Q: Vehicle hard starting & fuel economy issue.

asked by on October 09, 2016

Good day, I own a Peugeot 406 & lately fuel spells in my car, more so, I experience hard starting & my fuel economy has dropped. Just few days ago, I was driving home before my vehicle engine went completely off so I had to call a mechanic to tow the vehicle home. A day after, I was told that the fuel pump was bad and that I have to replace it which I did but after that, I still experience hard start. More so, fuel spells inside the car whenever am driving. Please I will appreciate your advice & suggestions.

Check for proper fuel pressure - both while the vehicle is running, and after running. I suspect you will find that fuel pressure is not being maintained in the pressurized portion of the system due to a fuel pressure regulator - which can also leak fuel (o-ring leaking). The inability to maintain proper fuel pressure overnight means the fuel pump has to work longer, while trying to start your engine, to get up to anything close to operating pressure so the engine will fire. Check the fuel filter for clogs as well. A clogged filter will hamper both startup and fuel pressure while driving. A YourMechanic certified technician can perform a Car is hard to start Inspection, or a Car is getting worse gas mileage Inspection, on your vehicle to help diagnose and repair this issue.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

My car had a hard time starting. 2008 Suzuki SX4

Hello. Depending on how hard the starting was would help me to determine what is going on. If the engine just had a hard time cranking then it may be a problem with the battery or the starter. It may...

How do I use the Instantaneous Fuel Economy setting?

The driver information center (DIC) provides a large amount of information to the driver. At any time, you can select what information you would like the DIC to display. To select the Instantaneous Fuel Economy setting, press the Menu button...

Car starts but dies when the gas pedal is pressed

Uh oh - this isn't good. It is likely that some of the contaminated gas may still be clogging other fuel system components, and needs to be chemically cleaned out - fuel filter, fuel lines, fuel pressure regulator or injectors...

Related articles

Symptoms of a Bad or Failing Mass Airflow Sensor
Common signs of problems with a mass airflow sensor include running rich at idle or lean under load, decrease in fuel efficiency, and rough idles.
5 Essential Things to Know About Hybrids
The The growing popularity of hybrid vehicles has led many to start wondering whether it might not be time to make the switch. Here you’ll find out five essential things you need to know to help you make your decision...
What Happens If I Overinflate My Tires?
It is a common misconception that overinflating your tires will provide more responsive handling and greater fuel efficiency. In fact, over-inflation is...