gmrulz4u Posted August 21, 2003 Report Share Posted August 21, 2003 I tested my Fuel Pressure today and got 42 psi with the Key ON, Engine OFF, and 38 psi with the engine running. These numbers are a-ok, right? Also, this doesn't necessarily mean that there's NO fuel delivery problem, because a Fuel Pump has to provide a certain amount of FLOW(gallons per hour) and not just PRESSURE, correct?? I was actually kind of hoping that I WOULD find a problem because I am almost at the end of checking every possible powertrain system for my: Lean acceleration, Rich idle/deceleration, poor performance/lack of power, etc...etc...But I guess the search continues... Anyone with some answers to the above!?? THANKS! Quote Link to comment Share on other sites More sharing options...
Slade901 Posted August 22, 2003 Report Share Posted August 22, 2003 The fuel pressure should drop from 3 - 10 psi when the engine is running. What kind of engine, car model, year? Specs: Throttle Body Injection (TBI) - 26 to 32 psi Port Fuel Injection (PFI)/Sequential Fuel Injection (SFI) - 40 to 47 psi Quote Link to comment Share on other sites More sharing options...
gmrulz4u Posted August 22, 2003 Author Report Share Posted August 22, 2003 Right, and mine dropped 4 psi, so everything I assume is fine. It's an 89 Cutlass Supreme w/2.8L So it all seems to fit right in with the specs perfectly... Quote Link to comment Share on other sites More sharing options...
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