mungt99 Posted September 23, 2014 Share Posted September 23, 2014 What should the fuel pump pressure be for my 90 reatta?? Link to comment Share on other sites More sharing options...
Guest Corvanti Posted September 23, 2014 Share Posted September 23, 2014 40 - 45 psi. mine was at 42 after i replaced the fuel pump. some say that the upper 30's is ok. Link to comment Share on other sites More sharing options...
2seater Posted September 24, 2014 Share Posted September 24, 2014 Key on, engine off (no vacuum to regulator), 43.5 psi is the approx. design pressure. Engine running, mid to upper 30's psi. Manifold vacuum is applied to the pressure regulator with the engine running to keep the differential pressure across the injectors constant. If you blip the throttle with the engine running the fuel pressure should spike upwards momentarily and then settle back. Link to comment Share on other sites More sharing options...
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