Yellowish/Greenish **** built up on my #4 Spark Plug.

All my others are a little white, which everyone says is a normal, since honda engines run a little lean.

Any ideas as to what is causing the crap on the #4 spark plug?

I just did a compression test. Look for it.. should be on the same page.

----> Compression test on my B17

 

only thing that i can think of is coolant.

 

I think it would have been easier to post your compression test results here rather than link it (the link doesn't even work).

Without viewing the results/thread, I would also say that it's coolant. There's really nothing else it can be.

 

hrm. hows the sparkplug gaskets?

 

sorry.. it wasnt a link.. the results are further down on the page of topics.

my guess is that it is coolant as well.

gaskets are new as of last fall.