Skip the auto shop - Our mechanics make house calls

Q: If a mechanic put one of the fuel injectors in the wrong cylinder, could this damage the ECU?

asked by on

Two out of 4 injectors were reconditioned but the mechanic put the injectors back incorrectly and reprogrammed them to the ECU, even though this problem has been resolved, the car is not now running well and I am wondering could the ECU have been damaged by previous mistake?

My car has 120000 miles.
My car has a manual transmission.

A: Hello. The ECU could not have been damaged ...

Hello. The ECU could not have been damaged by moving injectors to different cylinders. The injectors are not programmed to be in a particular cylinder of the engine. Having only two injectors reconditioned is the most likely cause for running bad. You should have all injectors cleaned to be the same flow. Only one injector not flowing as much fuel as the other three will cause the engine to run rough.

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・Save up to 30%

Get a quote

What others are asking

Q: Something is draining the new battery

Hi there, thanks for writing in. Once the car's engine starts, the job of the battery is finished as the alternator takes over the responsibility of powering all components and accessories on the vehicle. In some cases, a new alternator...

Q: Car has no power after sitting over night.

It sounds like your 2010 Honda Civic may be experiencing what is known as a catastrophic failure of the blower motor. This type of failure may place a drain on your vehicles battery, one of the symptoms you are experiencing....

Q: Rough idling, engine shuts off

Hey there, thanks for writing in about your 2005 Buick Rainier. This could be a variety of possibilities, but what you are describing sounds like a faulty O2 sensor. The O2 sensor relays information about the air/fuel mixture to your...

Related articles

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 to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...