ok i changed my opsu and well i am upset.....
its a 91 z24 with a 3.1

Ok i changed the old opsu with a new one and the right one it idled right but i drove it and it stalled a block away from my house so i get it back. i try to start it and it won't start. i have spark,fuel. So i go exchange my new one for another one and well it...did the same thing..so i waited and it started back up and i turned it off then started it back up it seamed fine then i gave it a quick rev and the check engine light came on and the car shut off....

even if no one looked i fixed it was a fuel pump relay