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.

A: Hello. A bad fuel injector can fail closed,...

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: I just need to know how long it will take to replace a fuel injection throttle body

Hey there. The labor to replace the throttle body and relearn the idle calls for 1.5 hours labor. This does not include any other work or diagnosis time that may be needed to complete repairs.

Q: Eco light in dash

The most common problem with these vehicles I have seen with the Eco Light flashing is a problem with the transmission solenoids. The transmission will need to be scanned to see if which solenoid is having problems in the transmission,...

Q: Cylinder 2 Misfire, and water contamination in the fuel.

Hello. If your fuel was recently contaminated with water then that is likely the reason behind the cylinder 2 misfire. As the fuel travels to all of the cylinders, this leaves them all susceptible to misfires, as well as the...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...