Q: Low fuel pressure

asked by on January 08, 2017

I have a volvo tad with a 760ve diesel engine that often appears ( psid 96 fmi 1 ) fuel pressure low in rail line. What should I check? My machine is kalmar empty handler .model dcf10045e7 that have volvo tad 760ve.engine. this engine often appear error code psid 96 fmi 0/ 1 that indicate fuel pressure low in rail line. What we should check? I aready checked the fuel feed that 6bar and already changed fuel filter .
My car has an automatic transmission.

Fuel Pump Replacement $120.92 - $1186.72 Get a Quote
Car is getting worse gas mileage Inspection $79.99 - $89.99 Get a Quote

Hello. If your vehicle is displaying low fuel pressure then it may be possible that there is an issue with the fuel pump. There are instances where a worn out fuel pumps will still operate but provide lower fuel pressure, usually until they fail or the vehicle begins to experience misfires or performance issues. Another possibility could be decreased fuel pressure due to an issue with the fuel pump circuit. I would also look at the vehicle’s fuel pressure regulator, which is the component that controls the engine’s fuel pressure. A faulty fuel pressure regulator can throw off the vehicle’s fuel pressure readings as well as affect engine performance. Another possibility could be a faulty fuel pressure sensor, sending a bad signal to the computer. As the possibilities could be many, if you are unsure, I would recommend having a professional technician, such as one from YourMechanic, visit your location, to determine if the fuel pump needs to be replaced.

Hi there. There have been some issues with the water separator head. The flapper valve in the filter head should open when the fuel pump stokes. The flapper valve is supposed to close the bypass hole. If there is dust or dirt on flapper valve seat, then fuel pump will supply less fuel to engine. I recommend checking the flapper valve and clean it if needed or replace it. If you need further assistance with engine having low fuel pressure, then seek out a professional, such as one from Your Mechanic, to help you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

What others are asking

I have a 89 Ranger and im getting gas in the vacuum line to the break booster which is eating thru the rubber

You should check the fuel injection pressure regulator for leaking fuel through the top vacuum port and if it is then replace it. Also replace the brake booster check valve on the brake booster. This should be the cause of...

I have to push the accelerator when I crank up my truck up to keep it from turning off

Depending on the engine maintenance that has been done on a regular basis you may need to have a diagnostic check done to check the condition of the ignition system, fuel system, and the computer sensors for an issue like...

Hard starting after replacing fuel pump

The fuel pump replacement and the subsequent hard starting might be mere coincidence. A way to find out is to request a hard starting diagnostic during which the responding mechanic will inspect not only the fuel supply system, but also...

When coming to a stop i get a jerk on the drivers side.

If the jerking reaction is something related to pressing the brake pedal, this may suggest a faulty brake caliper. If your vehicle pulls to one side when you apply the brakes it typically means that you have a braking imbalance...

Mechanic said I need a new throttle body because my car won't go into to drive or reverse

If you car does not go into drive or reverse, your mechanic is most likely talking about replacing the valve body inside the transmission. This is part of the transmission that directs transmission fluid to build hydraulic pressure, which is...

Engine revving when I pump the gas

There are a multiple list of components which can cause your issue. Your vehicle is particularly known to have throttle body issues and engine vacuum leaks. A diagnostic needs to be performed with special tools to correctly determine the issue....

How long does it take to replace a fuel line?

The fuel lines on this vehicle go from the fuel tank all the way to the engine and may require the fuel tank to be lowered for access to get to the lines on top of the tank. The entire...

Car misfires then goes to limp mode.

When the vehicle goes into limp mode when the engine misfires, the computer is shutting down the electronics to the transmission to prevent damage to the catalytic converter as the fuel condition is either too lean or too rich. Check...

Truck won't start after warming up. 1992 Ford-F-150

Hi there. You should check to see if the fuel pump is turning on when it will not start. This can be done by checking fuel rail pressure or listening for the fuel pump to make noise when you turn...

Related articles

Symptoms of a Bad or Failing Main Relay (Computer/Fuel System)
Common signs include the engine not starting, inability to stay running for a long time, and the Check Engine Light coming on.
How to Buy a Good Quality Fuel Pressure Regulator
There There are all kinds of shapes, styles, and capacities of fuel pressure regulators – from fuel-injected applications to carbureted vehicles and diesel-powered and E-85 engines. The fuel pressure regulator works with the fuel injection system in order to send...
Top 10 Bad Driving Habits That Damage Your Car
Even the best drivers are guilty of bad driving habits. Riding the brakes, not warming up the engine, and ignoring warning signs will damage your car.