Pontiac Repair: 1999 Pontiac Sunfire 2.2, delco battery, pontiac sunfire

Question
The car hesitates to start in warm to hot weather.
Cold weather the car starts great(below60degreesF)
Batteries seem to not last long in this car before
needing replaced, since the car was new.  Original delco
battery lasted 6mths second delco lasted 18mths.
The starting problem started about 30K miles and continues
at 95K miles.  Runs great after it starts.
Any Suggestions on the hesitation to start?

Answer
Hey Tim:

I would have an electrical system check done on this car.. I would check the alternator to make sure the output is what it is rated at. I would then have a parasitic draw test done. What that is is when the car is off and it had sat for say 1/2 hour to make sure there is nothing in the car that is keeping an excessive drain on the battery. if you have anything after market on this car alarm/amp for radio etc. The car has a base draw that in minimal. It's to keep the colck radio memory going and the computer memory for the engine computer.. Next thing I'd check is the starter motor make sure that is doesn't have an excessive drain when cranking the car.. LAst thing would be the battery cables. If you have high resistance in either cable it will "rob" the starter of the necessary amerage to crank the car over. And tempature has a HUGE roll in this. If the cables already have excessive resistance in them and you warm the car up from the outside temp. it will make the problem worse. If you had a battery thta went bad and was leaking acid out of the the posts that acid wicks it's way into the cabes and that's where the problem started... I would also next battery you buy get one with a higher cold cranking amperage and a longer reserve capacity. Good luck :)