ECMlink Another new to SD help thread. 2g

[97eclipsespyder]

Good morning all,

I have a 95 TSI AWD that I need some help or guidance on what I am doing wrong or need to fix. I have my vehicle profile up to date with every mod I can think of.

I am kinda at a loss as to if my tuning is off or if there is a fuel system issue.

I just made the switch to speed density and at the same time installed some low z fic 1650s. I'm running into issues with it going lean no matter how I set up the VE table, adjust global, and rest fuel trims.

I initially set up the global fuel with the calculator in link and it started fine but was lean every where. SD adjust via combined ft wanted to add fuel all over the place up to the max of 125 in the cells where there is boost pressure. Then I read that I should set up my idle cells to match .25 afpr. And adjust global and dead time to that. So I did that, it was sitting around -37 global and around 500 dead time, and it helped but it had rich spots an lean spots here and there through out the rpm range and still went lean above 10psi. And by lean I mean 17+ afr.

So I went off STFT wanting to add 15% as the boost increased so I raised global even more to around -20% with a dead time of around 400 or so. Now cruising is better but it's dropping the VE cells down significantly in that area and still goes lean when it builds higher psi. And it rich misfires 10.2 afr between 3500 and arround 5000 rpm at about 6 psi. It will get past that build more pressure and go lean.

I have attached the most recent log for reference. I'm sorry it's a long one I'm posting from my work computer at the moment and don't have link on it to crop it.

Does this seem like a tuning issue or a mechanical issue like a fuel pump that can't keep up now or a bad fuel pump o-ring?

I was previously running pte 1000cc injectors on the stock MAF before with no issues fwiw. I feel it probably is my tune but any advice is appreciated. If you need me to log anything different or send shorter logs just let me know. What you need from me.

1). Any boost, vac, or exhaust leaks?
No

Boost leak tested 5psi above your max boost with no leaks?

Yes- tested at 28 psi only minor leak through cold turbo shaft seal

2). Verified mechanical timing?
Yes

3). Verified base timing?
Yes +5* BTDC

4). Ignition system
COP or Stock Coil: Coil on plug, also swapped stock coils back in to verify not a coil issue
Wire brand and Age: Magnacore 2-3 yrs old when on stock coil
Spark Plug brand, type and Gap: NGK-BR7ES/.023 just put new plugs in 2 weeks ago

5). Motor health (Compression Test)
Cylinder 1: 130
Cylinder 2: 139
Cylinder 3: 132
Cylinder 4: 140

Elevation is 5800' above sea level so about right if adjusted by 15% for sea level

6). Performed basic throttle body adjustments?
Throttle Cable: Yes
TPS: Yes .63v
BISS: Yes, is with fans and everything off ISC hovers around 30-32

7). Compression ratio
8.5:1-stock 2g 7bolt

8). Any known bad sensors or brittle wiring?
No

9). Any DTC/CEL codes?
No

10). Electrical system
Car off (not running): 11.9-12.4 volts
Car running: 13.7-14.1 volts

11). Base fuel pressure and injector values
Base Fuel Pressure: 42.5
Injector Size (cc/min): 1650

12). Properly calibrated and configured wideband sensor
Sensor Brand: LC1
Calibration Date: March 28th 2022

13). Type of fuel
Pump E85

14). Watched ECMlink how-to videos?
Yes in the past but checked again and the links are dead.

And there are no exhaust leaks where it matters. Just a minor leak at the rear cat flange.

 

[AWD-Tony]

Global can’t be right and scrap that ve table. I run 1600’s also and on pump, global is -72 and e85 is -58 so it should be around those numbers. What fuel filter do you have and how long have you been on e? New or used injectors? Resistor pack deleted?

 

[97eclipsespyder]

When I initially set it up I was at -59 and it was adding a lot of fuel in the ve table. I'm running a fuel lab 818 filter with the stainless element. I have ran e85 for about a year now. But that was on my 1000cc pte injectors. The1650s were used but had them cleaned locally. I lost the print out but they were all between 1620 and 1640cc.

These are low impedance 1650s so I still have the resistor pack installed in the car.

