Hi,
I have a F33PT Bostitch framing nailer that will fire nails straight on, but will not fire any nails by tow nailing
Can any one help me

Thanks

Exact same complaint here. Gun has bump fire trigger, but it won't fire sequentially. You can get it to fire sequentially if you jam the nose into the piece and then pull the trigger. When the gun won't fire I'm getting a "pshhh pshhh" sound of air leaking. It's like a safety interlock hasn't been cleared. Problem first appeared when the gun was almost empty and tried to fire 3 nails at once resulting in two nails jamming the piston. Shop A said the problem was the nails I was using and sold the Mrs. some 28 degree Paslode nails. I'm firing the correct 33 degree nails. Took the nails back and asked them to look at the gun again. Again they said there was nothing wrong. I suspect they are jamming the nose so it will fire. However I'm trying to use precision and you can't be forcing the gun when nailing hangers. Took the gun to shop B and they reported the same thing. I told them how I wanted them to test the gun. They never reported if they experienced the complaint but they threw $40 in parts at it: new trigger (not the white cartridge, just the trigger) #49, new nose guard #91 and a new contact arm #32. Problem still exists. I'm now nailing hangers and the only way I can get it to fire is to bump fire. This is tough to do and it's quite frustrating. Looking for any suggestions!

The problem is not specific to the as changing it does not affect the tools performance (or lack of). Current project is to fire 1.5"x.148" nails with the precision tip. Gun will only fire if the trigger is pulled, the nose is placed in the hole and then the gun is then slammed to the surface (aka bump fire). If the nose is placed on the surface, the gun is pressed down to clear the safety and then trigger is pulled, the gun won't fire. Change the tip out and try to toe nail and you'll have the exact same problem the OP complained of: the gun will not fire unless the tip is slammed into the surface.

The gun does fire 3" framing nails using the precision tip. These nails are used to toe nail the metal connectors. I may need to hand nail these because using the bump fire technique will be way too dangerous with the next joist being so close.