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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...
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 Far Can You Drive Your Vehicle on Empty?
Knowing how many miles you can drive on an empty gas tank prevents getting stranded. Nissan Altimas can go the farthest when the low fuel light is on.
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
Gas gauge not working
The sending unit in the fuel tank, the instrument gauge (receiving unit) and/or the interconnecting wiring has a fault. To determine where the fault lies, the circuit is simply traced and tested. If the sending unit in the tank turns...
Question
92 nissan maxima stalling problems
You should first replace the fuel filter and see if this helps condition. If filter does not help then have fuel pressure checked to see if the fuel pump is producing enough pressure and have it replaced if below specifications....
Question
72 Chevelle cranks but won't start and has to be flooded but smell no gas
Gasoline is generally not usable after 3 to 6 months. If gasoline has been stored in the vehicle for a lengthy time, the problem is likely that there is just simply nothing to combust. The volatile components in the gas...
Question
I have a 1988 Toyota celica and it looses rpm while idling and tries to die when letting off gas. Black smoke coming from exhaust.
You should have the fuel system checked to see if the fuel pressure is between 34 and 44 psi. If it is too high at idle then you need to replace the fuel regulator. If pressure is good then look...
Question
Significant gas mileage drop after tire change
If the vehicle fuel efficiency has dropped 15%, and there is no obvious explanation, something is wrong. The timing of the tire replacement to the drop-off in mileage is undoubtedly just a coincidence unless the tires are wildly defective thus...
Question
One of my fuel injector burned out what's wrong?
If you are referring to the electrical solenoid within the injector, like any electrical part it can fail due to degradation of the insulation, wire breaks and so forth. The injector can be tested while still on the car and...
Question
What would cause the MPG gauge to fluctuate on a 1999 BMW 323i?
Hello, thank you for writing in. There are several different systems that interact with the fuel system which effect fuel economy. The first that you will want to check is the ignition system. Make sure your spark plugs are new...
Question
To replace a fuel filter or not ? Vehicle had no fuel when bought; added fuel & it started, but should the filter be changed...
Hello, thank you for writing in. Your head is in the right place. While gas these days is held to some better standards, its very possible to collect debris in the tank over time. Considering the mileage on the vehicle,...
Question
My car twice out of 4 times today would not start on the first time. Second time started fine. At 2 read lights it was sort of je
Hello, thank you for writing in. Your symptoms point towards an issue with fuel or spark. If you just had work done on the fuel system, you may wan to have your fuel pressure tested at the engine. This will...
Question
Hi i have a 2003 impala...it runs rough and backfiring after i put bad gas in it...
If the rough running started virtually "instantly" after you bought the gas, of course bad gas is a possibility. You might ask the station if they received reports from other customers. If they did, drain the tank for sure and...
Question
I had a fuel pump,filter,and the gas tank cleaned and lined in my 1985 Cadillac Seville the car is surging it cuts off but crank r
Hello, thank you for writing in. The vehicle may be experiencing a wide variety of issues. Considering the age of the vehicle, the list can get even more extensive. Unfortunately, this is going to be a process of elimination until...
Question
I have a 2007 Suzuki forenza.when I turn the key on fuel sprays from tops of injectors. Any advice?
Leaks from fuel injectors are typically at the o-ring connection on the fuel rail. When you install the injector o-ring, you have to use a liberal amount of engine oil and twist the o-ring in along with the injector. Also,...
Question
1998 nissan maxima wont stay running
Hello, thank you for writing in. When dealing with this type of issue, start simple. For example, you should have the vehicle scanned for diagnostic codes. Even without a check engine light on, there may be codes present that relate...
Question
1976 fuel injected cadillac seville :initial start hesitates,cuts off than starts back up and runs fine after that.
If the fuel injectors have never been serviced, that would be a good start on a car of this age. To do it right the injectors have to be removed from the fuel rail and sent out for cleaning to...
Question
What is the main reason for a random misfire on Audi A6 2002 3.0
Hello, thank you for writing in. Without the codes that are present it is hard to narrow down the possibilities for you. Coil packs and fuel supply are going to be towards the top of the list. You should start...
Question
My car is a 1974 Ford Bronco. I was driving doing about 35 when my car suddenly sputtered and died. Wont idle without foot on gas
Hello, thank you for writing in. The vehicle may be having one of several issues. Due to the lack of self diagnostic programming on the vehicle, it is going to be a process of elimination. You are going to want...
Question
My husbands gas guage has been messing up?
Hello, thank you for writing in. The fuel pump is part of a unit called the fuel module. The module also houses a float that raises and lowers with the level of the fuel. That movement is then translated into...
Question
My car was low on gas. Will start but won't stay on. What could it ve not the starter
Hello, thank you for writing in. There are several reasons why the vehicle would stall under these circumstances. Typically if you run the vehicle out of fuel it does hurt the fuel pump. Beyond burning out the pump, it can...
Question
fuel guage not working.
Hello, thank you for writing in. The fuel pump itself has a level sensor that may have been damaged during the process. It is physical float that rises and lowers with the level of fuel in the tank, and then...
Question
Got hit by the gas tank on a 2000 nissan maxima now axel looks bent. What else might be broken
Hello, thank you for writing in. In the area of the fuel tank and axle, there are likely fuel and brake lines to be concerned about. This is in addition to the components related to the wheel, axle, and fuel...

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