Why doesn't presser foot stay up? - Singer 7422

Check the latch component on the presser foot bar and on the presser foot. Perhaps something has become loose, fallen off, or become damaged. Have you tried a different presser foot and, if so, does it work? If more than one presser foot will not attach, then the problem is on the presser foot bar.

Check if your machine has a presser foot pressure adjustment. Most machines do. It sounds like the pressure on your machine is set to the minimal or it is malfunctioning.
http://makeitsew.biz/presser-foot-pressure

http://www.sewdaily.com/how-to-sew/sewing-machine-basics/the-best-kept-secret-on-your-sewing-machine

ADJUSTING THE PRESSER FOOT PRESSURE

Adjusting the presser foot pressure on your sewing machine

It is most likely the presser foot you are trying to install was not made for your machine. There are so many machines available and most of those machines have their own presser feet, which are not interchangeable. Unfortunately, even a Singer presser foot is not interchangeable with other Singers. Some have screw attachments, others have lever attachments, some have long shanks, others have short, some are straight, others are slanted. You need to figure out what style presser foot your machine takes and then search for either the presser feet that fit or a shank adapter that you can then use snap-on feet (kits are available on eBay).

http://www.sewingpartsonline.com/sewing-machine-presser-feet.aspx

Sewing Machine Feet eBay

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The presser foot lift lever on many newer janome sewing machines will wear out with use. It can easily be replaced by a sewing machine repair shop or Janome dealer. Or you can look online for a "presser foot lifter" or "presser foot lift lever" making sure to find the correct one for your machine.

make sure you feed dogs are engaged fully and it sounds like you might need a new bobbin cae

if the needle bar doesn't move the needle up & down then the machine needs to be serviced, to find out why it isn't moving

HAVE THE 6091 MACHINE AND THE FOOT IS NOT FROZEN BUT WON'T GO DOWN. OILING THE MACHINE DID NOT HELP AT ALL. HAD A REPAIR MAN COME TO THE HOME AND CLEAN THE MACHINE. STILL THE FOOT WILL NOT GO DOWN.

The presser bar may be stuck and may need some WD40 on the top so it seeps down the needle bar, or the presser foot dial or adjuster is set to 0, or the presser bar spring has broken, or the block and screw on the presser bar where the lever is has come loose.

yes, pressure foot lever should stay raised, this sounds like the spring has broken in your machine. if you are comfortable with delving into the machine you could open it up and take a look. alternatively take it to a sewing repair man and get it serviced as well as clean and lube.

Not sure what the problem is.

There is a screw that holds the presser foot shank to the presser bar.

When the presser foot shank is lowered, it snaps onto the presser foot.

See page 26 of the manual - http://www.singerco.com/accessories/manuals.html