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Main Area => General GS500 Discussion => Topic started by: jestercinti on August 16, 2012, 05:27:35 PM

Title: Help Reading Spark Plug Color
Post by: jestercinti on August 16, 2012, 05:27:35 PM
EDIT...added a little better picture.  The first one was blurry

Can't figure out if I am lean, rich, or ok:

(http://i1260.photobucket.com/albums/ii569/jestercinti/Plugs2.jpg)

Jetted to 20/65/142.5 1 washer lunchbox with stock exhaust.  800' above sea level in Cincinnati OH.

Any thoughts are appreciated.  Thanks.  jester
Title: Re: Help Reading Spark Plug Color
Post by: salamander on August 16, 2012, 05:32:33 PM
Looks a lot like mine -- a little bit of brown, but mostly white.  I'm curious to see what folks around here say about them, too.
Title: Re: Help Reading Spark Plug Color
Post by: twocool on August 16, 2012, 06:00:44 PM
Uh, out of focus?

Cookie
Title: Re: Help Reading Spark Plug Color
Post by: Janx101 on August 16, 2012, 06:04:03 PM
squint your eyes ... it kinda works!  :icon_rolleyes:
Title: Re: Help Reading Spark Plug Color
Post by: RossLH on August 16, 2012, 06:07:27 PM
White on the hook and electrode = lean.
Title: Re: Help Reading Spark Plug Color
Post by: bombsquad83 on August 16, 2012, 07:02:32 PM
From my little research on this topic, I think it looks lean, but possibly a little rich at idle.
Title: Re: Help Reading Spark Plug Color
Post by: jestercinti on August 16, 2012, 08:34:37 PM
Thanks everyone.  My exhaust valves are TIGHT (just got done checking them).  Wonder if that has something to do with it.  2009 F model 9200 miles. 

Intake RH & LH .05mm
Exhaust LH <.03mm
Exhaust RH .04mm. 

I'll check tomorrow after 24 hours "stone cold" and see if anything has changed.  Was last run 6 hours ago.

EDIT:  So I went from 2.78mm shims on the exhaust to 2.65mm.  Started up, and I noticed some things:

1.  Warm-up is extremely fast now.
2.  Any stumbling when cold is gone.
3.  No more stalling when I slow to a stop sign or a stop light.
4.  Overall runs better.

I was chasing everyhing BUT the valves (air cleaner, rejet, plugs, PAIR removal) and it was the valves.  Will NEVER let it go more than 4000 miles again.  Lesson learned.