I have a Keurig Vue. I have descaled and cleaned the product on schedule but it leaks water from all around the brew head and only 5-6 oz of coffee make it into the mug. I tried to clean out the pin also to no avail. Any suggestions?

SOURCE: Delivers only small amount of coffee per brewed cup

This is a scale issue. All water has minerals wich builds up inside the brewer through time. All you need is white distilled vinegar. Drain the Keurig first and then fill it with the vinegar. After the heat reaches brewing temperature, open and close the drawer to run off a few blanks (3 to 4 cups is plenty). This will prime the vinegar though all the lines. Refill the tank to the top with more vinegar and let the brewer sit (on) over night. The next morning, run off more than half of the vinegar. You should see the cup sizes drastically increase. Within a few cups, you should be getting close to the original 8oz cup. Repeat a few times for good measure. Drain the remaining vinegar, then flush a couple full tanks of good water through it. After all remnants of vinegar is gone, your brewer should work like new.

SOURCE: Keurig starts & stops without brewing coffee, just descaled

The pic is clogged with coffee or the air bladder is bad. Use the tool on the underside of the tray to clean out pic. If that doesn't work, the bladder will be bad.

SOURCE: Keurig only brews about 2-3 oz. of coffee.

Doesn't sound like a descaler issue. I am having problems with mine and noticed that water is flowing back into the reservoir when it is pouring into the coffee cup. I think there is a valve that is not closing properly.

SOURCE: pump starts then stops. I have cleaned all holes.

Mine would only very loudly pump a partial cup after about two years of use. I tried everything, including descaling. Even held my mouth different ways. I took it apart three times, the last time intending to glue all the rubber hoses. By accident I discovered a plastic "filter" in the intake line just below the water reservoir. I removed it, cleaned it out on both sides with a toothbrush, put it back in, and now it works like new. The filter is easy to get to if you take the bottom metal plate off: 5 screws for that, then two screws in the filter unit directly under the reservoir. You get to it from underneath the coffee maker. Pull the black cover back to expose the plastic hose, then pull the black filter out.
It is easier to do than to describe.
I have not seen this fix anywhere on the net, but I can verify that it works.

SOURCE: my k cup reusable coffee

I had the same issue and found a **** fix that is working well. The issue is that the hole in the my-kcup doesn't seal to the machine so I take a square of foil and put it over the top of the closed my-kcup assembly, crimping it under the rim of the cap. This seals the assembly and forces the water through the my-kcup. It also makes a better cup of coffee because the water is all going through the grounds.