M20 Flywheel Swap Starter issue

[seph429]

I'm using a M20 starter, the 3 post kind. I got it hooked up and went to turn the key and nothing but a loud click.

So i pulled the starter off and tested it with a battery and it worked fine. One post made it come out and spin slowly, while the other post made it spin very fast. So i hooked it up to the car and had my friend turn the key while i watched the pinion come out.

The pinion comes out and spins but VERY slowly. Its like the post that makes it spin fast isnt getting power, but i checked it with a voltmeter and both sides are getting +12v

Would anyone have an idea of where to start to look for the problem? I really want to get the car running and this is (hopefully) the only thing holding me back.

Thanks.

[dvmotorsports]

Start with cleaning the connectors that hook directly to the starter. That appears to be the only variable (the connectors) as it worked fine when you when straight to a battery. Also inspect the wires to make sure one isn't cracked, binding or grounding out.