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Old 09-21-2004, 12:46 AM   #1
Crash477
Scooby Guru
 
Member#: 49881
Join Date: Dec 2003
Chapter/Region: South East
Location: Knoxville, TN
Vehicle:
2006 Subaru STi
1989 BMW 325is

Default Running rich/lean?

so how do I tell if im running rich or lean? I noticed the other day that if i smell my exhaust, it smells like gas.

thanks

steven
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Old 09-21-2004, 01:25 AM   #2
Kevin Thomas
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Location: 1997 OBS, 1996 SVX, 1988 RX
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1989 1989 XT6

Default

Quote:
Originally Posted by Crash477
so how do I tell if im running rich or lean? I noticed the other day that if i smell my exhaust, it smells like gas.

thanks

steven

Hello Steven,

Pull out your spark plugs and look at them.
Go to this website:
http://www.bullittarchive.com/Mainte...g_Spark_Plugs/

Or another like it and compare you spark plugs to theirs.

A lean condition would have the spark plug have a whitish color on the tip of it or the tip will be damaged from detonation.

A rich running engine would have carbon build up on the spark plug.
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Old 09-21-2004, 01:37 AM   #3
Crash477
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Join Date: Dec 2003
Chapter/Region: South East
Location: Knoxville, TN
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2006 Subaru STi
1989 BMW 325is

Default

Thanks Kevin. I will have to check that out as soon as I can get some tools. I'm at school, and dont have my tools with me.

Steven
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Old 09-21-2004, 04:37 AM   #4
Al_Smokemcrack
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Glacier White

Default

You can tell rich and lean by the smell and by how the engine runs too. I'd describe it, but I'm kind of at a loss as to how. Rich running engines smell...like they're running rich. The easiest way is to check the plugs, though.
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Old 09-21-2004, 11:22 AM   #5
Crash477
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Member#: 49881
Join Date: Dec 2003
Chapter/Region: South East
Location: Knoxville, TN
Vehicle:
2006 Subaru STi
1989 BMW 325is

Default

if i had to guess, i would say my car is running rich from the smell. but i will do the spark plug trick soon.
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