Yesterday my daughter bring me his car. As always sweet dad can you check my old Tercel 93. It's running only on 3 cyl for the last 4 months. I first look at the pluggs. They are all clean and spark was good. So I take commpression no 1 was died. One of the exhaust valve did'nt close well.carbon on the seat!! I try to snap it with a screwdriver. on the second try the valve unlock and fall in the cyl. oupps!!! I'm still alive and mom give her a lift to school this morning. And Dad will pay for a valve job!!!