i recently drove my rx7 (GSL model) on the highway at 180 kph...i drove for about 45 minutes and when i decided to exit the highway for some strange reason my steering go very stiff (oh yea, i have power steering)..can anyone advise me on what the problem may be...

 

The 1st gens power steering are known for breaking the pulley shaft, I hope is not you're situation, pull on the pulley away from the pump to find out. Good luck