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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.
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
P0306 code misfire
Hello there, many common faults will cause a cylinder 6 misfire in your 2001 Chevrolet Impala. The most common faults are the spark plugs, plug wires, fuel injectors, vacuum leak, fuel pump, or low cylinder compression. A qualified Technician such...
Question
injectors only spray 3 times and quit.
Hi there. Check to see if the security system is active. The injectors will stop working if the security system is active. If so, then check there are some damaged wires to the passlock switch on the steering column. Remove...
Question
Why the Fuel pump relay will not kick in using the key switch
Hello - The fuel pump power path includes the fuse, and the fuel pump relay (triggered by the ignition switch). The injectors are fired by the engine control module (PCM for Ford fans). There are 2 potentially separate issues here....
Question
Cylinder 2 injector control circuit Renault Scenic 2
Hi and thanks for contacting YourMechanic. The code P0202 is what shows for a cylinder that has lost connectivity to an injector. Either the injector has failed or the injector wiring harness has an issue. Check the cylinder 2...
Question
Can a 2000 dodge caravan fuel injector wiring harness be used on a 1999 Dodge Caravan, engine being a 3.3L 6 cylinder flex fuel.
Hi there, thanks for writing in. To my knowledge, Dodge did not make significant changes from the 99 to 2000 Caravan 3.3 liter engine. However, with that being said, it's hard to know for 100% certainty that the fuel injector...
Question
Cruising steadily, loss of acceleration, and engine cutting out
Hi there. One of the most common issues with early 90's diesel engines are the fuel injection pump's o-ring can dry out or crack overtime causing fuel pressure and delivery issues. Although it's possible to rebuild the fuel pump,...
Question
Bus not starting
Hey there. This may be caused by a few different things which all seem to indicate you have a fuel supply problem. This may be caused by low fuel pressure, dirty or faulty fuel injectors, low voltage to the fuel...
Question
My truck jumps and shakes when accelerating
It is possible for problems with the ignition system to cause this issue, including spark plugs or ignition coils not firing under load. You should have a scan for trouble codes done to check for codes related to the misfiring....
Question
My truck keep cutting off I changed the fuel injector and it still cutting off like its not getting gas I don't know
Hi there. If you've removed the fuel lines and are not getting efficient flow of fuel to the throttle body or the direct fuel injectors, you most likely have a fuel pump problem; that if not replaced soon will eventually...
Question
My truck was running perfectly yesterday, but this morning it won't start.
When you attempted to start the vehicle this morning, did the starter attempt to crank the engine? If not, the issue is likely the starter. Although they can display signs of wearing out, they can also stop working suddenly. If...
Question
Gas consumption on my car.
Hi there. The readings that you are getting with the MAP sensor is correct. Since your vehicle is burning fuel like crazy, check the fuel filter for if its dirty. Check the injectors for if they are sticking and draining...
Question
My car jerks when decelerating or cruising in slow speed.
Hey there. This may be a sign of a dirty or failing mass air flow sensor. The mass air flow sensor is a unit in the intake system that monitors air intake as it is mixed with fuel prior to...
Question
Misfire on my engine and I am getting an injector code 27. (OBD1)
Hi there. The injector output driver is not responding properly to the control signal. Check the wiring from the computer to the injector driver. If the noid light is flashing erratically, then the controller (computer) is not functioning correctly. You...
Question
The Check Engine Light came on, I hooked it up to my scanner and got the code P0308
Hello. A cylinder misfire can be caused by many things. If you are not able to notice any issues with engine performance then the misfire is likely minor or intermittent. A few common causes for a misfire are a faulty...
Question
My car won't start up
This can be caused by many different things, some of which may be related to a lack of spark and some of which may be related to a fuel delivery problem or a combination of both. For example, if the...
Question
My gas mileage has dropped to 22 mpg, what could be the cause?
When a vehicle gets poor fuel economy, it's typically due to an electrical sensor that is faulty, such as the oxygen sensors, the air fuel ratio sensor, dirty fuel injectors, or the throttle body being dirty. Driving habits can also...
Question
My truck runs for a few seconds then dies
When you have low fuel pressure but recently replaced the fuel pump and relay, the issue is typically vacuum-related or caused by a clogged or worn out fuel injector. The vacuum issue may be related the the EGR valve or...
Question
Do I need fuel injector flush
If you have never had the fuel injectors service or you are having problems that need the injectors flushed then it should be done. If you are not having any problems then running good fuel and additives in the fuel...
Question
Fuel injector.
Hello, the fuel injector circuit has a ground side and power side. 12 volts would be on one side and the ground side is pulse width modulated (a variable voltage signal) controlled by the computer. A series of tests would...
Question
My engine has a rough idle. It spits, sputters, and stalls out. Could it be a bad injector?
Hi and thanks for contacting Your Mechanic. Yes an injector could cause an engine to spit and sputter or even stall out. Injectors over time can become dirty from the contaminate in the fuel tank that when passed the fuel...

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