Search found 76 matches

by Pontisteve
Fri Jul 20, 2018 6:36 am
Forum: Hardware Discussions
Topic: EEC-IV pin sourcing
Replies: 10
Views: 7463

Re: EEC-IV pin sourcing

I'm trying to source these EEC-IV PCM female terminals too. Yota1280, did you ever find the correct terminals? Got a part#?
by Pontisteve
Wed Feb 01, 2017 7:49 pm
Forum: Hardware Discussions
Topic: A9L Fan control
Replies: 77
Views: 66140

Re: A9L Fan control

Does anybody have a datasheet for the 71001FB fan chip? I'm curious to know exactly how much current the chip is rated at. Also, for those of you who mentioned 1 amp max current, where did you come up with that number? And is the chip current limited for protection, or will you fry it if you try to ...
by Pontisteve
Thu Nov 10, 2016 5:14 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

Right, I am assuming a interpolation of FN904A and FN905A depending on barometric pressure/altitude. However, there was something making me question if the interpolation was only with FN904A while FN901 was being used. But I couldn't spot any real evidence that 904A and 905A weren't always being int...
by Pontisteve
Tue Nov 08, 2016 5:21 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

Alright, the lug time fraction explains it then. So it works like this: Lug timer fraction: 0 seconds = 0/4 = 0 1 seconds = 1/4 = .25 2 seconds = 2/4 = .5 3 seconds = 3/4 = .75 4 seconds = 4/4 = 1 The exact formula is ((FN904A - FN901) * (LUGTMR/LUGTIM)) + FN901. Based on the example of an A9L at 30...
by Pontisteve
Tue Nov 08, 2016 4:16 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

The real questions here are what exactly is the formula for determining lug time fraction? What is Derek's "Base spark"? And what is Derek's Temp Load Spark? Ironically, the name chosen for FN901 happens to be Base Spark or Base Sea Level Spark, but I'm sure Derek was referring to base spark as FN90...
by Pontisteve
Tue Nov 08, 2016 4:08 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

Right, using the stock A9L values, LUGTIM = 4 seconds. At 30% load and 1100 RPM, FN901 = 29 degrees and FN904 = 37 degrees. When Load > FN125, LUGTMR starts counting upwards until it hits LUGTIM (4 seconds). However, load is so LOW in FN125, that you will basically hit that every time you touch the ...
by Pontisteve
Mon Nov 07, 2016 4:24 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

Derek, I did the long math on this tonite, using A9L, 30% load, 1100 RPM as an example, where FN904A = 37 degrees and FN901 = 29 degrees. If your "base spark" is FN904A and your "temp load spark" is FN901, then we have a problem. The Lug Time fraction basically goes from 1 to 0 over 4 seconds of tim...
by Pontisteve
Sun Nov 06, 2016 5:01 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

Looking more closely at FN125, I believe it's only purpose of existance is to prevent the spark from being altered at idle. There's a 35% load threshold at 0 RPM that has to be met before allowing "lugging mode". At 750 RPM, that's about 20%. Just above idle at 1100 it drops to 13%, and at 1600 it d...
by Pontisteve
Sun Nov 06, 2016 4:50 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

The way you describe it working makes the most sense, Derek. [(FN904A/FN905A - FN901) * (1 - LUGTMR/LUGTIM)] + FN901 Basically, FN901 is used and slowly rolls towards FN904A/905A of a period of LUGTIM. Whoever wrote the GUFB document was dazed and confused. They describe FN901 as being a more aggres...
by Pontisteve
Wed Nov 02, 2016 5:12 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

Is FN901 base spark, or temp load spark?
by Pontisteve
Tue Nov 01, 2016 3:01 am
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Re: Understanding FN901 LOM Spark and FN125

That is correct, Chris. Also, setting FN125 to 0 has a similar effect on the fuel side of Lugging Mode. The GUF document just does a crap job of explaining this one. My best guess is that the spark ramps from 0 to about 28 degrees (or whatevers in the FN901 table) over the 4 second period. But witho...
by Pontisteve
Fri Oct 28, 2016 10:59 am
Forum: Tuning the EEC....
Topic: LOM Spark (cgrey)
Replies: 36
Views: 10443

