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2002 Chevy Tracker electrical out put

I have an '02 Tracker and I’ve noticed if I have several accessories running, that my engine will start to sputter and come to the verge of stalling when I come to a stop. It happens if I have the heat/air and radio or charging my phone on together. What is the cause and/or remedy for this? I’ve changed the alternator a few yrs. back, but it still continued.

I’ve never had a vehicle stall because of overloaded accessories. It’s probably a bad or dirty IAC (Idle Air Control Valve). How many miles on your engine?

Are your battery connections clean and tight with no corrosion? Get a cheap multimeter and read across the battery terminals. It should be 14.1 volts dc with the engine running and 12.5 volts or greater with engine off.