What should my base fuel pressure be?
With a return system, the base pressure is set with the engine off, but the pump running. For a GM, this pressure is usually set to 58psi (factory fuel pressure in the rail). When an engine is idling, it may be pulling 20 inHg of vacuum, which translates to roughly 10psi.
What is the fuel line pressure?
Working pressure is not relevant, but wire-inserted hose can withstand 50-85 psi, depending on diameter. High-pressure fuel hose for clamp-type fuel-injection systems is also available. This fuel hose is SAE 30R9-rated and uses a fluoro elastomer inner liner that will withstand up to 180 psi and 300 degrees.
What are the symptoms of low fuel pressure?
Low fuel pressure can lead to engine misfires, low acceleration, rough idles, and engine stalls. If your check engine light is on and your car has been stalling out, you may have a fuel pump failure.
Does a fuel return line have pressure?
A free flowing return line maintains consistent pressure in the system. Ending the return above the fuel level in the tank, or in the filler neck will cause aeration. This can lead to fuel starvation and pump wear.
Can fuel line be submerged in fuel?
A Hose That’s Fortified, Inside and Out NAPA Belts/Hose Submersible Fuel Line Hose is capable of handling gasoline, alcohol-extended gasoline, ethanols, biodiesel or diesel fuel in fully-immersed, mobile and stationary applications.
What is the fuel pressure for a GM 3.1 liter engine?
Fuel Pressure for Later Engines The primary fuel requirement for all other vehicles with the 3.1 liter engine is 41 to 47 PSI. This includes some 1990 A body vehicles, 1990 through 1994 J body vehicles,1991 through 1994 L body vehicles, 1994 N body vehicles, and 1991 through 1994 W body vehicles.
What should the fuel pressure reading be on a Chevy Cobalt?
The fuel pressure tester should give you a reading between 50 to 60 PSI. CASE 1: The fuel pressure is within the indicated specification. This is the correct test result and it lets you know that the fuel pump is working correctly in your 2.2L Chevrolet Cobalt.
What was the fuel pressure requirement in 1989?
Some 1988 through 1989 vehicles with the 3.1 liter engine have a fuel pressure requirement of 34 to 47 PSI (pounds per square inch). This includes A and F body vehicles. The F body vehicles continued this fuel pressure requirement through 1992. 1989 W body vehicles have a fuel pressure requirement of 40 to 47 PSI.
What’s the average fuel pressure for a car?
TBI 1987—93 9—13 † 8—cyl.: 5.0L, 5.7L 1994—96 9—13 † † 13 PSI minimum deadhead MFI @ CFI Pressure @ (PSI) Engine Year 2.2L, 3.4L 1994 – 96 41—47 31—44 47 min. 3.8L 1992 – 95 40—47 30—44 47 min. 4.3L CFI 1992—95 55—61 37—43 61 min. 4.3L Turbo 1991 – 93 38 – 43 25 – 30 65 min. 4.3L, 5.0L, 5.L, 7.4L 1996 – 00 60 – 66 50 – 63 66 min.