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fuel system

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How to Troubleshoot a Gas Cap Cover That Won't Open
Gas cap covers, or fuel doors, get stuck closed and won't open if there's a faulty internal spring or lever, lack of lubrication, or bent fuel door.
How Long Does a Fuel Pressure Regulator Last?
In order for the fuel system in a car to operate properly, it will need to have the right amount of pressure. The injectors that are mounted in each cylinder of...
How Long Does a Fuel Meter Assembly Last?
Knowing how much gas is in your car is important and can help you to avoid being broken down on the side of the road. The only way that you will...
Symptoms of a Bad or Failing Fuel Filter (Auxiliary)
If your car is hard to start, developing engine performance issues, or has the Check Engine Light on, consider replacing the auxiliary fuel filter.
How to Know What Type of Gas to Use
Your vehicle is propelled by a combustion engine. That means that fuel is injected into the engine’s cylinders in some fashion, where it combusts, or burns, to...
How to Replace a Fuel Filler Cap
A good fuel filler cap safely seals the fuel tank. Signs of a failing fuel cap include the smell of gas, stripped threads, or a cracked cap.
How to Tune and Adjust Your Carburetor
While all modern cars use computer-controlled fuel distribution systems, there are still many vehicles on the road that employ the traditional carbureted method of fuel delivery. Before electronically controlled fuel systems were developed,...
How to Figure Out Which Type of Fuel Gets the Best Mileage
We all want our car to go longer on a single tank of gas. While all vehicles come with a mileage or mpg ranking, mileage can actually vary...
How to Use a Fuel Injection Cleaning Kit
Dirty fuel injectors are a common problem for many vehicles in this day in age. With the exception of direct injected and carbureted vehicles, the vast majority of cars on...
How to Replace a Fuel Gauge Sender
The fuel gauge has a sender that goes bad when it says that the fuel level is different lower or higher than it actually is.
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
How to Replace a Fuel Rail Sensor
The fuel system has a fuel rail sensor which fails when the engine operates erratically, has difficulty starting, or the Check Engine Light comes on.
How to Replace a Fuel Pump Shut Off Switch
The fuel pump shut off switch may be faulty when the Check Engine Light comes on or if the engine suddenly turns off while driving.
How to Clean a Throttle Body
A throttle body needs cleaning when the engine idle is rough, the engine stumbles through acceleration, or the Check Engine Light comes on.
How to Flush a Fuel Injector
Clean fuel injectors help keep your engine running smoothly and efficiently. Clogged fuel injectors result in reduced fuel economy and loss of power.
How to Replace a Fuel Pump Relay
The fuel pump has a relay that fails when there is no audible humming sound as the ignition is turned and when the car cranks after longer than usual.
How to Replace a Fuel Meter Assembly
The fuel gauge assembly indicates your fuel level. The fuel gauge will no longer work if there is an application of reverse charge or corrosion.
How to Replace Fuel Injection Lines
Fuel injection lines transfer fuel from the fuel tank to the car engine. Now made of plastic, fuel lines don't rust and hold up to 750 psi.
How to Replace a Carburetor on Most Cars
A carburetor replacement involves the air cleaner, vacuum hose, car fuel line, and a number of other parts. This complex procedure varies by vehicle.
How to Replace Fuel Injector O-Rings
Fuel injector o-rings prevent fuel vapors from entering the car engine. O-rings for fuel injectors hold up to 750 psi and keep fuel from igniting.

