03 impala 3.8 will warm up, rpm will start to vary then stalls. Have changed fuel filter, idle ctl sensor, mass air, took throttle body off and cleaned, vaccum idles at 17 to 18 in, fuel holds at 46 lbs, at shut off jumps to apx 54lbs, pressure will go up to 54 when vacc line is off pressure reg, injectors read 13.1, 13.7, 13.8, 12.9, 12.9, 12.8, in resistance, The only code I show is p0134. Have not changed rear oxy sensor yet. Front oxy sensor and cat conv has been replaced. Running out of ideas?????? Thanks!!


We found problem to be the new front oxy sensor. It started to throw a code p1133.