In one of your pics, you note the polarity was reversed for the ground connection on the pre-pump causing the pump to run in reverse. For whatever silly reason, the yellow wire was always ground and the black wire was +12V as you will note in wiring diagrams. I learned that lesson the hard way and embarassingly it was on someone else's car. I was showing off my skill on how easy the pre-pumps were to replace. Amazingly, the engine started and idled just fine in the garage, so I took a well deserved bow and departed. Next day I learn the engine was badly stumbling and stalling under acceleration even though it was still driveable. They took it to a shop figuring this was a new and unrelated problem. Took a bit for the shop to figure it out, of course making me look bad in the process, but admitted they'd made that same mistake in the past.
--
Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now