Related questions

Question
thumping sound from rear
Charcoal canisters don't become clogged, although in exceptional cases, they can become saturated with liquid fuel which ruins their ability to store fuel vapors. If the premature shut of the refueling nozzle is occasional that is not an issue but...
Question
is the fuel pressure regulator an engine job? or is nbd?
The fuel pressure regulator is part of the engine's fuel supply system. The regulator is completely separate from any "mechanical" component of the engine. The purpose of this regulator is simply to maintain a specified pressure on the fuel supplied...
Question
Truck cranks but will not start
Of course, check to see if any diagnostic trouble codes have been recorded by the PCM. Check fuel adequacy and pressure (note, "old" fuel can result in no start) and check for function of fuel injectors. If you suspect inadequate...
Question
Fuel Pump replaced now car won't start 2007 Saab 9-3
Hi there - the story certainly doesn't make sense. Excessive fuel pressure won't "ruin an injector", although it will certainly leak and cause high fuel consumption, as well as a rough idle and rough running. Check for problem codes, whether...
Question
My Jeep starts for a couple of minutes but it wont stay running.
Hi there. If the engine is trying to start up and not staying on then the fuel could be jelled up in the fuel tank at the temperatures outside if there is excessive water in the fuel. I recommend putting...
Question
Hey I have a 2000 Buck Lesabre and I'm having some fuel issues I think
Fuel is a possibility but so is air induction particularly the idle air control (IAC) valve. The IAC valve may be sticking which would explain the first symptom you report which is everything was great until you simply put it...
Question
RPM's fluctuate while idling and sometimes it dies. Getting codes for multiple misfires and knock sensor.
Hi there. Check the fuel injectors and see if they are working or not. While the engine is running, unplug one injector harness at a time. If the engine begins to hesitate, then the injector was working. If the engine...
Question
Misfire in cylinder number 8.
Hi there. The issue could be the spark plug not firing on cylinder 8, the fuel injector not atomizing on cylinder 8, or there could be a burned valve or a burned head gasket. Check the spark plug on cylinder...
Question
Fuel injector is not working
Once you check the fuel pressure and then check the fuel injection connector with a noid light to make sure it is being activated by the computer or not. Then you may have a clogged fuel injector and should replace...
Question
What causes me car to be weak when going uphill
There may be a few different reasons for a vehicle to not have power to go up a hill. You need to first determine if it is the engine or transmission problem. If the transmission is not downshifting or is...
Question
Low fuel pressure
Hello. If your vehicle is displaying low fuel pressure then it may be possible that there is an issue with the fuel pump. There are instances where a worn out fuel pumps will still operate but provide lower fuel pressure,...
Question
Sputtering and popping with a loss of power. Most recently died and after driving cat converter was cherry red hot.
Hi there. There could be an issue with the spark plugs not firing causing excessive amounts of hydro carbons (raw fuel) to go into the exhaust system. When excessive fuel goes into the exhaust system, the catalytic converter will glow...
Question
No start with no fuel to the engine.
Hello. A no start condition can be caused by many things. If you have determined that the engine is not getting fuel then that signifies there is likely an issue with the fuel system. I would start by making sure...
Question
Fuel gauge
Hello There, What you are describing is an indication of a faulty fuel tank sending unit. The fuel tank sending unit is a small float type component (or sensor) inside your fuel tank that measures the level of the fuel...
Question
Does any one know how to change the fuel plate to increase power? I know how just don't feel comfortable doing it.
Hi and thanks for contacting Your Mechanic. The fuel plate can be removed by taking off the air intake tubing and removing the screws that hold the plate housing in place. Once the housing is off, you would be able...
Question
I need to know where the fuel cut off switch is at
An auto fuel cutoff switch is a safety feature that is only supposed to activate in a collision. If you merely ran out of gas, or ran low on gas, the status of this switch is probably irrelevant. Nevertheless, if...
Question
Hard starting after replacing fuel pump
The fuel pump replacement and the subsequent hard starting might be mere coincidence. A way to find out is to request a hard starting diagnostic during which the responding mechanic will inspect not only the fuel supply system, but also...
Question
After filling my car w/gas, my car won't start
You will need to have the fuel tank smoke tested to see what is causing the fuel vapors to be getting into the engine when you are filling the tank with fuel. You may have a stuck fuel tank vent...
Question
tbi injectors
If there is power to the injectors, and they make an audible clicking noise (that is, mechanically the injectors are functioning) measure the fuel system pressure and be sure that the pressure is within Factory Service Manual specifications. If pressure...
Question
car won't start and no fuel pressure at rail but great at the filter
If the pressure drop exists "through" the fuel filter, then the fuel filter should be replaced. If the pressure at the exit side of the fuel filter is normal and yet the pressure on the fuel rail is essentially zero,...

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