What kind of fuel pressure does a 2003 Silverado have?

Discussion in ‘ Engine & Drivetrain ‘ started by westman995, Jul 5, 2016 . I am trying to diagnose a 2003 silverado with the 6.0 vortec in it. Fuel pressure is around 40 psi key on engine off and while running. It goes up a little bit while running or revving it up but not much. The truck starts up no problem but it runs like crap.

What should the fuel pressure be on my truck?

Fuel pressure is around 40 psi key on engine off and while running. It goes up a little bit while running or revving it up but not much. The truck starts up no problem but it runs like crap. My main question is can it be the fuel pressure regulator causing low pressure? There is no gas coming out of the regulator.

What does 0 psi fuel pressure test mean?

CASE 2: You got 0 psi fuel pressure. This test result lets you know that the fuel pump is defective and is causing the engine to not start. Before you replace the fuel pump, make sure that the fuel pump relay and fuel pump fuse are supplying power to the fuel pump when the engine is being cranked.

What causes low fuel pressure in an engine?

1 Clogged Fuel Filter The fuel filter cleans the fuel entering the engine. 2 Bad Fuel Pump A bad fuel pump is probably the most common cause of low fuel pressure. 3 Bad Fuel Pressure Regulator The fuel pressure regulator controls the fuel pressure in the fuel rail.

What should the fuel pressure be on a Chevy Silverado?

If you want to save some bucks on this purchase take a look at my recommendations here: Where To Buy A Fuel Pressure Test Gauge. FUEL PRESSURE SPECIFICATION: The fuel pressure specification for the 1999-2006 4.8L, 5.3L, 6.0L Chevrolet Silverado (Suburban, Tahoe) and GMC Sierra (Yukon, Yukon XL) is 55 to 62 PSI. Flex fuel engines: 48-54 PSI.

What is the correct fuel pressure, 5.3 engine?

My 99 5.7L was always a little below the low end of the fuel pressure specs – even with a new GM pump (still ran fine). Thanks for your reply. Key on, engine off for my truck is 55 psi. Driving is 45 psi. I just can’t believe 45 is enough for this engine.

What’s the fuel pressure on a 99 5.7L?

Not sure what this means in real life. My 99 5.7L was always a little below the low end of the fuel pressure specs – even with a new GM pump (still ran fine). Thanks for your reply. Key on, engine off for my truck is 55 psi. Driving is 45 psi. I just can’t believe 45 is enough for this engine.