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Old 03-01-2005, 04:33 PM   #1
cheese tits
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Join Date: Jun 2003
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2000 impreza

Default running lean with cobb 2.5?

i have had a cobb stg 2 for about a year now, and when i went to change my spark plugs last week(which was a bitch by the way) and my plugs were frosted on the tops(i am under the assumption that means youre lean). Now i am running a BOV but i thought that would just make me run rich. I also have a EBC but i never run over 17.0psi and the ebc i install about 2 weeks ago so i dont think that could be it, everything i have is on the cobb stg2.5 list ... suggestions?

ps i used to live in florida but recently i moved my vehicle to el paso,TX where the air is a **** load thinner(im in the military)
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Old 03-01-2005, 04:41 PM   #2
bren wrx
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'10 E92 M3 M-DCT
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pull one of the new plugs after a week. get an egt gauge or wideband.
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Old 03-01-2005, 04:45 PM   #3
cheese tits
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why an egt or wideband o2? pardon my stupidity
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Old 03-01-2005, 07:56 PM   #4
jugger
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the wideband instantly tells you what the Air fuel ratios are....lean or rich or just right

the egt tells you how hot the gasses being burned and pumped from the pistons are...if there at ~1600 F to 1650 and above then that can sometimes indicate a lean mixture

if there are tiny balls of alluminum melted on the spark plug then that can indicate knock
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