My 2003 ford explorer is running hard for the first 1000 rpm. my check engine light came back reading the code bank 2 sensor 1 stuck open. so i changed the sensor before the cat but still ran hard. so i ran the code then it started saying bank 2 sensor 1 stuck lean biased cnfirmed. so i changed the the other sensor on the driver side. but this time my check engine light is not on but its still running hard for the first 1000 rpm. and the vehicle just feels heavy and not accelerating to its full potential

 

If it's a 4.0 SOHC, you might have an intake gasket or o-ring leak.

 

codes mean little unless followed by proper diagnostics.

Connect a LIVE DATA SCANNER and check the O2 sensors for proper switching and no bias..

Then run a check on the LTFT.... Philip

 

yes it is a 4.0 sohc and i did hear the sound of a vacum leak sound under the hood when i rev the engine