Cylinder 1 Misfire

[Zac]

have a dead miss on cylinder 1.

I have spark, I have fuel and compression is great.

Tried a couple of injectors and it was the same.

Continuity on the injector is good, and i'm getting 14v to it.

Tried 2 sets of plugs and wires, all did the same.

I have air fuel and spark, what else am I missing? All the 3 other cylinders are firing just fine.

[ouch1011]

What was the compression on cyl 1 compared to the others?

Certain valvetrain problems can be difficult to detect with just a standard compression test. Even a small difference in cranking compression could indicate a valvetrain problem. Or you could try a running compression test. You should be able to find details for that from a google search or I can explain it to you.

Also, have you verified you are getting the switched ground from the PCM to the #1 injector? Does the #1 plug get fuel soaked after running for a bit, does it change color at all, or does it just stay clean and dry?

[Zac]

yes the plug is wet with fuel, all compression for all the cylinders is the same.

[jey]

Coil pack might be going out

[ouch1011]

Because of the way that 1 coil fires 2 plugs, it is very rare for a bad coil to cause a miss on only 1 hole.

[Zac]

tried my spare coilpack and it does the same thing, now cylinder 1 and 3 wont fire!