a few times a month i notice a chirp on start up, it happens when the engine is cold and warmed up, im in phoenix at the moment so its in the 100's all the time and it only lasts a second any ideas?
Check out the tensioners. There two of then. One for the ac and one for the main belt, also does it do it when the ac is on? Start it with the ac on and then start it with the ac off and see if it does it without the ac pump engaged when you start it