A9L2 Base Calibration

Vehicle specific forum for tuning the Foxbody Chassis Mustangs utilizing decipha's GUFX Strategy

Re: A9L2 Base Calibration

Unread postby decipha » Thu Apr 19, 2018 4:38 pm

yes you should unless you don't mind the fuel odor

in the a9l2 if its present it'll use it if its not it wont turn the check engine light on
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Re: A9L2 Base Calibration

Unread postby 89fast5oh » Thu May 03, 2018 5:26 pm

I've tried the A9L2 twice now entering my specifics from scratch with no luck, it just doesn't want to run well or idle.

I entered all my specifics into the stock A9L and made changes to many items to match the A9L2. It starts and idles like a stock 5.0L. Just for fun I set the idle to 600 RPM, a healthy 408W sounds mean idling that low. I now have it set at 750 RPM.

It drives and pulls well up to 4000 rpm when I can feel a slight hesitation, it keeps pulling to redline after that

Can the stock A9L be easily modified to only use the A9L2 FN200 spark table?

How would I accomplish this?
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Vehicle Information: 1989 LX. 408W 10.7:1, FTI hyd roller .622"/.608" int/exh, AFR 185s, Edelbrock Victor EFI 5.8, 47lb injectors, 75mm MAF & throttle body, 1 3/4" long tubes, 2.5" full exhaust, TKO600, 4.10s.

Re: A9L2 Base Calibration

Unread postby decipha » Thu May 03, 2018 6:31 pm

what your describing doesnt make any sense

post the a9l tune you run with no probs and your a9l2 tune so we can see you must be doing something wrong
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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 Base Calibration

Unread postby 89fast5oh » Fri May 04, 2018 9:16 am

Here are the 2 tunes.
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Re: A9L2 Base Calibration

Unread postby decipha » Fri May 04, 2018 2:57 pm

you have the global fuel multiplier scalar STOICH_AFR set to 13 in your a9l tune
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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 Base Calibration

Unread postby 89fast5oh » Fri May 04, 2018 3:55 pm

decipha wrote:you have the global fuel multiplier scalar STOICH_AFR set to 13 in your a9l tune


I was experimenting with 13:1 AFR to see if it would be a easy way to richen it up in closed loop.

Did you see anything in the A9L2 as to why it won't idle or drive well?
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Re: A9L2 Base Calibration

Unread postby decipha » Fri May 04, 2018 6:06 pm

no they are the same shud run the same
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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 Base Calibration

Unread postby 89fast5oh » Fri May 04, 2018 7:32 pm

decipha wrote:no they are the same shud run the same


I'm going to give the A9L2 another try tomorrow.

Just to clear up a few things.

For peak load scaling FN035, I did a 2nd gear pull and logged the LOAD.

At 5200 RPM load indicated 1.01

So I just input that 1.01 number into the FN035 table at 5200 RPM?

What ever # the load logged gets inputted into the corresponding RPM slot? I have read talk about the histogram but do not understand what needs to be done with that.
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Re: A9L2 Base Calibration

Unread postby decipha » Fri May 04, 2018 10:45 pm

yep u can do that

also, if you look at perload at that given rpm it will tell u the correction percentage since it should be 1.000, if you multiply the current load value in fn035 by the logged perload value it will give u the same LOAD value you are supposed to plug in there

does that make sense?

the histogram logs perload at wot so u can see perload and use it as the correction percentage since its the same thing
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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 Base Calibration

Unread postby 89fast5oh » Fri May 04, 2018 11:03 pm

decipha wrote:yep u can do that

also, if you look at perload at that given rpm it will tell u the correction percentage since it should be 1.000, if you multiply the current load value in fn035 by the logged perload value it will give u the same LOAD value you are supposed to plug in there

does that make sense?

the histogram logs perload at wot so u can see perload and use it as the correction percentage since its the same thing


Yes that does make sense.

Now in regards to MAF, I am thinking it is the same procedure? I think I have seen you reference using Hist_FuelErr or is is Hist_MAF?

Take that logged value and multiply the current MAF kg?hr values?
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Re: A9L2 Base Calibration

Unread postby 89fast5oh » Fri May 04, 2018 11:05 pm

I have also just wired in my AEM wideband to pin 27 so tunerpro rt logs the reading.

So that should make it easier to dial in the fuel now.
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Vehicle Information: 1989 LX. 408W 10.7:1, FTI hyd roller .622"/.608" int/exh, AFR 185s, Edelbrock Victor EFI 5.8, 47lb injectors, 75mm MAF & throttle body, 1 3/4" long tubes, 2.5" full exhaust, TKO600, 4.10s.

Re: A9L2 Base Calibration

Unread postby decipha » Sat May 05, 2018 1:47 am

Hist_MAF is the histogram for the MAF

Hist_FuelErr is the histogram for the fuel error, EXACT SAME AS Hist_MAF except that its got more than 1 column so you can see the fuel error at different maf cts for different RPMs.
Hist_FuelErr is to visually see how well your injectors are dialed in and if when/where it needs correction to the injectors to help dial them in.
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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 Base Calibration

Unread postby 89fast5oh » Sat May 05, 2018 6:38 pm

Today was a step in the right direction.

I entered the MAF and Perload corrections in.

The A9L2 started up and idled well. I took it for a drive and it seemed to run well.

Unfortunately there was a complete dead spot when giving it anything more than like 10% throttle. It almost seemed like the engine was shutting off for a fraction of a second.

Again nothing was changed on the engine itself from yesterday when it was running amazing on the modded A9L.

I have a log of when I was making it happen so it would be recorded.

Mind having a look?

