Auto Transmission Flexplate Question

[danvhp]

Does anyone know if it is possible for the starter ring gear and the tone ring used by the crankshaft position sensor to move out of position on the flexplate? I have a very difficult problem to diagnose with my Kia Sportage. The spark timing is advanced about three times more than it normally should be and everything has checked out fine. Stumped and looking for some advice. Thanks in advance!

[danvhp]

I hate it on these forums when someone has a problem and then doesn't follow-up with what was the ultimate solution. That being said, my problem was the crankshaft keyway slot. Some bozo before me didn't tighten the crankshaft bolt properly when they changed out the timing belt and now the keyway slot has a chunk missing out of it. The damaged keyway allowed the crankshaft to advance ahead of the camshaft timing causing the engine to run like crap. Used engine or replacement crankshaft is the only way to fix this one. Damn!!!!!