(Stock 84 GSL)

Just because I do it every once in a while, I removed my plugs yesterday to check 'em out and clean 'em. First, I noticed that ALL of my plugs were exactly the same. Denso is the brand, and I can't remember the numeric sequence, but something with a w and a 25 and a 14. Either way, both leading and trailing plugs were all the same. (I thought they were supposed to be different?)

So, that's my first simple question.

The 2nd one is, ALL the plugs (except the leading plug on the rear housing) had 3 white tips and one black one (one of which was a tiny bit wet.) The very first time I pulled them out (about a month ago) they were all a light, creamy reddish color but no black at all... that's just for an FYI.

And also, Saturday, I discovered that my OMP hasn't been working (for who knows how long) so I just started pre-mixing Sunday. Don't know if it's related to the ONE black tip on the plug, but there's more info for what it's worth.

So, the two questions... 1, should I have two different numbered plugs or am I ok with how it is now? and 2, what does the ONE discolored tip on 3 of the 4 plugs mean if anything?

Thanks in advance!

Jeff

 

lots of views, but no suggestions?

 

On question number 1, all spark plugs should be the same.

Blackness in spark plugs indicate too rich a mixture. But per your description of the plugs they look fine. You should see mine!

P.S. You might wanna correct your profile. It says you have a 1994 RX-7.

 

oops...... guess that was just wishful thinkin'

 

are you still needing the firing order?