hi john, if you look further it will have a crank angle sensore, some where either on the balancer or the flywheel or in the block of the crankshaft, which i think the kia run the internal one.
some systems only use the cam sensor to start to work out the firing position of the crank then the computers remembers where it,s at vn v6 style commodore was like that once running did not need the sensor. other systems look at the cam sensor all the time.
a js vectra will start with the crank angle sensor disconected takes longer to start while it works out the crank /cam relationship then is rev limited till about 4500 rpm as it has no real speed siginal, new systems now can tell you which cylinder is miss firing from the crank angle/ cam angle sensor it see the crankshaft slowing down then speeding up again as the cylinder does not fire correctly the computer can log a code telling which cylinder.
with my tech 2 scan tool i can do a cylinder balance test it,s cuts out the injecter to each cylinder then records the average rpm drop so you can see if each cylinder is doing the same amount of work. pete.