The spark plug not firing due to the coil will not make the spark plug darker?
Why are the two plugs on the other coil (cylinders 2-3)the right color?
Afr's during boost are 11.8-12.2 till Redline assuming it's not misfiring or blowing out spark, whatever you want to call it. Cylinder compression is 195-200-203-198 from 1-4, injectors are a fresh set of fic 1800s that were cleaned, tested and flowmatched within 1%

 

No, it won't.

 

Ah so every fouled plug caused by a faulty ignition source whether it be bad points, bad distributor or coil has really been due to a bad tune
Damn.
You should file a lawsuit against automakers for having such ****ty factory tunes

 

When there is incorrect combustion due to insufficient/incorrect spark flame, deposits of the unburnt mixture can be found on the face and tip of the spark plug. When there is excessive fuel due to a faulty injector/s the plug face and tip will be "washed".







Marios

 

Exactly. The plugs aren't washed looking, they're a dark brownish/black and look like they're covered in soot.
And it's cylinders 1,4. It's very strange that my afr's are so far off that two spark plugs (cylinders 2 and 3)are proper color, others are improper color(1 and 4) and they happen to be on the same coil, but it's tune related.. Weird

 

If it is just on the 1 and 4 cylinders or on any other but not in all 4 then obviously it is not the tune, when afr is the culprit and affects the plug it happens in all 4 cylinders.






Marios

 

Tell that to RightSaid fred lol

 

I'm pretty sure it's the coil as now its starting to miss at idle. Hopefully gonna get the COP kit installed today.

 

As far as I know they're the original coils and they've got 167k miles on them.

 

You've probably got broken ringlands and the fouling is from oil.

If a brand new plug is fitted and it doesn't fire, it'll come out looking exactly the way it came out.

However if you've broken the pistonAND it doesn't fire it'll come out covered in oil.
If it's firing, it;'ll come out covered in burnt oil.



So?
Are you going to post pics of plugs or not?

I guess that's a no?

 

How would it burn oil and not smoke? At all?

 

And did you miss the part with the near 200 compression on all cylinders?

 

And which one is it? Is the tune bad? Or are pistons broken? Make up your mind guy.

 

Your compression numbers are too high.

Broken pistons and the resulting oil usually makes the numbers go up, not down.




You're the noob asking the questions, I'm just giving the answers.
You just don't like the answers.

 

Bad tuning causes broken pistons.

Cause and effect.


The next effect is a "part out".