensor could be the culprit. I broke the head temp sensor on my Accord when I changed the clutch back before Christmas and it ran rich as hell until it warmed up enough for the o2 sensor to read