Bostitch 23 guage nailer just quit. Makes a little puffing noise when triggered. It is not jambed.

SOURCE: Bostitch Framing Nailer fails in colder weather

the prblem may lie with the oil that you are using
[too thick] or the guide is worn

SOURCE: replacing driver unit in bostitch 23 gauge pin

Access is via the head cap. Remove the 4 screws and carefully take off the top. Be careful the head plunger does not fall out and keep it upside down.this way you are sure how to put head back on.

tap top of body against your hand to drive piston up and remove and replace piston assembly.

good luck

SOURCE: Bostitch N88 RH Framing Nailer

Bostich web site live chat with tech.

Go here:
https://server.iad.liveperson.net/hc/44183334/?cmd=file&file=visitorWantsToChat&site=44183334&SESSIONVAR!skill=Stanley%20Bostitch%20Customer%20Care&referrer=http%3A//bostitch.com/default.asp%3FTYPE%3DSTATIC%26PAGE%3DHOME.HTM

SOURCE: I am looking for an online manual for a Bostitch

http://www.bostitch.com/catalog_images/web_pdf/103280.pdf

Testimonial: "That was ext helpful info - I don't know just why I couldn't find it on the Bostitch site but I'm an "geezer" esp when it comes to computers - thanks!"

SOURCE: what causes air leak around trigger and loss of

Are you using air tool oil fairly frequently? Any rubber "O" rings will wear rapidly if not lubricated properly.