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Re: running single O2 sensor on turbo mustang?

decipha wrote:no, the ecu just ignores the input when you disable it. The hego heater is fed 12v power from the ignition switch same as all the ignition feeds.


Gotcha.
by 89fast5oh
Fri Aug 24, 2018 3:54 pm
 
Forum: Foxbody Tuning
Topic: running single O2 sensor on turbo mustang?
Replies: 12
Views: 1169

Re: running single O2 sensor on turbo mustang?

If the hego2 is disabled but the sensor is left in place, will the it get fouled and ruined over time from the exhaust gases?
by 89fast5oh
Thu Aug 23, 2018 8:45 pm
 
Forum: Foxbody Tuning
Topic: running single O2 sensor on turbo mustang?
Replies: 12
Views: 1169

Re: Current tune suggestions

I have no idea what your asking but in open loop the fuel error cannot be calculated automatically since the hegos aren't controlling fuel. just put it in closed loop and let tunerpro tell you your fuel error. I don't understand why your over-complicating things and making it so difficult. I was tr...
by 89fast5oh
Mon Jun 18, 2018 10:45 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Re: Current tune suggestions

you can't use it if your forcing open loop Re-visiting this thread. I logged the fuel error in OL. If I change back to normal operation closed loop, can I apply the correction recorded in OL to the now closed loop operation to bring the fuel error back in line and target stoich AFR? Reason I ask is...
by 89fast5oh
Sun Jun 17, 2018 10:25 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Re: Current tune suggestions

decipha wrote:you can't use it if your forcing open loop


Re-visiting this thread. I logged the fuel error in OL. If I change back to normal operation closed loop, can I apply the correction recorded in OL to the now closed loop operation to bring the fuel error back in line and target stoich AFR?
by 89fast5oh
Sun Jun 17, 2018 10:20 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Re: Current tune suggestions

no, fuel error is fuel error doesn't matter what fuel your running just simply go command whatever fuel you want for whatever range you want it in no problem read the fuel write up it will all make perfect sense So I should use the Hist_MAF to calculate the new MAF Curve? I think I have read to tak...
by 89fast5oh
Mon Jun 04, 2018 9:47 am
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Re: Current tune suggestions

it is the maf but you don't go adjust it to get the afr you want, you adjust it to get the afr the ecu is commanding Isn't the fuel error calculation designed for 14.7:1 AFR? If I want a 13-13.5 at steady cruise and 12.5:1 at WOT in forced open loop, how do I command the ECU to do that? I understan...
by 89fast5oh
Wed May 30, 2018 5:24 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Re: Current tune suggestions

thats the problem, you don't adjust the maf to get it to read what you want you dialed the fuel in where its supposed to be the same way it could be a fuel issue if its reading lean? if fuel is inconsistent you have a fuel issue doesnt matter if its lean or rich And here lies the problem that I am ...
by 89fast5oh
Tue May 29, 2018 9:07 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Re: Current tune suggestions

decipha wrote:sounds like you have a fuel supply issue

did you dial in your fuel yet?


I have adjusted the MAF at idle and through the range to get the readings where I want them.

How could it be a supply issue if it is reading rich?
by 89fast5oh
Tue May 29, 2018 8:43 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Current tune suggestions

I've been playing around trying to get things working well but I am having trouble figuring out exactly what direction I should be moving in. I used the A9l2 and have made numerous adjustments. I am running in forced open loop because the car likes to cruise at 13-13.5 AFR. I am getting some cold st...
by 89fast5oh
Tue May 29, 2018 5:56 pm
 
Forum: Foxbody Tuning
Topic: Current tune suggestions
Replies: 15
Views: 877

Speedometer on dashboard

Is it possible to show vehicle speed on the dashboard?

