so today i started up my 92 lumina 3.1L and let it run to warm up so i could test the heater before winter comes. the heater worked fine so i went to shut the hood and noticed that neither fan had come on. so i waited a few more minuites (about 7 min after i started it) and still neither fan had started. about 2 min later i saw some smoke comeing from around the intake manifold but it could have been comeing from somewhere lower and just came up through there. so i decided that was enough and shut off the car.
how long does it useuly take for the fan to come on and whats the first thing i should be looking for to check for the problem? ive already checked the connectors to the fan motors.
by the way when i tested it it was a partly cloudy day and was about 20 degrees C.