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Symptoms of a Bad or Failing Fuel Injector
Common signs include an odor of fuel in the car, engine performance issues, and the Check Engine Light coming on.
Symptoms of a Bad or Failing Cold Start Injector
Common signs include hard starting, a decrease in fuel efficiency, and engine performance issues.
Symptoms of a Bad or Failing Injector Control Pressure Sensor
Common signs include starting issues, engine misfires, the Check Engine Light coming on, and a decrease in power, acceleration, and fuel economy.
What Causes Fuel Injectors to Get Clogged or Dirty?
Fuel injectors deliver fuel into the cylinder for combustion. Clogged fuel injectors can be caused by debris or impurities in the fuel.
How to Ensure Fuel Injectors Are Receiving the Correct Voltage
Faulty fuel injectors affects fuel economy and can cause a misfire. Make sure your fuel injector receives enough power to work properly.
How to Replace a Fuel Injector
Fuel injectors are faulty if the smell of fuel is present in the vehicle, you have engine performance issues, 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 Cold Start Injector
The cold start valve fails when there is leakage coming from the fuel line. The cold start injector may have failed if the vehicle does not start.
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
Must you replace all ignition coils or faulty ones only for 2010 BMW 550i GT?.
Ignition coils can be individually replaced without concern as to engine operation however fuel injectors are a different matter. If you replace one fuel injector, the other 7 fuel injectors should be removed from the fuel rail and professionally cleaned....
Question
I have a 97 jeep Cherokee thats has been running rough. It smells like gas when I drive for awhile and then this morning after dri
From your description, the cylinders are being oversupplied with fuel. If the fuel trims (from a scanner) are high negative, for sure there is too much fuel and a diagnostic would be required to determine why. Just as an example,...
Question
What causes fuel injector fuse to blow in a 2007 Cobalt?
Yes, you are absolutely on the right track but to complete the diagnostic job you will need the complete circuit diagram (Factory Service Manual, for instance) because you will have to test all the different segments of the circuit until...
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
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
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
Cylinder 5 has a misfire.
Hi there. To determine if the injector is not working properly, either you can perform a cylinder cut out test on your injection system or you can swap your injector on cylinder number 5 with another cylinder and see if...
Question
White smoke ticking not overheating
If you have white smoke out of the exhaust and are not getting low on coolant then you may have a cylinder that is low on compression or not firing. Have the misfiring cylinder compression checked on that side of...
Question
Rough idle and there is a raw fuel smell coming from the exhaust.
If the spark plugs were replaced and there is too much fuel in the exhaust system, then the injectors are leaking and not spraying (atomizing) the fuel properly. A leaking fuel o-ring will make the fuel puddle up outside of...
Question
My car starts in the morning with a sputter.
The noise could be either an ignition coil misfiring and causing the engine to stall on a cylinder making the engine sputter or the engine is sputtering with an injector that is sticking until it get hot as it maybe...
Question
P0300 and P0305. Pending: P0304, P0306, P0171, P0174, P2196, P2198
Hi there. The issue that maybe happening is the are fuel injectors that are not firing and there is a vacuum leak on the engine. Possible multiple sensors are not working causing the P2196 and P2198 codes to appear. For...
Question
Got gas in my oil
If you are getting fuel into the oil then you either have a leaking injector or fuel pressure regulator. I recommend having fuel pressure checked and check the pressure regulator vacuum line to see if fuel is getting in it...
Question
2007 RR Supercharged. The check engine light came on. Code p0171 and p0173. Oxygen sensor bank 1 and 2. Checked the battery.
Hi there. The check engine light codes are for the engine running lean on bank one and bank two. Check the fuel injectors to see which injectors are not working. A lean condition is when the fuel injector(s) are not...
Question
Shaking on acceleration over 3,000 rpm.
Check the engine for a misfire. Check the spark plugs and see if they are working and if there is park to the spark plugs. If the spark plugs are clean and there is spark to the spark plugs, then...
Question
Q: Can the nozzles of a v4 Honda accord 2008 be serviced? If yes, can it be serviced by using a battery
You can service the injectors on the car with an injector machine only and not a direct battery connection or injectors will be damaged. They are designed to only have intermittent power and ground at the same time and not...
Question
2006 Infiniti G35 has check engine light on for code P0153
Code P0153 is for Air/Fuel Ratio Sensor Slow Response Bank 2 Sensor 1. It's true that this code can be set by one or more failed fuel injectors causing a lean condition, but there are several other potential causes as...
Question
I broke a fuel injector plug in, how do I replace it?
Hello, thank you for writing in. The type of repair you need to do is going to depend on what side of the clip you broke. If you broke the fuel injector side, you will have to replace the injector...
Question
Could a bad fuel injector be making my 2007 Pontiac Grand Prix smell like gas?
It's possible that a leaking injector or injector o-ring could be making your Pontiac smell like gas. These items could also cause driveability issues, such as the ones you describe.There are other potential causes as well though, such as a...
Question
My car cuts off without any warning signs and it was hard for me to turn the steering wheel. It was smoking a little under the hood.
Hi there. The issue may be that when the vehicle was filled up, there may have been trash in the gas tank and it may have been stirred up into the fuel system which may have clogged up the fuel...

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