hey guys, i have a '91 rs and we just rebuilt the 3.1 and put it back in. started up fine, ran fine, tried the ac...kills it immediately - whole car stops running. tach drops straight to 0.

checked and double checked all the vacuum lines...they're fine. unplugged the ac compressor still does it. unplugged the fan...still does it. so now we're gonna start looking into the electrical part of it all.

so any advice would be great. thanks guys...