Cylinder two misfire

Hi,

That is where I would start checking. First, remove the spark plug in cylinder two and see if it damages, is wet, or if there is anything odd about it. If it appears good, we need to check the coil for cylinder two.

In this case, switch the number two coil pack with number three. See if the misfire moves to cylinder three. If it does, the coil pack is bad.

I attached a pic below showing the coils. Switch them to see if the miss changes cylinders.

Let me know what you find.

Joe

See pic below.

Spark plug looked good and I switched coil pack and code went away but it’s still starting really rough.

Hi,

If the code went away, see if it returns on cylinder three.

As far as starting rough, do you mean it requires an extended crank time or does it simply run poorly when it first starts?

Interestingly, if it still starts rough (running poorly) and the misfire returns on cylinder two, suspect an issue with the fuel injector. If it does move to cylinder three, replace the coil pack.

Let me know. Also, let me know the specifics about the rough start.

Joe

It runs poorly. No extra cranks. I just replaced everything, and it was running fine for like 2 days and then just started messing up. No code has came back. There are no codes at all, but still running rough.

Okay, here is where I need to go: I have a feeling there is an issue with the fuel injector in cylinder two. Is it possible for you to get your hands on a live data scan tool? If you can, hook it up and at operating temperature, check the short-term fuel trims. I want to see if the computer is trying to lean the fuel mixture.

Normally, I would recommend performing a fuel pressure test and pressure drop-off test. However, I feel you would have had a random misfire code (P0300) because it would affect all the cylinders and not just cylinder two.

Let me know if you can get that. If not, I'll figure out a different path.

Take care,

Joe

I personally do not have one or know anyone with a live data scan tool. I just have a simple obd2.

Hi,

Okay, let's look at this from a different angle. We know cylinder two has a misfire and it is running poorly. At this point, it appears the could wasn't the issue because the misfire didn't move to cylinder three.

Without fuel trims to see if the computer is trying to compensate for a lean or rich mixture, we need to check the injectors. Let's stick with cylinder two.

Take a look through this link and let me know if you are comfortable performing these tests.

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

Let me know.

Take care,

Joe

I don’t have the supplies to do any of those tests. I’m pretty sure I could get my hands on a long screwdriver, but I don’t know when exactly.

Hi,

I understand. As far as the screwdriver is concerned, that is a hit-and-miss test. Sometimes it's really hard to hear anything. Could you get a test light? They are really inexpensive. Anywhere that has an automotive department, such as Walmart, will sell them. Usually, they are under $10.00.

Let me know.

Joe