If the engine won't crank or cranks but does not start, the flex plate between the engine and transmission may be cracked. A cracked flex plate will cause an erratic cranking signal to the powertrain computer.
Car Problem Reports
Kia Sephia No Crank or No Start Due to Cracked Flex Plate
Kia Sephia Problem
Average Mileage: 96,300 mi (84,000 mi - 105,000 mi)
Visitor, 1998 Kia Sephia, 105,000 mi
it will crank but wont turn completly over
I have a problem with the flex plate also, how much will it cost to repair?