Greetings Scotty,

I own a 2001 Chevrolet Impala 3.4 with an automatic transmission with 145,000 miles and I live in Massachusetts. Lately, when I apply brakes anything less than very gradually, the car seems to make a repetitive, achy, hiccuping noise and sometimes once I get down around 5/10mph the engine will turn off. Always starts right up again, sometimes takes a few tries. Tested the battery and alternator, replaced the fuel filter, air filter and cleaned the mass air flow sensor which seemed to help, although still happens, especially when I have anything less than half a tank of gas. Anything below a quarter tank(which I try always to avoid), and it seems very lethargic and underpowered and is keen on turing off, have a feeling the cold weather isn’t helping. Any thoughts? Thank you!