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				o2 or c
			 
 
			on a cis system with out an oxygen sensor is  it best to set up the mixture with o2 or carbon monoxide?  seems like the LM-1 instrument measures O2 and the gunston gastester measures C.  Which device would you purchase and/or use for mixture adjustment?
 gary
 
				__________________1975 911S Targa
 Silver Anniversary Edition
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