I forgot to mention that I also tested the regulator by powering the pump and applying 25 psi and it raised to just under 70psi on the fuel gauge.

Would it be best to set it back up to the calculator and adjust the ve table to get the airflow per rev around .25 an adjust dead time to get stft right then take another log for you to look at?

 

[AWD-Tony]

Yes. I'd set the global to -55, reset the ve and take for a short cruise. I also see the injector battery offset looks like they're for stock injectors. I'd get those values and plug them in.

 

[97eclipsespyder]

Ok I will make the changes tonight and post another log. Thank you for the help sir

 

[jed344]

Global has to be off looking at your VE table. For the idle air flow per rev depending on cams and idle rpm that number can change. .25-.35 for reference GSC s3 at 1100rpm seem to like being around .30-.32 from my experience. Normally VE at idle to get air flow per rev inline will be mid 40's to mid 50's give or take. Cruising usually 60-80. Wide open you want to hit 100ve. If you hit way over your injectors are set to small, if way under they are set to large. Set the global so at wide open you hit 100ve that seems to give best results and makes the lb/min accurate VS expected dyno results on cars i tune.

 

[AWD-Tony]

Global has to be off looking at your VE table. For the idle air flow per rev depending on cams and idle rpm that number can change. .25-.35 for reference GSC s3 at 1100rpm seem to like being around .30-.32 from my experience. Normally VE at idle to get air flow per rev inline will be mid 40's to mid 50's give or take. Cruising usually 60-80. Wide open you want to hit 100ve. If you hit way over your injectors are set to small, if way under they are set to large. Set the global so at wide open you hit 100ve that seems to give best results and makes the lb/min accurate VS expected dyno results on cars i tune.

I agree. Get the idle and cruise so it drives decent. Then get correct global, set it and forget it. Fine tune idle and cruise afterwards. @jed344 I have a feeling there's something else wrong since it was still lean with -20 global. We shall see when op posts another log.

@97eclipsespyder You're using the stock front O2 so you can change "Wideband" to undefined

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[97eclipsespyder]

Sorry guys I had some family stuff pop up last night and wasn't able to get away and mess with the car. But I was thinking an did a quick search about load scaling. And found a thread on the link forums stating that load scale should be between 100-114% for a 2.0. I also saw that when you do a firmware update it will automatically adjust that scale to keep your settings the same. An if I remember correctly (back at work away from my laptop with link on it) my load scale was in the 80% range do you think this could be part of the problem? I did do a firm ware update about 2 months ago before I switched to SD. Or is this kinda irrelevant at the moment?

 

[AWD-Tony]

Sorry guys I had some family stuff pop up last night and wasn't able to get away and mess with the car. But I was thinking an did a quick search about load scaling. And found a thread on the link forums stating that load scale should be between 100-114% for a 2.0. I also saw that when you do a firmware update it will automatically adjust that scale to keep your settings the same. An if I remember correctly (back at work away from my laptop with link on it) my load scale was in the 80% range do you think this could be part of the problem? I did do a firm ware update about 2 months ago before I switched to SD. Or is this kinda irrelevant at the moment?

Yours is set to 100 so it's correct for 2.0

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You should change your elevation

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[97eclipsespyder]

Ok thanks for verifying that guess that will teach me not to "remember" my settings off hand haha. I'll make that change as well, I could have sworn I had the elevation set right as well. I may have only changed it in the map sensor preferences, but I will get that changed as well.

Thanks again for all the help guys I really do appreciate it. I will chime in tonight when I get the changes made and a quick log to post.

Also as for the injector battery offset. I don't have the sheet that came with these injectors for that info. I did find a few data sheets for FICs 1200,1800 low z, and a sheet for a set of high z injectors.

Should I use any of those for the scaling or just add to it a little at a time till the car doesn't stall when I kick my fans on?

 

[AWD-Tony]

Ok thanks for verifying that guess that will teach me not to "remember" my settings off hand haha. I'll make that change as well, I could have sworn I had the elevation set right as well. I may have only changed it in the map sensor preferences, but I will get that changed as well.

Thanks again for all the help guys I really do appreciate it. I will chime in tonight when I get the changes made and a quick log to post.