Re: LOM Spark (cgrey)

Let's see if it does with FN125 set to function again. I'm thinking as soon as you leave the light, the spark will ramp from 0 to whatever value you have in FN901 over [LUGTIM] seconds, and then switch to FN904. If you increase LUGTIM, it should be even more evident as it ramps slower.
by Pontisteve
Fri Oct 28, 2016 12:15 am
Forum: Tuning the EEC....
Topic: LOM Spark (cgrey)
Replies: 36
Views: 10443

Re: LOM Spark (cgrey)

If anybody out there has deleted FN901, and would like to test something for me, here's a method. Copy your FN904 table over to FN901, and change LUGTIM to something really long, like 8 seconds. Then accelerate from a standstill at around 1/2 throttle or so, and log timing. I'm guessing it will star...
by Pontisteve
Fri Oct 28, 2016 12:10 am
Forum: Tuning the EEC....
Topic: LOM Spark (cgrey)
Replies: 36
Views: 10443

Re: LOM Spark (cgrey)

One of these days, I'll finish building my EEC-IV bench tester, and it'll make it easier to confirm this stuff. I feel pretty confident that the table gets used for those (adjustable) 4 seconds, and then it rolls over to the normal spark tables 904/905. But the behavior it exhibits during those 4 se...
by Pontisteve
Thu Oct 27, 2016 3:28 am
Forum: Tuning the EEC....
Topic: LOM Spark (cgrey)
Replies: 36
Views: 10443

Re: LOM Spark (cgrey)

Sorry to dig up ancient history, but this thread is exactly what I'm chasing. I have a couple things I would like to discuss. First, I'm just guessing that LOM might stand for Lugging Open-Loop Mode, giving reference to the fact that it defines lugging conditions that require modifications to both s...
by Pontisteve
Wed Oct 26, 2016 4:56 pm
Forum: EECGeeks
Topic: Understanding FN901 LOM Spark and FN125
Replies: 18
Views: 11017

Understanding FN901 LOM Spark and FN125

Well after pouring over the GUFB strategy book for a few hours last night, I'm putting out a request for help on FN901 and it's entry access table, FN125. GUFx uses FN904A "LOMSEA" sealevel spark and FN905A "LOMALT" altitude spark normally for part throttle spark, and interpolates between the two ba...
by Pontisteve
Tue Oct 04, 2016 7:27 pm
Forum: Hardware Discussions
Topic: A9L Fan control
Replies: 77
Views: 66140

Re: A9L Fan control

by Pontisteve
Mon Oct 03, 2016 11:47 pm
Forum: EECGeeks
Topic: A/D counts vs voltage conversion
Replies: 56
Views: 36702

Re: A/D counts vs voltage conversion

I would very much like to know exactly what 5v regulators came in both EEC4 and 5.
by Pontisteve
Mon Oct 03, 2016 8:01 pm
Forum: EECGeeks
Topic: A/D counts vs voltage conversion
Replies: 56
Views: 36702

Re: A/D counts vs voltage conversion

jsa, why would the MAF go to other electronics, and not just go into the ADC like everything else? What's the point? There must be a point. And what other electronics are there, that would accept a MAF signal (and a unique MAF signal return)? There is signal conditioning to the MAF, but that's done ...
by Pontisteve
Mon Oct 03, 2016 4:35 pm
Forum: EECGeeks
Topic: A/D counts vs voltage conversion
Replies: 56
Views: 36702

Re: A/D counts vs voltage conversion

So the MAF signal doesn't go to the ad converter? And what do you mean it ties into the eec 5v? I don't understand what you're trying to tell me.
by Pontisteve
Mon Oct 03, 2016 3:13 pm
Forum: EECGeeks
Topic: A/D counts vs voltage conversion
Replies: 56
Views: 36702

Re: A/D counts vs voltage conversion

I'm not sure I completely understand you. Since the MAF has it's own 12v power source and an output that can actually exceed 5 or 6 volts, the only other wires are Signal Return and Signal. The MAF provides it's own signal return (sensor ground), and then shares it to the PCM. I'm not sure exactly h...
by Pontisteve
Mon Oct 03, 2016 3:55 am
Forum: EECGeeks
Topic: A/D counts vs voltage conversion
Replies: 56
Views: 36702

