4x4toy86

I just got another yota accept its an 88 witch i picked up for $700 bucks with only 130,000 on the hole truck now the problem im having is when im idling its ruff an when im trying to accelerate its like i have no power barely any at all.
One thing i did notice isunder the fuel pressure regulator there is a plastic cap and a screw in the bottom of the regulator an the screw was not in the threads liek its suposed to be an i also notice there is a double sided valve right next to it that had one hose missing from it any info would be greatly appreciated.