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Car parts & accessories | 07.10.2013 - 12:10

How to identify if your fuel pressure regulator is Bad?

Amongst other components, people will find that the fuel system of their vehicle will also include a fuel pressure regulator and a fuel pump.
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However, when problems with the parts this system arise, the vehicle will run irregularly or it won't even run. The great news is that with a bit of testing anyone can determine what's wrong with their car and fix it.

The following article is prepared by Larry Buck is the CEO and the Founder of Larry Buck Inc, a auto/truck parts and accessories selling company. He shares new, exiting and informative discoveries found by surfing the net. Happy reading!”

Fuel Pressure Symptoms

If people notice their fuel mileage suddenly drops, if their engine stalls or sputters when they drive or if the car's engine runs rough, then the fuel pressure regulator could be faulty. Thus, while the vehicle is in "park", individuals should rev the engine and watch for the color of the smoke coming out. If black smoke comes out or the engine doesn't start at all or the fuel pump makes strange noises when turning the key on, the fuel system should be properly tested in order to see exactly what the problem is.

Fuel Pressure Gauge

For ruing out issues with the pump or line itself, people should consider purchasing a Fuel Pressure Gauge at their local car parts store and have the pressure of the fuel system tested out. To do so, the pressure testing port's fuel needs to have its cap unscrewed and then have the gauge screwed onto it. Next, the feed to the gauge should be opened and next, the gauge needle will jump and display the PSI of the car's fuel system. After confirming with the car's manual that the reading is not right, it might be that the fuel line is clogged or the fuel pump is faulty.

Testing the Fuel Pressure Regulator

For this test, people should find the fuel pressure regulator and then the vacuum hose which needs to be removed by hand. If there's fuel dripping, then there could be an issue with the regulator. The next step is to put back the vacuum hose on the regulator. While the pressure gauge is still attached, the engine should be started while noticing the pressure reading. Keeping an eye on the gauge, the vacuum hose should be once again removed and the PSI should change from 5 to ten PSI. However, if the gauge's needle won't move when removing the vacuum hose, then it's clear that the pressure regulator needs to be replaced.

Bad Spark Plugs

When the amount of fuel that gets injected into the regulator increases, spark plugs will need to work harder, which means they'll be the first components to need a replacement. As a result, they'll get black and cleaning them won't help too much. Some may get results by cleaning them, but most of the times it's better to replace them.

Bad Fuel Pump

Consequent stalling and overheating are 2 of the biggest symptoms of a malfunctioning fuel pump. For instance, if the car has been turned on for just a few minutes and the pump got heated, then it requires replacement. On top of that, intermittent breakdown is another sign that indicates the pump needs to be replaced. In general, it will work for maybe fifteen to twenty minutes and then stop working.

Another symptom involves the engine's sound while cold starting generally, which is like screeching or screaming. The sound can be heard only when starting the car and after that it will stop. With someone's help, the car key should be put into ignition, while someone stands by the gas cap and listens for the sound of a running engine. If no sounds can be heard, it's clear the pump is faulty.

With that being said, everyone who has problems with their car now knows more about the ways to tackle them. Good luck to getting them fixed!

 

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