Tuners Rejoice! Free Tuning For M4.4!


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Hello guys, first thing thanks for the amount of research and write ups done on the M4.4, that's amazing !

I wanted to give it a go myself, starting with a simple task: swapping the old orange injectors for greens on my lpt V70 but I'm already having some issues. I've used the baseline data from the wiki for injector calibration, the car runs fine at idle/low load, but when I get heavier on the throttle at around 3000rpm the STFT jumps to 25% and then the ecu goes open loop. I've tried a few other values I've found on this thread, same thing.

The injectors were swapped back and forth a few times, same ecu flashed with the same base map and it works fine with the orange, so there shouldn't be any mechanical issue despite looking like an unmetered air intake somewhere.

I'm using a 456 map, which as far as I can tell is pretty much the same as 609(maybe that's where I'm wrong ? ), with the rev5_609 adx

I should only have to mess with the Adjustement Factor, Opening Time map and Temin to get it working right ?

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Attention: The first 30 or so pages of this thread are outdated. Please refer to the M4.4 Wikia article where all the relevant information is currently being collated. Before asking any questions p

Crush it.

After alot of testing and rewriting code, we finally got a useful new mod working. As we all know, some time ago my dad Piet found out how to convert to bigger maf housings with the maf factor. Conver

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On 2/2/2021 at 1:30 PM, Goupil said:

the car runs fine at idle/low load, but when I get heavier on the throttle at around 3000rpm the STFT jumps to 25% and then the ecu goes open loop. I've tried a few other values I've found on this thread, same thing.

There's a couple things to check that come to mind, although I wouldn't place huge money on this being an injector issue. If it is injector related, TEMIN and mayyybe your constant may need some tweaking. The only other injection map that sometimes needs adjustment with larger injectors is Start Basic Injection Value under the idle/startup folder, but you don't need that by the sounds of it as it mainly pertains to cold starts/idle enrichment. The other values have been tried and tested in quite a few cars so they shouldn't be the issue unless there is a hardware problem.

First thing non-related to injectors is the load threshold lambda control. If it's set to a higher load value than around 4ms on speedy snails, it will constantly be trying to pull your trims to stabilize the afr to lambda. Second, check that your ecu isn't pulling timing and enriching the mix due to knock

Edited by 50trimBin
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On 2/2/2021 at 3:30 PM, Goupil said:

I've used the baseline data from the wiki for injector calibration, the car runs fine at idle/low load, but when I get heavier on the throttle at around 3000rpm the STFT jumps to 25% and then the ecu goes open loop. I've tried a few other values I've found on this thread, same thing.

Did you go through the injector calibration process outlined at below link?  If not, do that first.  It works very well.

https://m44.fandom.com/wiki/Tuning_the_Injector_constant_and_dead_times

Edited by gdog
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On 2/2/2021 at 3:30 PM, Goupil said:

Hello guys, first thing thanks for the amount of research and write ups done on the M4.4, that's amazing !

I wanted to give it a go myself, starting with a simple task: swapping the old orange injectors for greens on my lpt V70 but I'm already having some issues. I've used the baseline data from the wiki for injector calibration, the car runs fine at idle/low load, but when I get heavier on the throttle at around 3000rpm the STFT jumps to 25% and then the ecu goes open loop. I've tried a few other values I've found on this thread, same thing.

The injectors were swapped back and forth a few times, same ecu flashed with the same base map and it works fine with the orange, so there shouldn't be any mechanical issue despite looking like an unmetered air intake somewhere.

I'm using a 456 map, which as far as I can tell is pretty much the same as 609(maybe that's where I'm wrong ? ), with the rev5_609 adx

I should only have to mess with the Adjustement Factor, Opening Time map and Temin to get it working right ?

What are you using for the adjustment factor for the greens?

The Wiki says "0.8125", but digging around I came across a post by Piet that says this values should be 0.7188. 

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17 hours ago, Chuck W said:

What are you using for the adjustment factor for the greens?

The Wiki says "0.8125", but digging around I came across a post by Piet that says this values should be 0.7188. 

If you are using stock fpr, 0.7188 should be fine.

I've flow tested my injectors before installing and all of them was 450cc at 3 bars.

Was using 0.7188 without problems for a year, before switch to 4 bar fpr.

Edited by ArMiGer
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I've been using 0.695, was spot on in the summer but now with cold there some trim corrections.

Also found someones test results for dead times, im using way lower values. Guess i must redo it.440_greens.jpg

Edited by versus
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On 2/13/2021 at 8:37 PM, Dangerous Dave said:

What TEMIN is everyone using for Greens?

All my green bins have it (minimum injection time) set to 0.24 (ms yes?).  The stock rev5b.bin has TEMIN set to 0.34.

I don't remember how/why I got that number.  The description in the xdf is a bit cryptic:

TEMIN,{minimales TE}
minimum injection time.  Scale this using 350cc/min as a reference for the stock value.

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11 hours ago, gdog said:

All my green bins have it (minimum injection time) set to 0.24 (ms yes?).  The stock rev5b.bin has TEMIN set to 0.34.

