Well I have been tuning and getting better with my 99 305 tpi auto and tunerpro $6e.

I lowerd my injector# to 16.7 with basically stock $6e APYM slight tune to maf#1 table. The car was thne rich at idle but lean up top for BLM in 133. but it was looked maxed out flat line when around 30-50% throttle. Idle would then drop down to 128 then idle rich to 122 range

I finally tweaked maf#2-3 scalars to see if would change before tweaking maf tables and with a few points up in scalar. the BLMs came down in the 1600-3000 range like 129-132.

It still feels leane up top on AE and idle is getting rich especially in drive at 700-900. like 119 r-122BLM.

I realized the scalar for min/max difference from blm from INT was set to both 5 so that was my 133 limit. SO I started looking at INT instead of BLM.

My INT across a short 5 min run was below 128 idle. At start up and after letting off gas it will go rich like 110-118 INT then start to idel up to or sit at 122. then in AE ( i assume) it was 122-127 for most part but still some lean spots in 137 range at specific RPM which I think are all in maf #2.


So I can tweak that I think but my question it seems my INT are showing rich below 128. but BLM in upper ranges are 129-132. which is Lean for BLM. So whcih one do I apply to tune? IE: INT says rich so I should remove fuel but BLM overall (running average from tunerpro) is little lean so do I add fuel?


I am thinking it is rich at idle. I should tweak maf or possibly up injector to get the INT in tune. And I should lock out the BLM for Min/Max ranges? Then do I have to also do something with with blm int allowable difference?

the AE being lean I think appears to be rich at lower rpm and lv8 change but lean at top.

 

my knock retard. (this was higehr then normal) normally in tune just at 176 I saw 1 retard less then 1degree. but here it is. not sure if it is timing or just lean


My INT (ignore injector width)


BLM


is my timing to much for stock 305 TPI

 

For general fueling I use the BLM value. The INT moves around too much.

Although, for AE tuning the INT can be helpful.

RBob.

 

Thanks rob so locking down Blm to tune int is not critical?

What open open loop lock out closed loop by temp scaler the. Just use lv8 and coolant bs afr tables to adjust? Do I still tune to Blm in open loop shoot for 128?

 

Thanks rob so locking down Blm to tune int is not critical?

What open open loop lock out closed loop by temp scaler the. Just use lv8 and coolant bs afr tables to adjust? Do I still tune to Blm in open loop shoot for 128?

 

bump

 

jj,

I used the INT when I had a 7747. But that's because the baud rate was so slow it would take forever for the BLM to change and the frame rate was absurdly slow.

 

The BLM won't change when in open loop. The BLM is used as a basis to adjust the MAF or VE tables.

RBob.

 

Blm for tuning closed loop. Watch int to get an idea what motor is doing. Tiny changes will swing int's a good bit.

Open loop is best with wideband o2. Can maybe use narrow band signal as long as its changing in open loop. It certainly works for wot tuning. 900 mv is a target for wot air fuel. 450-550 part throttle cruise

 

Thanks guys. I am seing 900mv at WOT stabs. Idle is swinging rich/closed 200-1000 all the time at cruise but definitely rich at 700-900rpm cruise little bit of throttle at cruise though around 1400-2000rpm still leans out

idle is rich in open loop until warm then closed loop settles down but still rich.

I mapped my maf#1 table in TP. Pretty good way to look at data. I put the maf#1 flowrates cross the top and RPM down the side and I logged BLM. so I can see at 7-9 range (idle) I am definitely sitting in rich hole around 117-119 average after 10 minutes of cruise. all areas around it are 123-130

above 1600 130-132 under loads.
my volatges when cold warm up is 14.1 but warm it is 13.13.7

I will tweak the ms down for 14volts and and tweak the 7-9 maf#1 table down to get a better idle and cruise.

also SA table in the low rpm/lv8 are anywhere from 4-8 retarded from the OEM spec. maybe why it is rich too and little bit of pop in exhasut (My AIR tubes are disconnected from AIR but still in manifolds. I kinked the lines but I think I still have leaks so some cool air popping I think and also probably some lean issue mid throttle I suspect when the exhaust pressure crosses over from low to hi vaccuum

 

if I am seeing 128 idle less gas smell and goo cruise part throttle I will be in good place, then if AE/PE are still lean I can tweak those or if globally lean or rich it can just tweak the INJ constant.

I am still unclear on Open Look tune. There are 2 tables. OP vs Temp and LV8 change. and in open loop BLM are fixed at 128 correct or do I set it?

so if that is the case basically at idle I am really only tweaking 1 or 2 cells in the temp taple and just lowering the % of AFR change to lean it out?

I guess the lv8 change is the main one for ol tuning? I just lock out CL and play with the various lv8 cells to get AE and WOT rich or lean?