Also as for the injector battery offset. I don't have the sheet that came with these injectors for that info. I did find a few data sheets for FICs 1200,1800 low z, and a sheet for a set of high z injectors.

Should I use any of those for the scaling or just add to it a little at a time till the car doesn't stall when I kick my fans on?

I would contact fic to get the offset. I suspect it’s stalling when fan turns on because of the ve table.

 

[jed344]

Even without a sheet you will be able to figure out injector settings. Hit 100VE that’s global, then use SD table to set air flow per rev, then use dead time or inj bat adjust to get fuel trims correct. A data sheet does make it easier but it’s doable without.

 

[AWD-Tony]

The benefit of having the correct offset is if the alternator ever drops its output, the car would still run good.

 

[97eclipsespyder]

Here are a couple of different logs I took this morning. Idle log is idling without fans on and only adjustment is dead time and idle cells in ve table.

 

[AWD-Tony]

It looks much better than before and doesn't go lean under part throttle. How does it drive? I'm guessing it wants to stall when fan kicks on?

 

[97eclipsespyder]

Yeah it wants to stall at stop lights with the fan on and it still goes lean when it switches to open loop in higher psi levels. How do I work the open lean out should I lock it in open loop and look at the ve table or is there a better way? Or just let it switch on it's own and just play with the ve table in those areas? Anything specifically that I should focus on next? More cruising and ve tuning?

 

[AWD-Tony]

If it drives decent, I would tune wot. For it going lean when it switches over, track the ve table to see where it goes lean and up those values.

When you tune wot, it doesn’t have to be to redline. Just do little at a time. You want ve between 5-6k at 100 and hitting your target afr. So set your target afr in maxoct table and set your 5-6k ve to 100.

 

[97eclipsespyder]

If it drives decent, I would tune wot. For it going lean when it switches over, track the ve table to see where it goes lean and up those values.

When you tune wot, it doesn’t have to be to redline. Just do little at a time. You want ve between 5-6k at 100 and hitting your target afr. So set your target afr in maxoct table and set your 5-6k ve to 100.

Thanks for the help! I have a couple more questions.

How should I set the max oct. Table in da. Just set it to what I want in the cells where I'm wot, or should I interpolate from cruise to the wot cells. Since posted the previous datalogs. The car is surging lean at idle with my lights and fan on. Is it safe to assume this has to do with the battery latency? I'm still waiting for fic to reply with the recommended settings.

 

[AWD-Tony]

Thanks for the help! I have a couple more questions.

How should I set the max oct. Table in da. Just set it to what I want in the cells where I'm wot, or should I interpolate from cruise to the wot cells. Since posted the previous datalogs. The car is surging lean at idle with my lights and fan on. Is it safe to assume this has to do with the battery latency? I'm still waiting for fic to reply with the recommended settings.

You can interpolate between cruise and openloop areas (this is done in ve table). Remember the maxoct table is all open loop.

Are you saying it’s idle surging or it’s just going lean w lights and fan on? Post a log of this.

This is a good read

https://www.dsmtuners.com/threads/tuning-with-e85.366625/

 

[97eclipsespyder]

Fic got back to me with the low impedance 1650 batter offset so I'll put this in tonight when I get home and see if that helps. I'll grab a log then to. But basically it will idle fine then it will go super lean 17-21 afr and nearly stalling then it will zoom back up to normal idle and repeat it all over again about a second later. Thank you for the link I will definitely take a look at it

 

[AWD-Tony]

Sounds good. Once you plug battery offset, you’ll have to lower current deadtime.

 

[97eclipsespyder]

What do I do if battery offset fic sent me for the 1650s is more than I can put into the da table? Should I use the 37.5psi fuel pressure settings they have listed and drop my pressure?

 

[AWD-Tony]

It’s in milliseconds. Convert it to microseconds

 

[97eclipsespyder]

I did that and tried to enter the 3960 in the 9v cell but it is way to high and the da injector battery offset table only lets it go to arround 2800 or so

 

[AWD-Tony]

Just set it at the highest. Hopefully you won't ever have to worry about running at 9v