I have a 2000 Impala 3.8 with 202,000+ miles. I can only start it after waiting for the battery light to stay on. It then still needs to warm up. If not completely warmed up, it will stall when I let up on the gas and won't start again until I wait for the battery light to stay on. I can then drive if I keep rpms over 1000 and brake with my left foot. After about 10 miles it will stay running. There is no check engine light on and doesn't pull any codes. We have replaced the O2 sensors, fuel filter, fuel pressure regulator and the MAF sensor. If I need to make a stop at store or gas station, etc. I will still need to wait for the battery light to stay on before it will start again. HELP! Thank you in advance.