im gathering everything i need right now on doing a mpfi, and as i got the stuff i noticed on the fuelrail as it sits in the car the far rightside on the fuel rail there is a little round thing held on by two bolts and as i was taking it off under pressure fuel came out but i left it there and now i think i was soppose to get it? was i? are they cheap to come by?

 

Fuel Pressure Regulator

You need it and they aren't that cheap to buy unless you find someone selling a spare stock one.

 

Um... i'v come across somthing and i figured out the Injectors @ Fuelrail i have currently is its off of a 92 civic hatchback and is there any possible way u can still use this on my 91 civic hatch if i get the rest of the stuff i need 1. Wiring harness,
2. Resistor box,
3. ECU from a 91 older Si