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

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: My titan recently began to shutter while I was accelerating. When it stopped I couldn't get it to go faster than 40mph.

My first thought is, what code is the TCM (transmission control module) setting? Usually when a vehicle won't go faster than 40 mph, the vehicle has set itself into limp mode. It does this to protect itself from what it...

Q: Dash lights stay on until the car starts running

Hi! We will be happy to assist you. The hood light not working is likely due due to a bad bulb or a loose wire. There are a few things I recommend that a technician inspect to find as to...

Q: Car runs like crap at idle and cold once heats up runs better also says it misfiring on all cylinders

It is possible that diagnostic trouble codes have set and a mechanic should attempt to retrieve those first using an appropriate scan tool. If there are no trouble codes, if you were to request a diagnostic from YourMechanic, the protocol...

Related articles

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.