2G Misfire on #2 - P0302, Nothing left to change! Help a 1996 Eclipse GSX

[Scottinalaska]

1996 Eclipse, automatic, completely stock
Code: P0302 - Miss on #2 cylinder.

All four NGK plugs and wires are new.
Fuel pressure: in spec at 45psi at all RPMs
#2 Spark plug is black, appearing rich condition while other plugs are more white in color showing good burn.

Replaced Coil that operates #2 and #3
Cleared codes and drove. Miss on #2 remained.

Swapped fuel injectors #1 and #2.
Cleared codes and drove. Miss on #2 remained.

Swapped ALL new plugs putting #2 plug into #4.
Cleared codes and drove. Drove fantastic for 2 miles, then miss started again. Miss on #2 remained.

Swapped plug wires (new) between #2 and #3.
Cleared codes and drove. Miss on #2 remained

Compression check: #1: 180, #2: 160, #3: 190, #4: 145

90 octane gas. Fresh oil change.
Is there something I have missed? Compression isn't even. Is oil causing a misfire? Ideas? Thanks!

 

[Scottinalaska]

Well, as it turns out, there was one more test I did not do: A leak down test.
Recall my compression numbers here:
#1: 180, #2: 160, #3: 190 #4: 155
Now for leak down values at 75psi:
#1: 11, #2: 11, #3: 74 #4: 44
WOW!
#1 leaks into # 2 spark plug hole
#2 leaks into #4 spark plug hole
#3 leaks no where
#4 leaks into #3 spark plug hole and maybe a bit into the intake.
I am thinking the head comes off no matter what. Is the gasket just failing? Cracks?
No overheating issues. No bubbles in the coolant.
Thanks!

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[delta448]

Scott, I hesitate to ask because I don't want to insult you, but did you rotate the engine by hand to make sure all the valves were closed on the cylinder you were testing? Usually when I do one of these, I pull the valve cover off and pull all the rockers out so that I know the valves can't possibly be held open anywhere.

 

[Scottinalaska]

Yes, by hand. TDC every time.
You can see the screwdriver in the mating hole in a couple photos up out of the cylinder resting on the piston top (1&4, 2&3).
With #1, I used the crank marks as well.
Thx for being bold to ask. I'm bewildered how she ran OK at all!
Scott

 

[BLACK'98DSM]

What's the mileage on this engine?

 

[Scottinalaska]

120K

 

[delta448]

I'm baffled by the compression test results being higher than standard in 2 cylinders, the mechanical timing being correct and the leak down being so terrible. If you hadn't just done the timing belt, I'd swear it was off at least a tooth.

At this point I think you're going to have to pull the head. I won't even venture a wild guess at what you'll find.