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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

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1997 GM TBI 5.7 : Idle too high
Hi there. Check for any vacuum leaks that the engine may have. Look for any vacuum hoses or ports that are not connected. Vacuum leaks on the engine will contribute to the engine having a higher idle. If the vacuum...
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Getting fuel, getting spark, and won't start.
Check the ignition timing on the distributor and see if the timing is off. If the timing is good, then the accelerator pump in the carburetor or the fuel injectors are not working properly (if your vehicle has TBI injection)....
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Can you put spark plugs and fuel injectors from a 1998 4.6L Expedition into a 2001 4.6L Expedition? (an auto parts store associate told me I could)
The spark plugs will not make any difference with the engine performance, however, the fuel injectors are different and will cause the computer to not operate the injectors properly. This is why the engine light came on with all of...
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Could this cause ur car to stall in warmer weather? My car never stalls during winter months. But from spring on its a neverendin
You should have the check engine light and engine scanned to see if the engine may be running lean due to low fuel pressures or clogged injectors. You should also have the mass airflow sensor cleaned and checked for proper...
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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
Fuel problem?? 1993 Chevrolet S10
Hi there - I'm thinking there are a couple of possibilities since you have identified what is clearly a ["running too rich"](https://www.yourmechanic.com/question/fuel-rich-smell-from-car situation. Leaking fuel injectors could cause this problem, high fuel pressure, or a faulty coolant temperature sensor signal...
Question
Only runs if I do a small burst of starting fluid or splash about 2 table spoons of fuel down the air filter tube.
Hi there. The issue is either the fuel injectors are not firing or the fuel pump is not delivering fuel to the fuel rail. Check to see if the fuel pump is working by putting a fuel pressure gauge on...
Question
I am trying to change a fuel injector and I have taken every bolt out of the engine cover but I can not seem to get it off.
The injectors on your engine are mounted on a common "rail" and the rail has to come off to change any one injector. Once all of the bolts are out it may be stubborn if the injector O rings have...
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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...
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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
I installed the engine but has no fire to injectors or coil pack. Changed the crank sensor and cam sensor. Checked timing belt and everything is all okay.
Check the spark plugs and see if there is park on them as the engine is cranked over. If there is spark, then the ignition coils is working. Check the fuel injectors and see if they are getting fuel to...
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
Probably it feeds too much gasoline and don't respond to the accelerator pedal. Then the engine stops.
Check the fuel pressure and see if you have 30 psi or more at the fuel rail. If there is fuel pressure, then remove the fuel injector harness to each injector and check for power as the engine is cranked....
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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
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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My Lincoln ls 2004 has 9 codes at onece
Hi there. Your vehicle is in a lean mixture state. The fuel system is not supplying enough fuel to the engine. Check the fuel pump to see if its working by putting on a fuel pressure hose on the fuel...

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