Just picked up a '90 GXL this weekend. It's in good shape overall and came w/ a '91 parts car w/ most other stuff i may need. But there's a few things I don't really know what to do about... the engine runs great from idle up to 4500 or so, but after that it just seems to shake and not run right... acceleration actually seems to slow down after 4500 so I know it's not running right. Also it seems to be drinking gas which may be a related problem. The wipers only work on speed 1, the intermittnet, II, and mist things don't work, the temp gauge is messed up and the needle never moves, and the power mirrors don't work. Any one w/ any advice on what to do about these? Thanks
Patrick

one other note... the idle is not very consistent and ranges anywhere from 900-1400 when warm and sometimes the idle will surge dropping as low as 5 or 600 and revving to 1500...