[Diy_efi] Re: (was: IAC counts) VE tuning issues

[J]

I look at it this way:  BLM's greater than 128 means the ECM is having to 
add fuel to keep the mixture right.  This means it's getting more air than 
it should according to the VE tables, which means the table values need to 
be raised by the appropriate factor.  [(BLM/128)*current VE] is a very good 
formula for finding how much to adjust it.

If you're getting 160 BLM's and you have 80's in the low-rpm VE table, then 
either your injectors are much bigger than the 24# that you think they are, 
or you have a pretty significant vacuum leak, or you're getting a false lean 
reading from the O2.  First thing to do is check for exhaust leaks 
before/near the O2, as that will REALLY screw with your BLMs.  Where did you 
get the injectors?  Are they new or used, and have they been flow tested? 


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