Using the GUFX_180124.xdf and DECIPHA_EEC_IV_QH_20171109.adx
by 89fast5oh
Sun May 20, 2018 8:49 pm
 
Forum: TunerPro
Topic: Speedometer on dashboard
Replies: 1
Views: 150

Re: Adding/subtracting FUEL & Closed Loop operation

correct it has to be unplugged when you open the throttle stop otherwise the ecu will set the part throttle flag since closed throttle tps will be above ratch ratch is the lowest tps voltage since key on However, if the KEY IS OFF as i specified then you can open the throttle stop all day long and ...
by 89fast5oh
Sun May 13, 2018 11:59 am
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

no need to unplug the tps, open the set screw with the key off and check ipsibr again when its back up to temp if its idling too high wih ipsibpr near 0 then that means you arent looking at dsdrpm to see what idle speed your commanding Your instructions for non-decipha tunes or base idle reset on s...
by 89fast5oh
Sat May 12, 2018 2:30 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

I see a lot of reference to ipsibpr to be near 0 or 0.050 max. But what exactly is ipsibpr and why should it be near 0?
by 89fast5oh
Fri May 11, 2018 12:52 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

no once you get your fuel dialed in all will be better i have the check engine light set to flash in the a9l2 so you know you have a major problem it through the code for the TPS I hope the check engine light was just for the TPS, it started flashing 15 minutes after I had unplugged and plugged the...
by 89fast5oh
Fri May 11, 2018 8:14 am
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

in that case its most likely timing then, you can kick up the dashpot spark multiplier function to all 1.000 I'm now running forced open loop. I didn't need to change anything timing related. There is no longer any closed throttle/decel popping. I will need to make some MAF adjustments to get the l...
by 89fast5oh
Thu May 10, 2018 7:58 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

odd that it would cackle being off the scale lean. Are you sure it doesn't cackle right when you close the throttle then stops cackling when the wideband reads off the scale lean? if so thats due to decel fuel shut off turning the injectors off which is normal. Otherwise if its not dfso and lean ca...
by 89fast5oh
Wed May 09, 2018 7:35 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

I also experience heavy exhaust popping/crackling on closed throttle decel. During closed throttle decel the wideband displays (- - -) nothing because its off the scale lean. Is this a symptom of closed loop trying to control fuel? Will i be able to address this in open loop tuning? It's showing le...
by 89fast5oh
Wed May 09, 2018 7:32 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

make sure the o2 sensor enable switch is getting a good ground. Its the wire that has an o ring and clips to the back of the head. That wire is the hego ground reference. If its not getting a good solid ground the hegos will not turn on. no you can keep them, best to so you can see if you go lean a...
by 89fast5oh
Wed May 09, 2018 7:26 am
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Adding/subtracting FUEL & Closed Loop operation

yep simply go to the area in the fuel table where you want your commanded fuel and plug the value in there might be sure to force open loop by setting fn320a the open loop ect threshold to 0 perload I've been driving around the car making changes to the MAF curve, but the results are not good. Calc...
by 89fast5oh
Tue May 08, 2018 7:13 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: MAF Scaling, Load, & Sea Level Spark

Revisiting this thread. Does the fn035 need changing whenever the maf transfer is changed and vice versa? I did a wot pull and at say 5200 rpm it recorded a perload error of 1.397. If I multiply that by the .75 in the A9L2 it equals 1.04. Can there be a value greater than 100% for a NA engine? If I ...
by 89fast5oh
Sun May 06, 2018 10:21 pm
 
Forum: Foxbody Tuning
Topic: MAF Scaling, Load, & Sea Level Spark
Replies: 12
Views: 1045

Re: A9L2 Base Calibration

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 eng...
by 89fast5oh
Sun May 06, 2018 2:46 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

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 engi...
by 89fast5oh
Sat May 05, 2018 6:38 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

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.
by 89fast5oh
Fri May 04, 2018 11:05 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

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? ...
by 89fast5oh
Fri May 04, 2018 11:03 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

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...
by 89fast5oh
Fri May 04, 2018 7:32 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

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?
by 89fast5oh
Fri May 04, 2018 3:55 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

Here are the 2 tunes.
by 89fast5oh
Fri May 04, 2018 9:16 am
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: A9L2 Base Calibration

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 he...
by 89fast5oh
Thu May 03, 2018 5:26 pm
 
