General tuning question - fuel economy

[JTesta1966 at aol.com]

In a message dated 6/13/00 3:10:46 PM Eastern Daylight Time, 
smarteney at xlvision.com writes:

<< e the O2 sensor, hence gas mileage goes down.  How do I compensate, or
 can I?  I noticed there are some Hiway mode parameters, such as Hiway spark
 add (?), in the 165 ECM that I could take advantage of.  Or, is the only way
 to get better mileage mean changing the target AFR? >>

In my GN, I run 16.2:1 Hiway mode AF ratio and in the lower load sections of 
hiwat Mode Spark Advance, I added 4* timing. Added 3-5mpg on the highway, 
depending who of my friends you ask

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Jim Testa                                                         TType86 on 
#BuickGN
ASE Master Technician                                     
buick.fiendish.net:6667
L1 Advanced Engine Performance                          NJ Lic MV Inspector
jtesta1966 at aol.com                                  NJ Lic Emission Repair 
Tech
http://members.aol.com/jtesta1966/buick.htm
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