2003 A4 1.8T Quattro 5spd, stock w/ test pipe

I have code P0301 (misfire Cyl 1) and the CEL is blinking, the car idles very rough.

Things I tested:

- Swapped plugs
- Swapped injectors
- Swapped coilpacks
- Swapped MAF

* Misfire was still in cyl 1

Compression Check:
Cyl1 - 117
Cyl2 - 150
Cyl3 - 150
Cyl4 - 150

Even though Cyl 1 is low, would that be enough for the car to shutdown the cylinder and persist with misfire in cyl1 ?

Note: The ecu on the car is from another car and I had someone remove the IMMO.

Any chance the ignition control on the ECU is bad? I know the B6 has the ICM,etc.. built into the ECU

 

Do the Walking coils, walk the same coil after all cylinders to see if the random missfire code changes... or you can go for broke and change all four of them at once and say good bye to the problem.

 

The coilpacks are a few months old from the recall, I also moved them around, but the misfire code was still P0301

 

Low compression is bad juju..... If you have lower compression in the same cylinder that misfiring, and you did the right process of elimination. Its just leading up to something you don't want to hear. They make cheap exhaust analyser kits you stick in the coolant.

Head gaskets aren't all that uncommon on 1.8's

 

It's strange b/c I had my buddy put in the head and bottom end, of course with a new headgasket. The motor was from a 60k mile car, I wonder if the valve was slightly bent to begin with