FUEL RELIEF VALVE 01-04 LB7 DURAMAX

Product Description

Fuel Rail Pressure Relief Valve 01-04 LB7 6.6 Duramax

The Bosch fuel rail pressure relief (limit) valve, is installed in the function block, below the high pressure pump, 01-04 6.6 L LB7 Duramax

Fits: 2001, 2002, 2003, 2004

OEM part number F00R000862, 1110010036

Fuel pressure relief valve failures may cause:

• Lack of power, due to low rail pressure (link to blog post)
• Poor fuel economy, due to a weak pressure relief valve.
• P0148, P0087 or P1093 low rail pressure, depending on the vehicle
• The pressure relief valve (limit valve) is in the fuel rail; it is designed to limit rail pressure to avoid damage to your injectors. If the rail pressure is excessive, the relief valve will open and bleed off pressure into the return system. The pressure relief valve may start to leak, prematurely, not allowing the rail pressure to build to the correct pressure. This means the injectors do not get adequate rail pressure. Many will take the option to simply block off the relief valve, which works, but it does mean that you are removing a built-in safeguard. Would you remove the blow off valve from an air compressor, which builds less than 1% of the pressure? If you’re like many and would prefer to reinstall a new pressure relief valve, order this genuine OE Bosch unit for years of trouble-free service.

Order 1-97250485 banjo seal for installation