1995 Chevy Yukon, 5.7, 4WD. Stalls, lacks power. Oxygen sensor code.
Intermittent stalling at stop lights, lacks power on acceleration. Get service engine code for O2 sensor after driving.
Replaced O2 sensor, fuel filter, plugs, wires, distributor cap and rotor,TBI sprays look good at idle and higher rpm.
Some times will not start on 1st attempt. The TBI does spray fuel during this and the fuel pump is working, but engine does not start. Will start on second attempt. Any suggestions?