Not to cross thread but I started this thread about the inj swap and $6e. Now I am several revisions into $6e and feeling good about it and much better then $32b

see it here
https://www.thirdgen.org/forums/diy-...after-inj.html

But now that cold start cranks up using a modded APYM and some ARAP numbers it idles great in drive. Park it idles great but a little high when cold like 1500 down to 1300 then at 900 after several min. maybe 850

I am seeing on the gas BLM drop to 133, no retard, but at idle it bumps back to 150 BLM so I tweaked the MAF tables for the idle and the inj for across the board see progress below, and is this normal to go this low?

IDLE BLM STAB GAS BLM INJ#
150+ 133+ 18.5
146+ 133 18 I also lowered maf#1 by 5% in middle
145 132 17.8

O2 is new nd makes swings especially in drive. at idle it def goes low/lean until it warms up sometimes it goes into open loop in park since lean. but in drive it goes back to normal swings and idles in park drive solid within 50rpm

So is it normal on 88 305 TPI LB9 auto no csi,egr,air?

I am thinking tweak MAF#1 up another 5-10% At idle I sit at 6g/s but afer tweak it shows around 7 now.

And I will lower constant big swing to 17 see if I can get the idle to sit in the 128 not 144. I think the throttle 133 is probably ok since I have not touched AE yet. I am hoping once idle is done I can add AE fuel to make it 128 or slightly rich where I want it.

other question is Open Loop fuel. should I adjust this for park as well? What are good tables to play with?

 

Well I tried lowering the Constant to 16.5 and I was seeing BLM in 119 at idle so I switch to 16.7, tweaked the mad tables 1-3 about 10% up.

So at idle I am seeing 124-129 in the 600-1200 and 32-64LV8 range seems ok and feels good. But with light throttle stabs or load up hill on short cruise al my 1600-2400RPM ranges are in the 133 range still almost no effect from lowering the inj constant?

I tweaked the inj to 16.65 and I noticed some low BLM cell like 122 with 128 all around I assume this was timing so I tweaked timign up at that cell.

So my question: Do I lower the inj. constant down so the upper RPM are closer to 128 and the idle is rich like 110 and then tweak the maf to lean things out? or get idle working and then tweak the upper 133 BLM using PE and AE?

I assume the light throttle cruise between 2000-3000 RPM will be closer to the idle BLM?

Also I graphed the Inj PW vs RPMvsLV8 and I get 1.8PW at 32LV8 and about .5-.7 increase across LV8 increases so 1.8 2.4 3 3.5 4 5 6 from 32-144 and going up in rom it increases about .1 PW per RPM cell

I noticed a few cell that were low or not in linear order of cells around them. at idle (like 400rpm was 2.7PW but 600 was 2.2 and 800 was 2.4 etc)

 

Update: I lowered to 16.68 tweaked the PE and AE numbers and the MAF 1-3

Now I can idle rich in open loop. it swings in and out OL/CL at idle and it idles solid at 800-900 in park and 650-725 in drive. In srive it stays CL

The BLM in idle up to 1200-1400 all are rich in the 119-125 range. So I think thge INJ tweak of a few 0.01 make a differance for idle. Probably 16.7-.72 is probably sweet spot for the idle.

My O2 graph in drive is big swings rich/lean 900 to 100mv but at idle in park it gets very tight and sits around 400mv with smaller swings between 300-600 is this normal?

But my big question is nothing above 1600RPM in the BLM seem to be changing? all the BLM in the upper ranges are 133-132 and when I step on it I can hear it lean the underwater sound. not bad but there.

with my last change the good thing is my knock retards were around 1-4deg from 90-176lv8 around 2000 rpm all but went away. I have only 2 cells instead of 8 now that have retard and both were under 1 degree..

This is stock 88tpi 305. the APYM timing for all the cells in question start going up to 34-37 degree range is this normal for this car or too much you think and also reason it is lean and retarded as well?

 

Bump.

Anyone have any feedback on BLM that seem to be easily controlled lean to rich at idle up to 1600-2000 rpm using MAF 1-2 and Inj Contant yet at cruise and higher RPM like 1600-2800 BLM all flat line at 133?

I think this is all non-PE maybe even AE too and it all stays in closed loop. It does occasionally drop into open loop at idle