My '99 Breeze is having trouble accelerating. My mechanic had it for a day and gave up. Then battery died two days later and was replaced. Seems a little better. Cannot really drive with AC on at all. need to go on trip, has 121,000 miles on it, and it’s 100 degrees here this week. Tried different brands of gas just in case Costco sold me some bad stuff. Sign me Wilted in SC.
We don’t have much to go on. Any more details would be good. Has the mileage changed? I it automatic? If auto are the gears changing normally? If manual, has some checked the clutch?
When was the last oil, oil filter, fuel filter, air filter, plugs & plug wires replaced? Have you had the new battery and charging system checked?
There are lots more things to check like compression possible blocked exhaust or cat converter. Does it get worse when at highway speeds? Any strange or new sounds?
Check the alternator output.