what is the fuel pressure supposed to be on 1993 isuu trooper s?

Answer 1

Depends....is it port fuel injected, throttle body, or elec. carb? Carb should be around 8 PSI, throttle body will be around 25-30 and multi port will be around 30-40. Hope this helps, good luck. Don't forget that when you troubleshoot, you need to spray starting fluid into the intake to isolate your trouble between spark or fuel.