i was quoted 1100.00 from kia and 1600.00 from another shop. to have these replaced. im at 147000 mi. diagnostic shot crankshaft sensor code yesterday. i dont even owe that much on the auto. i was wondering about how long it takes to do this job. ive said before, i have had 3 back surgeries and really am not looking forward to doing this job, but before i get raped like that ill do it myself. i was mechanic in the army ,but its been a long while. what kind of time am i looking at?