1997 Nissan Truck Rough Idle/Stalls

Dear Rasmataz,
Thank You for your patience and expertise. I will order a new pressure regulator and install it and report back to you later in the week. Thank You Again!

Dear Rasmataz,
I've installed the new pressure regulator and observed the following conditions:
1.) Fuel pressure never fluctuated. It stays high at 45 psi with the vacuum hose attached. It never went to 34 psi like it's supposed to 2.) The engine idles somewhat smoother after it is warmed up but at times wants to stall/idle stumbles, but never does 3.) The engine stills revs up on it's own (up to 1,300 rpm, then down to 900 rpm)but the incidents are fewer and not as high revving.
Any thoughts? Thank You!

Dear Rasmataz,
The IACV-AAC is a brand new part so I know it works and is clean. The return line is also clear. I will change the fuel filter and see how that goes. Maybe there's something there that's causing a partial block of the line. I'll report back to you when I'm done.
Thank You Again!

Just because a part is new doesn't mean it is a good part I changed a starter 9 times on a suberu justy because of defective starters from the manurfactures

I have a 97 Nissan 2.4 5 speed love the truck but tired of the problems ever since I bought it it has cut out an ran rough it's almost like riding a bucking bull has a huge dead spot an cuts in an out sometimes it runs fairly decent but then it starts acting crazy I've changed plugs wires distributor cap rotor button throttle body an just put a motor in it cause my old one spun a bearing please help I've spent too much time an money