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On the pump install, yes, the lever goes to the left, push the rack to the left ( if you removed all 4 pumps either by sticking a finger in one of the other holes or by holding the shutoff lever full counterclockwise. Put the pump in with the pin to the left and get it into the slot in the rack...

So the metering pump should be 2 1/4" from the under side of the mounting plate to the outside surface of the spring retainer.

I'm going to take a look at a good metering pump tonight, the picture looks like the spring is almost bottomed out to me. Maybe I can get a measurement for you to ensure it is fully extended.

FYI, the holes are almost microscopic, so they are difficult to see without magnification. A single strand of fine wire can b used to clean the holes, but magnification is almost mandatory.... if your eyes are aging like mine!

Actually Uniquify, you nailed it! The metering pump in the picture is in fact stuck in the compressed position, I can tell right away! Mesias, you need to clean or rebuild you metering pumps for starters, then maybe check the injectors as well. The injectors have 4 TINY holes around the tip, if...

I've had good luck soaking them in the gallon size carburator cleaner dunk cans. 2 days soaking and then working the plunger while submerged usually frees them up.