Can a fuel pump be used to measure volume?
In many cases, you can use a fuel pressure gauge to measure volume as well. Start by connecting the gauge and placing the bleed end of its hose into a clean container. Without starting the engine, activate the pump for 15 seconds while you hold down the relief valve on the tool.
How can I tell if my fuel pump is working?
When performing a static test, check if the fuel pressure holds. Factory repair information will tell you how long pressure should hold once the pump is turned off. Check fuel volume: A pump may produce adequate pressure yet not create enough volume. And that’s where a fuel pump volume test comes in handy.
How long does it take for a fuel pump to start?
Start by connecting the gauge and placing the bleed end of its hose into a clean container. Without starting the engine, activate the pump for 15 seconds while you hold down the relief valve on the tool. Typically, the pump should deliver about a pint of fuel during that time.
Can a faulty fuel pump be repaired by ALLDATA?
ALLDATA has single-vehicle subscriptions for DIYers that provide detailed factory repair information. Also, keep in mind, other issues can mimic a faulty fuel pump. You’ll want to perform a thorough diagnosis to ensure the pump is the problem before replacing it.
When do you need to test a fuel pump?
If your fuel pump is showing the majority signs of having an issue, you need to test to confirm that the problem is actually with the fuel pump itself. Now, you are probably wondering how to test a fuel pump, or whether you can do it yourself. Herein, the good thing is you don’t have to be a professional serviceman to run the test.
What are the benefits of a fuel pump?
In tank fuel pumps have many benefits. The fuel is submerged in fuel keeping it cool, preventing vapor lock and electrical issues. The fuel pump delivers a constant flow of gasoline to the fuel rail at a regulated pressure and volume.
What does it mean when there is no pressure on the fuel pump?
If the test light illuminates but there is no pressure, it means the pump is faulty. When the engine runs, the pressure will drop to 52 psi. If you snap the throttle, the pressure will increase by 5 psi; this indicates the pressure regulator functions well without any issue.
What to do if your fuel pump relay is faulty?
If you need to bypass it for testing, use a fused jumper wire from fuse F46 to the fuel pump power terminal. If it works the fuel pump and voltage holds steady, the relay is faulty. You can check the high pressure system on turbocharged models using a MINI scan tool.