Fuel Pressure Regulator and Issues


What is a fuel pressure regulator and why is it important?

Most cars in the market today run on either petrol or diesel. While we all know that, what few of us bother to understand is that the fuel supplied to the engine has to reach the engine with a particular pressure. This helps it overcome forces of gravity and friction and reach the engine (then cylinders too). The regulator also helps in controlling fuel pressure and returns excess fuel to the tank. It also ensures the proper operation of the fuel injectors. So, if the regulator doesn’t function efficiently, your engine may flood and in the worst scenario, may lead to fire hazards too. Owing to the importance of this component, here is how you can keep a tab on the health of your regulator and prevent engine failure and other dangers.

What are the symptoms for fuel pressure regulator issues?

There are several signs you should be aware of, if your car’s fuel pressure regulator is going bad:

  • Blackened or sooty spark plugs – it could imply that the engine is burning oil at that head
  • If your engine is not running smoothly or if you are having trouble in starting your car
  • The tail pipe is emitting black smoke – it is usually a sure sign and your car’s fuel pressure regulator might have to be replaced
  • If the oil dipstick smells of petrol
  • If petrol is dripping out of the tailpipe – though it might be due to overfilling of your tank, still if the petrol is leaking into the exhaust system then the regulator is not working properly
  • If your engine stalls when you press the gas pedal – even if there is minimum bit of hesitation from the car’s engine when you press the accelerator, get your regulator checked
  • Other signs include poor mileage, odor of gas in the engine compartment, failed emission test or the check engine light is on.
  • Please note that if the malfunctioning fuel regulator is situated in the tank region as a part of the fuel assembly, it can leak fuel in the engine and pollute the engine oil too.

Look out for these too

If you observe any of the tell tale signs mentioned above, immediately contact an expert mechanic or professional auto repair services for inspection. They will check the pressure regulator for leakages and accurate operation and any broken vacuum lines. If the regulator is bad, it will have to be replaced. If the engine oil is contaminated, this too will be changed and filtered. Don’t forget to test drive your vehicle for confirmation.


So you see how crucial is your car’s fuel pressure regulator for the optimal functioning of your engine. We recommend that you pay heed to signs like fuel leakage, low mileage, gas smell, etc. We at CarDekho would be happy to help you get the issues associated with your car’s fuel pressure regulator fixed. All you have to do is log on to services.cardekho.com.