Coolant fans don't blow hard when car is running fans are straight wired so car won't over heat but fans not blowing fast like they should what is the problem.

Can someone help please

If fan,s are moving ,but not fast,the problem may be the fan motor,s them self,most fan,s do not move real fast anyway,but if you think they are running slow,it will be the fan motor,s,you might check the voltage to the fan,s and make sure there is 12 volt,s to them,but if you are straight wired i can only assume there is 12 volt,s there,,,check the fan motor,s

Yes having problems over heating that's why I straight wired fans but there blowing slow at first when I cut car off they blow fast .an thanks for helping.