I don't remember how/why I got that number.  The description in the xdf is a bit cryptic:

TEMIN,{minimales TE}
minimum injection time.  Scale this using 350cc/min as a reference for the stock value.

Yes it is rather confusing as there is very little information about minimum injection times anyway.  I've seen lots of figures for the greens (some saying 1.10ms, some 0.5ms).

Also I thought the stock value was 315cc (as the first injectors on M4.4 were that size) but as you say the XDF states 350cc.

I'm trying to figure out why I cannot get more than 22mpg at cruise.

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11 hours ago, Dangerous Dave said:

Yes it is rather confusing as there is very little information about minimum injection times anyway.  I've seen lots of figures for the greens (some saying 1.10ms, some 0.5ms).

Also I thought the stock value was 315cc (as the first injectors on M4.4 were that size) but as you say the XDF states 350cc.

I'm trying to figure out why I cannot get more than 22mpg at cruise.

 

Very good points; beginning to think 350cc reference in the xdf comment is a typo and meant to be 315cc for the stock oranges/reds.

What are you using for TEMIN setting now?  Seriously doubt that is your MPG issue, but regarding the TEMIN setting...

The thing to keep in mind (IIRC mercuric, or someone, said this somewhere but can't find the post now) that TEMIN goes down as injector size goes up.  I.e. it's inversely proportional to injector size.  This makes sense then if you work out the numbers:

Given:

  1. stock TEMIN = 0.34 ms for stock 315cc injectors
  2. green injectors flow about 440cc w/stock FPR (at least mine do; there are some other green variants out there)

=>  315/440 = 0.7159 is your "adjustment factor".  Multiply this be the stock factor of 0.34ms and you get ~ 0.24ms; i.e. your TEMIN setting for 440cc greens.

 

Per below post, this calculation seems to work for other injector sizes too.  Per his signature he's running 750cc injectors so..

=>  315/750 * 0.34 = ~ 0.14ms

http://volvospeed.com/vs_forum/topic/159506-tuners-rejoice-free-tuning-for-m44/?do=findComment&comment=2391144

 

BTW: Where are you getting this poor mpg number; from your onboard car computer?  Make sure your "Constant for Consumption Display" factor is correct.

Edited by gdog
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On 2/17/2021 at 12:32 AM, gdog said:

 

Very good points; beginning to think 350cc reference in the xdf comment is a typo and meant to be 315cc for the stock oranges/reds.

What are you using for TEMIN setting now?  Seriously doubt that is your MPG issue, but regarding the TEMIN setting...

The thing to keep in mind (IIRC mercuric, or someone, said this somewhere but can't find the post now) that TEMIN goes down as injector size goes up.  I.e. it's inversely proportional to injector size.  This makes sense then if you work out the numbers:

Given:

  1. stock TEMIN = 0.34 ms for stock 315cc injectors
  2. green injectors flow about 440cc w/stock FPR (at least mine do; there are some other green variants out there)

=>  315/440 = 0.7159 is your "adjustment factor".  Multiply this be the stock factor of 0.34ms and you get ~ 0.24ms; i.e. your TEMIN setting for 440cc greens.

 

Per below post, this calculation seems to work for other injector sizes too.  Per his signature he's running 750cc injectors so..

=>  315/750 * 0.34 = ~ 0.14ms

http://volvospeed.com/vs_forum/topic/159506-tuners-rejoice-free-tuning-for-m44/?do=findComment&comment=2391144

 

BTW: Where are you getting this poor mpg number; from your onboard car computer?  Make sure your "Constant for Consumption Display" factor is correct.

Excellent info there buddy!

Only thing is the 0.34 is used for the 350cc 608 binary and in the 315cc 305 binary for my LPT 850 AWD which makes things even more confusing.  But like you say, 315cc in the formula seems to work for other people.

I'm using 0.29 at the moment (which is the 350cc/440cc) but will lower it to 0.24

I worked out my mpg from fuel used on a journey (filled to the brim then drove 30 miles to my workplace then filled up again).  Worked out to approx. 21MPG :( and that was highway cruising 50-70mph.

I just wanted to get my injector settings spot on to rule out any issues in that area.

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On 2/2/2021 at 9:30 PM, Goupil said:

Hello guys, first thing thanks for the amount of research and write ups done on the M4.4, that's amazing !

I wanted to give it a go myself, starting with a simple task: swapping the old orange injectors for greens on my lpt V70 but I'm already having some issues. I've used the baseline data from the wiki for injector calibration, the car runs fine at idle/low load, but when I get heavier on the throttle at around 3000rpm the STFT jumps to 25% and then the ecu goes open loop. I've tried a few other values I've found on this thread, same thing.

The injectors were swapped back and forth a few times, same ecu flashed with the same base map and it works fine with the orange, so there shouldn't be any mechanical issue despite looking like an unmetered air intake somewhere.

I'm using a 456 map, which as far as I can tell is pretty much the same as 609(maybe that's where I'm wrong ? ), with the rev5_609 adx

I should only have to mess with the Adjustement Factor, Opening Time map and Temin to get it working right ?

