Help with Open Loop Problem
Ranger is stuck running in open loop. It will start out in closed loop but quickly get to temp and go into open loop. I have tested all the sensors and have hooked up my scanner and checked all the data everything looks good. I even tried a different computer but still the same problem. When in closed loop all sensors and readings are normal. Goes into open loop and all the sudden short term and long term fuel trims go to zero and the o2 sensor shuts down from what I have read this is normal. The only thing is there is no load on the engine it's just idling in the garage. It runs like crap you can actually tell a huge difference when it goes into open loop it almost stalls and runs so rough its a wonder it stays running. Any ideas would be good.