here's the problem, when i am driving my car will start to overheat, only when it is hot outside in the day time, when it is night time, it will not overheat, when my car is seating with the engine on the fan kicks in normally,

also when my ac is on it starts to overheat too...

when my engine is on and i turn on the ac, are both fams suppose to be on?

what could cause this? bad grounds? relay problems?

thanks

 

it sounds like your water pump sucks, have u replaced ur thermostat? id to that first, and see if it contenuies, if it does your water pump is going to chet....your not leaking and coolant right???