Originally Posted by 80stech

You don't need a Tee to put the vacuum pump on.

I was going to Tee the vacuum line to pull more vaccuum to see how the fuel trims respond to increased fuel flow (or does increased vacuum at the FPR cause less fuel flow?).

If it's all on turns, then there might be something going on in the tank causing starving and not even related to the rich problem. It just takes a few minutes to take the pump out and have a look at what's going on and get a look at the fuel sender problem while you're there. Having trouble installing the pump increases the chance something went wrong.

I figure I'll have to do that, because I did have problems installing the pump, couldn't even force it down into place (had the gasket wrong), and once installed, the dash gauge didn't read right, anymore (it read Full, but the tank was 9.6 gallons low at the time). Maybe I bent the sender arm, or maybe I crushed the bottom of the fuel pickup (but why is it running rich, later?), or maybe the siphon pump was below the pump while I was trying to force it into place, and that got crushed? I'll use a flashlight to see what lies below.

To take the pump out lift the seat bottom and tilt it ahead, stand it upright in the foot well and there is tons of room, no need to take off seat belts, cut a square of the sound proof material away over the pump if you haven't already, take the cover off, pry off the hose with a bit of care, the nipple has a metal tube but it's still plastic use a small prybar and hammer to tap the retaining ring working a bit at a time on opposite sides. Really shouldn't take long at all.

Been there, done that. This time, I'm taking pictures (mostly to document where the siphon tube is at, and to make sure the pump is centered in the well), use a new gasket I bought, and take my time.