Hydro locked/ missfire. HELP

[Zedx32]

I am completely out of ideas. About a week ago my z developed a misfire, replaced all sparkplugs, checked coil packs, found the dead cylinder, replaced the injector of the dead cylinder, and replaced the PTU. Turn it over and its hydrolocked. I pulled all the spark plugs and the fuel pump fuse, turned it over to push the gas out the spark plug hole and it continously sprays gas out of only one cylinder. Replaced the fuel pressure regulator, and it hydrolocked again. i have no idea what to do.

[z.Leinbach]

sounds like its stuck open?? And is just dumping fuel into the cylinder. Was it a brand new fpr? Orv the one that came off the car?

[Zedx32]

its a brand new fpr.

[z.Leinbach]

Might be faulty part. Nissan genuine or from a part store?

[NolimitZ32]

Stuck open injector or more likely you pinched the seal when installing the injector and now it just leaks past the rail/injector, straight into the cylinder.

[Zedx32]

What would cause that injector to be stuck open? ECU?

[z.Leinbach]

Could be a fault or ecu? Idrk about that

[nissanfreak12]

Injector fault to be stuck open. It happens, even the new ones. Just like nolimit said, you probably pinched an o-ring to cause it to fill the cylinder. Injector is probably fine. Not often the ECU causes the injector to be stuck open unless there is a short in the wire, then its a wiring issue.