hello,
According to the haynes manual, the throttle cable adjustment calls for: (@ idle) .5-1.0mm slack between the compression spring at the end of the accelerator cable inner and the plastic retaining block in the throttle guide lever. the 1/4" (6.3mm) would be way too much, and i doubt the car would have much power with that much slack in the cable.
the following link:
http://www.peachparts.com/shopforum/showthread.php?t=137397
and the ABS light point to a bad OVP. i know that you mentioned that you have already replaced it, but it may be toast, perhaps because of the bad voltage regulator?? but, i am not 100% sure.
if i recall correctly, the blower motor has a fuse/metal strip in its own designated black plastic housing, located in the vicinity of the fuse box, open up the fuse housing cover and check it out.
how did you come to the conclusion that your voltage regulator is bad? how much voltage is it putting out? 13-14Volts should be ok.
good luck