Forum: Foxbody Tuning
Topic: A9L2 Base Calibration
Replies: 93
Views: 41474

Re: Adding/subtracting FUEL & Closed Loop operation

Would it be possible to set the commanded AFR at 13.5 or so at cruise and idle and have it run at that?
by 89fast5oh
Tue May 01, 2018 4:03 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Adding/subtracting FUEL & Closed Loop operation

If you add or subtract fuel using the MAF transfer what happens when the computer goes into Closed Loop? For example, I know for a fact from using the WMS SDS speed density system that my engine like to cruise around nice and smooth on the richer side of things around 13.5:1. So with the EEC-IV A9L2...
by 89fast5oh
Mon Apr 30, 2018 8:01 pm
 
Forum: Foxbody Tuning
Topic: Adding/subtracting FUEL & Closed Loop operation
Replies: 24
Views: 1034

Re: Major surging on first A9L2 start

I think I figured it out. I took the A9L2 bin and re-entered my 7 combo specific variables. Fired it up and things were much better. It actually idled. The AFR was reading around 15:1. Maybe I corrupted the MAF Transfer the first time or something. Then without knowing what I was doing, I was INCREA...
by 89fast5oh
Sun Apr 29, 2018 1:53 pm
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surging on first A9L2 start

no yep Should I also set my wideband to read out in lambda? I have it in AFR because in my mind I can quickly recall what the range means. If it is pegging the wideband in full rich at idle and 1500 rpm cruise, any idea how much % to adjust the MAF transfer as a start? I assume to take out a % over...
by 89fast5oh
Sat Apr 28, 2018 11:11 pm
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surging on first A9L2 start

Will I even be able to set the base idle if the fuel is so far off on the rich end? I will be honest. I thought I had a grasp on what it would take to tune this myself, but I am not sure. I think I have read so many things, I am going in circles. To dial in fuel, do I start with the MAF transfer kg/...
by 89fast5oh
Sat Apr 28, 2018 9:51 pm
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surging on first A9L2 start

all eec's are hard programmed for 10 dbtdc, anything other than that will screw up every calculation in the ecu with a stock tune the only way to add timing is to go twist the distributor but when custom tuning its critical the distributor be set correctly to the ford spec Ok I will set it to 10* B...
by 89fast5oh
Sat Apr 28, 2018 8:53 am
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surging on first A9L2 start

I was reading through the how to's and the timing and fueling pages. You have a emphasis on 10 degrees BTDC. I had always set the advance as far as 16 degrees BTDC on previous engines. When I timed the engine yesterday I set it to 16* BTDC. Is the 10* BTDC only for tunes you provide, or does it need...
by 89fast5oh
Sat Apr 28, 2018 7:32 am
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surging on first A9L2 start

So I don't think it is my throttle stop screw. I loaded your stock A9L2 with no modifications and it started and idled smooth at 800 RPM. AFR is so lean it doesn't register on the gauge. A light cruise around shows extremely lean conditions. When I load the A9L2 with 7 basic changes that need to be ...
by 89fast5oh
Fri Apr 27, 2018 10:24 pm
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surging on first A9L2 start

I'm thinking it might be something in my A9L2 tune. I adjusted all the items recommend on the start page. I tried the A9L2 as supplied by decipha and it idled better without the surging.
by 89fast5oh
Fri Apr 27, 2018 2:57 pm
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Major surgery on first A9L2 start

decipha wrote:no the o2 voltage is absolutely useless its a narrowband not a wideband

you most likely need to open the throttle stop


This was all at idle, I haven't driven it yet. I assumed since it showed such a low voltage it was dumping fuel to try and richen it up.
by 89fast5oh
Fri Apr 27, 2018 2:53 pm
 
Forum: Foxbody Tuning
Topic: Major surging on first A9L2 start
Replies: 14
Views: 598

Re: Try the Quarterhorse or stick with WMS SDS

decipha wrote:why would you swap from the mass air ecu to an older speed density setup?


I swapped because at the time I didn't know about the moates quarterhorse and there was no one within a few hundred miles that would even look at it.
by 89fast5oh
Fri Apr 27, 2018 2:12 pm
 
Forum: Foxbody Tuning
Topic: Try the Quarterhorse or stick with WMS SDS
Replies: 5
Views: 302
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