Hi guys ,i have my mazda 323 familiar,at first it just cut off whilist im driving,later on i startrd it and had a hard crank. I then drove home. Next day in the morning i didn't start but only cranking. I took it to the mechanic and said it was a tempreture switch sensor. I replaced it but still wont start.it only start when not connected. If i connect it it wont start. Now im driving it without connected but fuel consumption is high...what could be the problem. Thanks in advance.