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?
1995 Chevy Yukon, 5.7, 4WD. Stalls, lacks power. Oxygen sensor code. on 1995 GMC Yukon
by fixit64 in Chicago, IL on June 22, 2011
ANSWER by Visitor , August 10, 2011
check the f/regulator on the TBI blown gasket replace it. take carb cleaner get it idling and spray around the TBI gasket for leaks. also check your egr see if its opening and closing upon acceleration. only thing left to check for these symptoms is new TPS. good luck