A9L2 Tune into 8LD EEC progress

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Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Wed May 08, 2019 5:10 am

Been away from this for a while and now getting back into it.

I am looking to dial in WOT without a wideband as outlined in the Fuel writeup. Just want to check ... the Fuel write up states:

you must ALSO disable the OL vs RPM and OL vs ECT functions from forcing you into open loop the easiest way to do this is to set the time delay scalars to 20 seconds

The Tuning Tips and Methodology says (edited for GFUX):

How to stay in Closed Loop at WOT

1999- FN320A Open Loop vs ECT Set y-axis to maximum (200 or 2.0) Forces open loop when perload is exceeded
1993- THBP5 OL TPREL Threshold set scalar to maximum (5.12v or 1020 ad cnts) forces open loop when tprel exceeds this value

GUFX uses FN320A and THBP5


So is it just the FN320A and THBP5 that will cover this for the A9L? Is there any way to check that we are staying in C/L at WOT? Just to be sure.

Once this is done, is WOT fuel dialled in just like the rest of the range? By looking at the FE% over the course of a WOT run.
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Re: A9L2 Tune into 8LD EEC progress

Unread postby decipha » Wed May 08, 2019 7:08 am

yep
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Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Thu May 09, 2019 3:47 am

Cool, thanks.

So I made these two changes and did a short WOT pull up the road. I note though that the WOT flag was still set in the log. The fuel writeup suggests this shouldn't happen - did I miss something?
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Re: A9L2 Tune into 8LD EEC progress

Unread postby decipha » Thu May 09, 2019 9:24 pm

on the newer strats the wot flag forces open loop on the older strats it doesnt so its no big deal

did it stay in closed loop?
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Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Fri May 10, 2019 4:02 am

How can I confirm that it stays in closed loop? I have the FLG_OLUP flag on my dashboard but it never changes.

LAMBSE values were moving around a little during the pull and KAMs were consistent at 1.000. Here is a summary for the WOT log:

WOT flag set from 281 to 283.1s
MAFV 2.9-4.2
RPM 2400 to 5100 (then wheelspin!)
KAMs = 1.000 for duration - no change at all
LAMBSE around 0.81 and FE% around 1.19 for the duration
HEGOs both = 0.85 consistently
LOAD is around 0.9 for most of the pull but heads up to 1.05 towards the end.
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Re: A9L2 Tune into 8LD EEC progress

Unread postby decipha » Fri May 10, 2019 7:12 am

by watching the lambse's switch with the hegos which from what you posted it didn't
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Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Fri May 10, 2019 1:59 pm

Of course, that makes sense.

So I did another WOT run without the changes to FN320A and THBP5 and the log is very much the same with KAMS = 1.000, LAMBSEs = 1.2 (EDIT: actually LAMBSEs = 0.8, FE% = 1.2) and HEGOs steady on 0.9.

Is there something else I need to do to force closed loop at WOT?
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Re: A9L2 Tune into 8LD EEC progress

Unread postby decipha » Fri May 10, 2019 8:31 pm

if lambses were 1.2 then you are excessively rich and its removing 20% fuel still in closed loop
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Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Sat May 11, 2019 3:52 am

Righto, thanks. Sorry, I think I misinterpreted your previous post.

So the philosophy I have adopted so far is that the injectors and data are known and I have been adjusting the MAF curve to get FE% as close to 1 as possible.

Do I just continue to make adjustments to the MAF curve for WOT accordingly? Until I get FE% within about 5% for all MAFV values that the engine can reach.

EDIT: Just re read my previous post and realised there was an error - the LAMBSEs were 0.8, the FE% was 1.2. So I am lean by 20% then?
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Vehicle Information: Cobra replica. 302 HO from Mustang. 8LD ECU with chip. Massflo (Pro-M) EFI. Trickflow heads and cam. QH Jaybird and F3v2 chip. TunerPro RT.

Re: A9L2 Tune into 8LD EEC progress

Unread postby decipha » Sat May 11, 2019 5:32 pm

if the lambses were stuvk at .8 then u were in open loop and u have to manually calculate the fuel error

if u were in closed loop and the lambses were jumping around .8 then yes you were 20% lean
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90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Sat May 11, 2019 11:05 pm

Thanks decipha.

The LAMBSEs were fairly constant - no jumping around at all. So it looks like I am still going into OL at WOT.

There are a couple of PIDs I found that appear to confirm this as well.

Do I need a wideband to calculate the error manually?
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Vehicle Information: Cobra replica. 302 HO from Mustang. 8LD ECU with chip. Massflo (Pro-M) EFI. Trickflow heads and cam. QH Jaybird and F3v2 chip. TunerPro RT.

Re: A9L2 Tune into 8LD EEC progress

Unread postby decipha » Mon May 13, 2019 6:02 am

if its in open loop then yes you'll need a wideband. set the wot threshold high as well
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Posts: 16782
Joined: Mon Jul 15, 2013 5:29 pm
Location: New Orleans, LA
Name: Michael Ponthieux
Vehicle Information: Supercoupin' x10
90 (4x 5spds) - Dante, Ruby, Daja, Ava
91 4r70w - Skarlett
92 (2x) 5spd & auto - Bianqa, Andrea
93 auto - Danika
94 5spd Rionda
95 auto Aisha
Vehicle 2 Information: Others:
00 Lincoln LS - Luanda
98 Camaro SS - Bounquisha
02 Harley F-150 - Sasasha
03 Marauder - DyShyKy
00 Explorer 5L - Bernyce
07 GMC 2500HD 6L - Veranafer

Re: A9L2 Tune into 8LD EEC progress

Unread postby gamh44 » Tue May 14, 2019 6:17 pm

THANK YOU!

Set the WOT Threshold to max and did a test. It now stays in CL during WOT.

Now on to dialling WOT in.

Stay tuned ....
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