announcement

Check our homepage for new, visually rich, fast and immersive experiences!

Fuel Pressure Regulator Problems

Fuel Pressure Regulator Problems

If your car is facing issues such as delayed start, misfiring, racing etc., there can be a chance that the fuel pressure of the vehicle is not working problems. We will find more on this in the following passages.
WheelZine Staff
Last Updated: Dec 10, 2017
A fuel pressure regulator is a device located between the fuel source and the engine. It can be found by simply following the fuel line or rail which carries fuel to the engine. A problem in the regulator can result into no supply of fuel to the engine, which in turn can lead to a breakdown. Mentioned below are some tests that you can carry out yourself to gage any issues with the fuel pressure regulator.
Test 1
You can test the regulator to check the symptoms of a problem with the help of a fuel pressure gauge.
  • Insert the gauge along the system line in a testing port provided in the assembly.
  • In case the testing port is absent, use a fuel filter hose to bypass the line by inserting the gauge along the arrangement.
  • Check the reading of the fuel pressure.
  • If the reading is between 45 p.s.i. to 55 p.s.i. for the injection mechanism and 14 p.s.i. to 18 p.s.i. in the throttle bottle injection assembly, your regulator is fine.
  • A large deviation from the above mentioned ranges can be a sign of a potential problem.
Test 2
  • Sharply strike the pressure gauge which is connected to the throttle arrangement.
  • For a normal functioning pump, the pressure reading should rise by 5 p.s.i. approximately.
  • A drop in the reading indicates a flaw in the regulator. This may be due to a faulty pump or clogging of the filter with some impurity.
  • Remove the pump from the system and clean or replace it by a new one. Make sure that you retest the system on reinstalling the setup.
Test 3
Another test involves the regulator and fuel pump. To conduct the test,
  • Start the engine and after allowing it to idle, carefully notice the vacuum line being displaced by the gauge.
  • The reading should rise to show about 5 p.s.i. to 10 p.s.i.
  • If it does not show any change, the regulator has a problem, specifically with the vacuum line.
  • The regulation can be brought back to normal functioning by changing the regulator and by testing the new one for usability.
Minor car problems are usually a result of an abnormal pressure conditions in the fuel system. A high reading can result in heavy emissions. The problems arising out of this can be misfiring, clogging of system, racing and so on. On the other hand, a low pressure in the fuel regulator may cause a delayed or no start, misfiring and abrupt ignition.
Regulator problems are easy to detect. It is very essential to keep fuel pressure in the proper operating region for a longer and smooth engine life. So, the next time you sense a slight glitch or hiccup with the working of the engine, it is time for thorough checkup of the vehicle.