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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.

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