These are my Spark Plugs, what could be wrong? I have a 98 Prelude with 50k Miles

 

how many miles on the plugs?

 

50k Miles

 

busted out my haynes manual w/ the spark plug chart

looks like its too hot? could be incorrect plug heat range, over advanced ignition timing, lean fuel mixture, intake manifold vacuum leaks, sticking valves and insufficient engine cooling. just a guess.

 

Too hot.

maybe your injectors are getting dirty....try running some cleaner through there. Also check what ^ guy said before me.

 

damn thats a tight *** camera.... thats some fucked up ****.....

 

Well this is an OEM Spark Plug meaning I haven't changed them since I got the car.. So I highly doubt it's the incorrect plug heat range, lean fuel mixture... Well I always use 91octane, and the Prelude runs rich straight from factory according to people..

I got a CAI around December, and the last time I checked my spark plugs it wasn't still there, if I have a vaccum leak on my Intake Manifold how do I check for this

 

Leaving them in for 50k miles maybe?

 

wow, that almost makes me feel better about my old 91 lude. i burnt a little bit more oil than that but i also have 150k. do you beat you car pretty good? those plugs look pretty bad.

 

I would call it as poor fuel quality, or small amounts of oil are getting into the chamber.

 

Get some new plugs, those are ****. Go from there...

 

http://www.ngksparkplugs.com/techinf...q/faqread2.asp

go here, and compare

mike

 

I would just try changing plugs more often...maybe every 10k