Ended up being a massive diagnostic error on my side 🙄 I used the hose clamps that came with the AEM 320LPH fuel pump, it worked fine when the hose was brand new but as it got softer sitting in the tank it wasn't making a proper seal on the carrier side...

Everything works fine now !

I'm using 0.29 TEMIN as well, but 0.24 makes more sense

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On 2/22/2021 at 1:11 PM, Goupil said:

Ended up being a massive diagnostic error on my side 🙄 I used the hose clamps that came with the AEM 320LPH fuel pump, it worked fine when the hose was brand new but as it got softer sitting in the tank it wasn't making a proper seal on the carrier side...

Everything works fine now !

I'm using 0.29 TEMIN as well, but 0.24 makes more sense

You need to use fuel injection hose for the one that sits in the tank. Its different from normal fuel hose.

 

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  • 3 weeks later...

Hello guys,

This is gonna be a pretty long post, so please, bare with me !

   5 years ago Piet and Venderbroek modified my bin in order to enable wideband lambda regulation and boost threshold control (I’m sure a lot of you are using his mod without issues as we speak). First version they sent me had something wrong in it because the car didn’t start, but the second modified file they sent me seemed OK.

   Since then, I banged my head against the wall to manage having a good and stable AFR to no avail.

   Current setup :

   - 2.3 T5 engine
   - S90 MAF
   - Green injectors
   - 16T turbo
   - Forge FMDV001 dump valve
   - AEM Uego wideband controller with BOSCH LSU4.9 sond, connected to rear O2 sensor (I know about the offset, I’ve rewired internally rear HO2S minus signal to ECU ground
   - Motorola Boost sensor soldered in ECU and wired to tank pressure sensor.
   - Adaptive knock disabled until everything is setup correctly

   I’ve used the injector calibrator supplied by Piet and Venderbroek and the calibration procedure in order to obtain an AFR close to 14.7. I’m using a mean value from the last 10 measurements, and I’ve also “loaded” the S90 MAF into the bin used by the injector calibrator.
   All goes well (I’ve found good values to be injector constant = 0.7109 and dead times = 0.7215) and the values reported by the injector calibrator correspond to the values on my AFR gauge, so I guess everything is wired correctly. I then dialed the values in my BIN (which was scaled with the MAF scaler we all use to adapt for the S90 MAF).

   Well, here goes the fun part. The VE MAP for the idle load (1ms) and 850rpm requests for an AFR of arounc 15.1 (value taken from TunerPro dashboard). But at idle the AFR gauge only swings from 14.2 to 14.7. The same values shows in the TunerPro dashboard (formula I use in the ADX for AFR is X*(5/256)*2+10 (5 volts, 256 bits, *2+10 used to match the AFR in the AEM UEGO datasheet). At the same time, although the AFR is richer than what's requested in the VE map, STFT is somewhere between 6 and 10 (so it's still adding fuel)

   I can’t for the love of me understand what’s going on and what’s with this difference.

   Things I’ve checked :

   - Absolutely no vacuum leaks whatsoever (intake system pressure tested at 1 bar)
   - Voltage drop between battery and fusebox measured to 90mV, so power wires are fine.

   Unfortunately I couldn’t reach neither Piet or Venderbroek to clear things up, received no response from them

   For all you guys still on the wideband and boost mod, could you please help a brother ? Here’s some things I noticed and please, be so kind and confirm if your BIN has the same values

   - At idle, MAF measures around 15kg/h (could you please confirm that is a valid value for an S90 scaled MAF? I remember around 12kg/h should be the right figure) – maybe bad MAF scaling ?

   Some differences in the wideband modded BIN to a stock BIN which I found raised myself some questions :

   - LTFT Lower limit Upper limit and Reduced upper limit are set to 0 on both banks
   - STFT Lower control range / Upper control range is set to -100 and 99.2 respectively
   - Load theshold for lambda control is set to 12.24 (all cells) in both lower and upper banks
   - TPS Angle for WOT detection is set to 106.25 in all cells

   Another weird issue I have and don’t know if it’s related:

   If, from idling, I brutaly floor the throttle, it goes perfectly to limiter and back
   If I press the pedal ever so slightly (less that 1cm of pedal travel), the engine starts revving slowly, and around 1500rpm the AFR goes to over 18 (AFR gauge out of range), the engine stutters for 2-3 seconds, then picks up and continues revving slowly up to 2500 rpm or so, and the AFR goes way back to pig rich, and then stabilizes back to 14-15 (swings). It’s very unpleasant when driving slowly and changing gears at low RPM because the car stutters as if it’s receiving no fuel. I couldn’t find any mechanical issues (it did the same thing when I had the 2.5T LPT engine)

   Really hope I’ve managed to structure this message right and you’ve read it whole.

   Help ! :)  

Edited by Midnight Caller
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Hi,

I haven't tried the WB mod yet. I got it but have not tested it. Have you tried to plug the dumpvalve? How is it connected in terms of air-recirculation?

My own issue right now is how to make stable rpm's/afr at idle with my supercharger engaged (magnetic clutch). The extra airflow tends to disturb the MAF a lot...  😎

// Turboforslund

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