Re: A/D counts vs voltage conversion

Gentlemen, I need your thoughts once again on this subject. While I've come to believe that Reference Voltage (VREF) is 5.12 volts, I would like to know exactly what voltage regulator came in EEC-IV and EEC-V processors. I want to dig deep on the manufacturers specs on that one, just to see. But I b...
by Pontisteve
Sat Oct 01, 2016 3:25 am
Forum: Hardware Discussions
Topic: A9L Fan control
Replies: 77
Views: 66140

Re: A9L Fan control

I would love to see a picture of what you did. Are you saying you used a modern version of the original 71001FB chip, and soldered it onto the board in the original location? Or did something remote?

Was it just as easy as soldering on the 2nd chip, or were there other things that you had to add?
by Pontisteve
Fri May 06, 2016 1:42 pm
Forum: Tuning the EEC....
Topic: FN1360 for GUFx strategies
Replies: 50
Views: 22241

Re: FN1360 for GUFx strategies

I hand checked the a9l.bin last nite, and it does not have the patch code in it already.

What all crazy hacks, Mike?
by Pontisteve
Fri May 06, 2016 3:16 am
Forum: Tuning the EEC....
Topic: FN1360 for GUFx strategies
Replies: 50
Views: 22241

Re: FN1360 for GUFx strategies

I knew it was in the GUF definitions, but the warnings say not to turn FN1360 on unless the .bin file has had the patch code installed. Reading this thread, it made me believe that they weren't wanting to put it in the bins unless you wanted it in there. Also, I'm pretty sure I've compared bins befo...
by Pontisteve
Thu May 05, 2016 1:51 am
Forum: Tuning the EEC....
Topic: FN1360 for GUFx strategies
Replies: 50
Views: 22241

Re: FN1360 for GUFx strategies

This thread references older versions of BE that had a Binary Explorer option that I no longer see in the newer BE2012. What is the current method for loading the FN1360 patch into a .bin file? And if you want to manually copy the patch over to the .bin, how do you open the patchcode.bin type files,...
by Pontisteve
Fri Mar 18, 2016 2:16 am
Forum: Tuning the EEC....
Topic: Why are there limits on NIOLD?
Replies: 3
Views: 1920

Why are there limits on NIOLD?

Looking in GUF1 at parameters NIOLD (Neutral Idle Open Loop Delay) and NIHYS (hysteresis), the description in the def warns "Do NOT set to a value of 0". I'm trying to figure out why have this warning. Setting it to 0 would seemingly force open loop every time you entered closed throttle. That could...
by Pontisteve
Thu Feb 18, 2016 3:47 am
Forum: EECGeeks
Topic: Question about added parameters
Replies: 2
Views: 2986

Re: Question about added parameters

MIchael, could you link me to the disassembly writeup please?

I tried using Tunercats disassembly tool, but was underwhelmed... or underskilled. Not sure which yet. LOL
by Pontisteve
Wed Feb 17, 2016 4:26 pm
Forum: EECGeeks
Topic: Question about added parameters
Replies: 2
Views: 2986

Question about added parameters

I have questions about how parameters are added. Let's pick on in particular as an example. There is a parameter CANPHP (Canister Purge Hardware Present) that does not appear to be in the GUFx strategy. A parameter has been added called Z_VPRG, that is described as a canister purge test enable/disab...
by Pontisteve
Fri Feb 12, 2016 7:40 am
Forum: Tuning the EEC....
Topic: FN810 ISC Adder vs RPM for GUF1
Replies: 7
Views: 2794

Re: FN810 ISC Adder vs RPM for GUF1

Yeah, no arguments here. I'm sure they are wrong. I noticed that changing it in GUF1 screwed up the bottom of the ISC transfer function. I just thought they had the addressing wrong. SCT has been wrong about a lot of things in GUFx. Thanks for pointing out that it was RPM and not RPM error in A9L. T...