Injector failure

HENRIK2384

MEMBER
2003 RENAULT CLIO
1.5L
4 CYL
TURBO
2WD
MANUAL
160,000 MILES

My car will only start when putting some starting spray in the air filter. Also, if it's running, I need to press the accelerator the whole time, otherwise it dies. I checked the camshaft sensor. A friend of mine told me, that the car is only running on 2 cylinders(1. And 4. ). We went to a mechanic and he told me that 2 injectors are broken. Could that definitely cause these problems? How do injectors even break?

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,874 POSTS

Welcome to 2CarPros.

It is unlikely that two would break at the same time, but I guess anything is possible. Usually, an injector will plug with dirt. Also, they have an electrical component to them that can also fail.

As far as causing a misfire, if an injector isn't working, yes it will cause it. Here are a few links you may find of interest:

https://www.2carpros.com/articles/how-fuel-injection-systems-work

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

https://www.2carpros.com/articles/how-to-replace-a-fuel-injector

If you decide to check an injector, here are a few links you may find helpful:

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-wiring

Let me know if this helps and answers your questions.

Take care,
Joe