Fuel Pressure Regulator: Volvo 740 Non-Turbo Edition

The Volvo 740 is a car that was produced from 1985 to 1992. It comes in both turbo and non-turbo variants. The fuel pressure regulator in a car controls the fuel pressure and returns any excess fuel to the tank. This article will explore whether a non-turbo Volvo 740 has a fuel pressure regulator and, if so, what type it is.

Replacement parts for a non-turbo Volvo 740 fuel pressure regulator

The fuel pressure regulator in a non-turbo Volvo 740 is a critical component that ensures the engine receives the correct fuel pressure. While searching for replacement parts for the fuel pressure regulator in a non-turbo Volvo 740, it is important to consider the specific model year of your vehicle, as there may be variations in parts across different production years.

For example, the 1985-1988 Volvo 740 with the B230 non-turbo motor utilised a factory replacement 2.5 bar regulator with the Bosch part number #0 280 160 292. This particular part is no longer sold by Volvo, but it may still be available through third-party retailers or Volvo specialists.

When considering replacement parts, it is advisable to consult a trusted mechanic or a Volvo dealership to ensure the correct part is sourced. Additionally, some online forums and communities dedicated to Volvo enthusiasts can be a valuable resource for identifying compatible parts and troubleshooting any issues related to the fuel pressure regulator.

It is worth noting that some Volvo owners have reported finding conflicting information regarding the correct part numbers for replacement fuel pressure regulators. In such cases, it is recommended to refer to the original equipment manufacturer (OEM) part numbers or consult a Volvo specialist to avoid purchasing incompatible components.

Furthermore, when replacing the fuel pressure regulator, it may be prudent to inspect other related components, such as the fuel filter, fuel injectors, fuel pump, and associated wiring connectors. Ensuring that all parts of the fuel system are in good working order can help prevent future issues and ensure the optimal performance of your Volvo 740.

Troubleshooting a non-starting 1990 Volvo 740

If your 1990 Volvo 740 won't start, there could be a few things wrong.

First, check if you can hear the fuel pump. If you can't, the issue could be the fuel pump relay, which is located in the fuse box behind the ashtray.

If that's not the problem, the ignition power stage, which is bolted to the driver's fender behind the headlight, could be cutting power to the coil, meaning there is no spark.

Another common issue is the noise suppression relay, which powers the injectors. Some cars have two, one for the cooling fan, so you can try swapping them to check.

If you have spark and fuel, the problem could be the RPM sensor or the ECU.

If you have spark but not fuel, you may need to check your fuel pressure.

If the car is stalling, the issue could be leaking fuel injectors, a problem with the ignition system, a bad coil, or the ignition control module.

Signs of a malfunctioning fuel pressure regulator

A malfunctioning fuel pressure regulator can lead to a host of issues with your vehicle. Here are some telltale signs that your fuel pressure regulator is not functioning properly:

Engine Performance Problems

A faulty fuel pressure regulator can cause a loss of fuel pressure, resulting in engine performance issues such as hard-starting, rough idling, stalling, and a lack of power. Engine misfires, reduced acceleration, and a decrease in fuel efficiency may also be early signs of a failing fuel pressure regulator.

Illuminated Check Engine Light

The engine computer is designed to detect issues that could lead to increased emissions. When it identifies problems, such as engine performance troubles caused by a faulty regulator, it will turn on the check engine light and store a corresponding diagnostic trouble code (DTC) in its memory.

Black Smoke from the Tailpipe

A malfunctioning fuel pressure regulator can cause the engine to run rich, resulting in black smoke emitting from the exhaust system. This is due to excess fuel being burned off and exiting through the tailpipe.

Fuel in the Regulator's Vacuum Line

A ruptured diaphragm within the regulator can cause fuel to leak into the vacuum line connecting the regulator to the engine vacuum.

Vehicle Cranks But Doesn't Start

A faulty regulator can prevent the engine from receiving the proper fuel pressure, resulting in a vehicle that cranks but refuses to start.

Fuel Leaks

A malfunctioning fuel pressure regulator can cause fuel leaks, which pose a potential safety hazard. Leaks can occur from the tailpipe or the vacuum hose. Additionally, you may notice a strong fuel smell or observe fuel dripping from the tailpipe.

Excessive Fuel Pump Noise

While the fuel pump typically makes a humming sound during normal operation, a faulty fuel pressure regulator can result in an irritating whirring noise, particularly in slow-moving traffic.

Fuel pressure regulator replacement costs

The fuel pressure regulator in a non-turbo Volvo 740 is located in the fuel rail or fuel line. To replace it, you will need to disconnect the battery, discharge the fuel pressure from the fuel system, and remove the regulator from the fuel rail or fuel line. The labour costs for this procedure are estimated to be between $103 and $130, while the parts are priced between $172 and $203. The total average cost for a fuel pressure regulator replacement is between $275 and $333.

However, the cost of replacement can vary depending on the make and model of your vehicle, as well as your location. For example, the replacement cost for a 1992 4Runner is quoted to be between $425 and $475, while the cost for a 6.7 Powerstroke engine is estimated to be around $250.

It is important to note that fuel pressure regulators are rated for specific engines and fuel systems. Therefore, it is recommended to purchase an exact replacement by part number and to consult the manufacturer for information on part revisions, updates, or improvements.

Additionally, there are several other fuel system components that can cause similar issues, such as the fuel filter and fuel pump. It is advised to perform diagnostics before replacing parts, as the costs can add up quickly.

Fuel pressure regulator products for the Volvo 740

The fuel pressure regulator is responsible for providing a consistent fuel supply to your Volvo 740 while driving. Located inside the fuel tank or elsewhere on the frame, the fuel pressure regulator controls the pressure of the fuel being supplied by the fuel pump to the engine's fuel injectors.

There are several fuel pressure regulator products available for the Volvo 740. It is important to note that the part numbers for these products may vary depending on the year and model of your Volvo 740. Here are some of the products available:

GP Sorensen Fuel Pressure Regulators:

• 800-192
• 800-157
• 800-172

Bosch Fuel Pressure Regulators:

• 0280 160 225
• PR60 (for turbo models)
• PR80

Standard Ignition Fuel Injection Pressure Regulators:

These regulators are available with varying operating pressures, number of outlets, and reference port inclusion. Operating pressures range from 10 psi to 66 psi, with some options not including a reference port.

When replacing a fuel pressure regulator, it is important to refer to your vehicle's owner's manual and consult a trusted mechanic or a Volvo enthusiast forum to ensure you are purchasing and installing the correct part for your specific Volvo 740 model.

Frequently asked questions