Skip the auto shop - Our mechanics make house calls

Q: What are the effects or symptoms of bad fuel injectors?

asked by on

Vehicle has lost of power. Believe it's a misfire to cause jerking. Sometimes bad fuel economy.

My car has 223000 miles.
My car has an automatic transmission.

Hello. A bad fuel injector can fail closed, fail open or not seal when closed and can work normal but have reduced flow from blockage. A fuel injector that is failed closed will cause total misfire all the time on that cylinder. A fuel injector that is stuck open or leaking seat will flood or run rich the cylinder. A clogged or low flow injector can cause surging, low power or misfire in cylinder. Only a stuck open injector will cause bad fuel economy. A certified professional from YourMechanic can come to your car’s location to inspect the loss of power problem and let you know what should be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car turns off while driving normally on the highway

Hello there. You have a few different problems going on with your 2006 Volkswagen Golf. The injector open circuit code indicates that that the fuel injectors are not receiving the power they need to function. The camshaft code could be...

Q: Bad gas mileage

Hi there. The fuel mileage is never great in this car, but this is rather low. Most of the time if it is running fine and has recently dropped off it is because or a dirty air filter or a...

Q: I keep getting a cylinder 3 misfire code P0303. I have replaced the spark plugs and ignition coils and have had no luck.

Hello There, You may want to try checking things like mass air flow sensor, fuel pressure, injector connections/pulses, etc. Often times, when these components are not working properly or causing a lean fuel condition, this may cause a misfire...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...