Cylinder 2 misfire?

2013 CHEVROLET MALIBU

161,000 MILES • 2.5L • 4 CYL • 2WD • AUTOMATIC

JME0523

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I have a misfire in cylinder 2, I've changed spark plugs, cylinder 2 coil and o2 sensor but didn't help at all. What's the next likely problem?

Feb 9, 2023 at 3:47 PM

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JACOBANDNICKOLAS

AUTOMOTIVE REPAIR CONTRIBUTOR
110,190 POSTS

Hi,

It could be a few things. Did you confirm there is spark to the number two spark plug after replacing the components? If not, do that first.

Here is a link you may find helpful:

https://www.2carpros.com/articles/how-to-check-for-ignition-spark

Next, low compression or no fuel to the cylinder can cause this.

Do this. Disconnect the number 2 fuel injector and check the blue wire with a gray tracer for power. Do this with the key in the run position, and the engine off. See pic below.

Let me know what you find.

Take care,

Joe

See pic below. Note: Checking the injector power is only necessary if you have ignition spark at the cylinder 2 plug. If there is no spark, this isn't needed.

Image (Click to enlarge)

Feb 9, 2023 at 8:30 PM