Should I start a new thread so not to junk up this one?
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Vehicle Information: 1989 LX. 408W 10.7:1, FTI hyd roller .622"/.608" int/exh, AFR 185s, Edelbrock Victor EFI 5.8, 47lb injectors, 75mm MAF & throttle body, 1 3/4" long tubes, 2.5" full exhaust, TKO600, 4.10s.

Re: A9L2 Base Calibration

Unread postby 89fast5oh » Sun May 06, 2018 2:46 pm

89fast5oh wrote:Today was a step in the right direction.

I entered the MAF and Perload corrections in.

The A9L2 started up and idled well. I took it for a drive and it seemed to run well.

Unfortunately there was a complete dead spot when giving it anything more than like 10% throttle. It almost seemed like the engine was shutting off for a fraction of a second.

Again nothing was changed on the engine itself from yesterday when it was running amazing on the modded A9L.

I have a log of when I was making it happen so it would be recorded.

Mind having a look?

Should I start a new thread so not to junk up this one?


I figured this one out. Had 1 bad MAF kg/hr point.

Runs much better now.
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Vehicle Information: 1989 LX. 408W 10.7:1, FTI hyd roller .622"/.608" int/exh, AFR 185s, Edelbrock Victor EFI 5.8, 47lb injectors, 75mm MAF & throttle body, 1 3/4" long tubes, 2.5" full exhaust, TKO600, 4.10s.

Re: A9L2 Base Calibration

Unread postby Monster Miata » Wed Oct 16, 2019 10:07 am

I'm wanting to use the A9L2 code for my Monster Miata.
I have a newly built 331 installed and have some questions about the parameters I need to enter in the base calibration.
I am using a '93 cobra MAF, (see pic) that I bored out. I used a Superflow 1020 flow bench to create a couple of new transfer curves.
One curve was created with no orifice in the calibration tube and the other with an orifice.
I took readings every .05vdc. The non-orifice curve maxed out at 1471.517 Kg/hr @ 5.30vdc, and the orifice curved maxed out at 1471.517 Kg/hr @ 3.4vdc.
My question is, will the EEC's A\D converter read up to 5.3vdc with Deciphas' A9L2 code?
Next question is, has anyone used a custom injector offset table before? I created a custom offset table using the fuel system on the car and it's different from the tables I've seen out there.

Thanks,
Christopher
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Vehicle Information: 1990 Miata
EEC-IV A9L
Tweecer RT
331 12/1 Comp.
Jack Roush Upper & Lower Intake (Prototype)
Ford motorsport J302 Heads
Bullet .555Inl/.550Ex @ 223/229 Dur @ .050
111.5 Lobe Sep 108 Lobe Center
30Lb injectors
Bored 93' Cobra MAF
Wordclass T-5
Custom 4-2-1 Headers

Re: A9L2 Base Calibration

Unread postby decipha » Wed Oct 16, 2019 12:10 pm

no, 5.3 volts is above the hardware

part of dialing in injectors is adjusting the offset so not uncommon at all
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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 Base Calibration

Unread postby Monster Miata » Wed Oct 16, 2019 12:25 pm

The response is greatly appreciated.

Seeing that I will use the lower voltage curve, what resolution would you recommend me using for the MAF transfer?

For Knowledge, why does the MAF transfer go to 16 volts?

Thanks,
Christopher
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Name: Christopher
Vehicle Information: 1990 Miata
EEC-IV A9L
Tweecer RT
331 12/1 Comp.
Jack Roush Upper & Lower Intake (Prototype)
Ford motorsport J302 Heads
Bullet .555Inl/.550Ex @ 223/229 Dur @ .050
111.5 Lobe Sep 108 Lobe Center
30Lb injectors
Bored 93' Cobra MAF
Wordclass T-5
Custom 4-2-1 Headers

Re: A9L2 Base Calibration

Unread postby decipha » Wed Oct 16, 2019 4:15 pm

the resolution outlined in the a9l2 maf transfer. Just plug in your flow for those counts so the histogram stays correct and its easier for you to dial in.

on the earlier ecu's the maf ad count conversion is what causes the maf voltage to extend all the way up to 16v. Its only done as a failsafe if the maf errors out it loads a word as a double byte FF which sets the word to FFFF. Since the equation is /4096 it gives you 16v max (65535/4096).

On the newer ecu's the equation is pure ad counts x/64 which gives you a max value of (65535/64==1023.98) / 200 == 5.12 volts.

A few years ago I wrote a little patch for gufx to set the max maf to 5.12v in the maf transfer and not cause any corruption. I never tested it though but the patch is in gufx xdf file.
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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 Base Calibration

Unread postby Monster Miata » Thu Oct 17, 2019 9:45 pm

I shall.

I'll look for it.

I downloaded your A9L2 bin and have spent the past few hours reading.
I would like to make sure I have changed all the correct parameters to make some heat.

I updated the following setting, AHISL, ALOSL FN389, FN367, FN348, Z-AFR I'm using real gas!, VSTYPE, BPSSW, TR Load, and FN036.

I could not find my cylinder heads in your MBT list. I have the FRP-J302 (Alan Root) style heads. Any idea what I should use for the MBT?

Do I need to set CINTSW? I have no neutral switch.

Does FN306 need to be scaled for the larger injectors?

Where does DWLTBP get it's temp reading from?

Thanks,
Christopher
Monster Miata
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Posts: 3
Joined: Fri Oct 11, 2019 1:36 pm
Name: Christopher
Vehicle Information: 1990 Miata
EEC-IV A9L
Tweecer RT
331 12/1 Comp.
Jack Roush Upper & Lower Intake (Prototype)
Ford motorsport J302 Heads
Bullet .555Inl/.550Ex @ 223/229 Dur @ .050
111.5 Lobe Sep 108 Lobe Center
30Lb injectors
Bored 93' Cobra MAF
Wordclass T-5
Custom 4-2-1 Headers

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