Thru search and general reading,I have read to start with fuel
constants, then read somemore and it reads work with the maf tables.
after gathering info vie scanner.To make a long story short,I currently have a t.p.i.s. chip,had 24lb. injectors.Switched to 32lb. injectors and car improved dramatically(same tpis chip doing nothing else.Using a scanner I have learned the blm to be 115/ 125 at idle,int at 108,both numbers improve at cruise(steady)but for learning purposes should I 1st change constant for fuel injector(i've also read the two does'nt necessary match)go scanning,extrapolate,and then go to maf tables?thanks in advance.:hail:

 

Yup, you've already got it lined out the way to go. Shoot for blms of 128 at all gps/rpm.

 

Yes, start with your universal changes first.
You want to make as small as changes as possible to net a given result, so first would be getting the fuel pressure right, and in that process get the injector size correct. Hopefully that will get the drivibility numbers about right, then the battery correction for minor idle stuff, and then you PE stuff. The you can futz around with AE, DFCO cold start drivibility if needed.