I recently purchased a 1986 ranger with a 2.9L with 89k miles and a rebuilt A4LD with paper work and it only has 5k on it. i bought it from the original owner. he had

its 4wd, 2.9L, and 4.10s around. its a great truck when it ran well

it started one day just randomly while driving. The symptoms are only present when engine is warm and at operating temperature. so when i started it in the morning it runs great and drives great and has all the power but as soon as it warms up ( in about 3-4 miles) it will slowly die if i press the peddle the rpms will decrease all the way to 0 but if i quickly press the pedal over and over again it will sorta creep along. But when say creep i mean around 5 mph. and it will die a lot of the time.

i pulled codes and got

41, 33, 13, 77, 25, 74


i replaced the TPS and the TFI-IV without any difference with the TPS but havent started it with the new TFI but i crawled under the truck to look at the o2 sensor and a white wire has been ripped out of the connector so it is not sending anything to the computer which i think it my real problem and hopefully when i replace it tomorrow it will fix it.

does that sound like a plausible problem from a faulty o2 sensor ?

 

I believe you are in the wrong forum, Four.on.the.floor. Try this one...


Ranger & B-Series - Ford Truck Enthusiasts Forums

 

O2 sensor being bad won't cause it not to run or run that badly. Now if one of the wires is shorted to metal somewhere, that might be a different story.