Contenu

• Fuel Pressure Specification
• Checking the Fuel Pressure Specification
• Common Problems with Fuel Pressure

The 1998 Silverado, which is officially known as the C/K1500, is a full-size truck sold by General Motors through the Chevrolet brand. The 1998 Silverado was available with three engines: a 4.3-liter V-6, a 5.0-liter V-8 and a 5.7-liter V-8. The fuel-pressure specification between the V-6 and the V-8 engines is different.

Fuel Pressure Specification

The fuel pressure specification for the 1998 Chevrolet Silverado truck is from 55 to 61 lbs. per square inch (psi) for models equipped with the 4.3-liter V-6. Trucks with either the 5.0-liter or 5.7-liter V-8 should have fuel pressure between 60 and 66 psi. As long as the fuel pressure is within the normal range, the fuel system is likely operating normally. If the fuel pressure is low, common symptoms include rough idling and engine hesitation. If the fuel pressure is too high, the most common symptom is an engine running rich, which can cause performance and efficiency issues, as well as emissions issues.

Checking the Fuel Pressure Specification

To check the fuel pressure specification, youll need a fuel pressure gauge, a small tool available at most automotive stores. Turn off the 1998 Silverados engine and open the trucks hood. Open the fuel door and loosen the fuel cap to vent the tank. Hook the fuel pressure gauge to the test port on the engines fuel rail, located on the passenger side of the engine compartment. Turn the engine key to "On" without starting the trucks engine. The fuel system will pressurize and your gauge will give you an accurate reading.

Common Problems with Fuel Pressure

The Silverados fuel system is a complicated network of parts. For fuel pressure problems, its best to seek the assistance of a Chevrolet dealer or a certified mechanic. If your Silverados fuel pressure is too low, common causes include a clogged fuel filter and a bad fuel pump or fuel pump relay. If the fuel pressure is too high, the most likely cause is a bad fuel regulator or a clogged fuel return line.