Fuel pressure regulator replacement
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Fuel pressure regulator replacement
How much does a fuel pressure regulator replacement cost?
Your engine needs a constant supply of fuel to stay running, and the fuel pressure regulator keeps the fuel pressure in the ‘sweet spot’ whenever your engine is running.
For most cars, the fuel pressure regulator will perform perfectly throughout the car’s whole life.
However, unexpected issues can pop up that require fuel pressure regulator replacement, but typically on cars with at least 100,000 to 150,000km on the odometer.
The average cost to have your fuel pressure regulator replaced is from $250 to $550, sometimes higher, depending on the make and model you drive.
When a fuel pressure regulator fails, it’s almost always suddenly.
What is a fuel pressure regulator?
Every car’s fuel system has a fuel pressure regulator which keeps fuel constantly pressurised for your engine.
It’s located nearby the fuel rail, either attached directly to one end or mounted on the firewall a very short distance away.
Even if there are two fuel rails like on a V6 or V8 engine, there’s usually just one fuel pressure regulator to serve both.
The fuel pressure regulator is constructed of a metal housing fitted securely to the fuel rail.
The fuel pressure regulator restricts the flow of fuel exiting through the fuel rail, then releases unused gas into the fuel return line.
The diaphragm in the fuel pressure regulator can become stuck or damaged, either building too much pressure at the fuel line or not enough to keep the engine running well.
The only solution is fuel pressure regulator replacement.
Symptoms you require fuel pressure regulator replacement
- Fuel leaking at the fuel rail
- Excessive black smoke from the exhaust, indicating too much fuel is being burnt
- Engine doesn’t run smoothly or not at all
- Check Engine light illuminates for lean or rich fuel mixture
How is the fuel pressure regulator replaced?
- The technician diagnoses the fuel system concern to identify the faulty regulator
- The fuel system pressure is relieved
- In the engine bay, fuel pressure regulator is accessed by removing components such as the intake, vacuum hoses, and fuel lines
- The fuel pressure regulator is removed from the fuel rail and a new one fitted
- Associated systems are reassembled
- The engine is started, proper fuel pressure is confirmed, and the car is checked for leaks
Tips to remember
- Some engines require several hours of disassembly to access the fuel pressure regulator, inflating the cost of repair significantly.
- Fuel pressure regulator replacement should be thoroughly diagnosed as problems like faulty fuel injectors or a failing fuel pump can mimic fuel pressure regulator failure.
How important is fuel pressure regulator replacement?
A faulty fuel pressure regulator can cause your engine to run rich or lean, both of which can cause expensive problems with extended use.
Replacing your fuel pressure regulator once it’s been deemed a problem will ensure your car is dependable to drive and can prevent costly repairs down the road.
If you’ve read this far, you obviously care about your car. A lot. So next time you need a service, repair or inspection, visit AutoGuru.com.au.
We let you search and book from over 1,600 qualified mechanics, who eat car troubles for breakfast.
