Boost by pedal in G4X and random car start

[dx4picco]

Something that I did on G4+ seems not to work on the g4x, namely a WG duty table with rpm and tps as axis.

if the table is full of values, like that https://drive.google.com/file/d/15njj25iDZt6qIvj1dawACTSNs4Oh0QUt/view?usp=sharing

then the DC is taken into account.

but if I take a wg duty by pedal, like that https://drive.google.com/file/d/1loqZ_X9bJx-3h_w-Ze6DNCbJ6_bmzpCp/view?usp=sharing

then the wastegate duty stays at 0 during the log and boost stays like duty=0%

during the drive the crosshair goes into the cells in row 100tps for example but duty stays 0 in logs anf boost low.

in this log https://drive.google.com/file/d/13BqZAQY80sQ67eSEy2qfUIW_nWHBURoT/view?usp=sharing

first 2 pulls were made with full table you see about 200kpa and 190, then I tried boost by pedal and nothing happends (160kpa, gate pressure on stock ihi vf24)in the following pulls.

there is one hump at 9% in the middle that I don't remember where it did come from.

edit: and that is not all with this calibration  file:

https://drive.google.com/file/d/1urWlq4OxD4hIzeoAjNe2eBbMWuXx7LLV/view?usp=sharing

you can see in this log https://drive.google.com/file/d/1PtlsjTKcis13Hy1yQVBc3EdK9zaz87VD/view?usp=sharing that the WG duty stays clamped at 35% and doesn't ramp up like it should up to 70% with the rpm. duty is the same with TPS varying there.

 

any clues / inputs @link guys?

[ellisd1984]

Can you not do closed loop boost control and use the target boost table and have one of the axis set to tps?

 

[dx4picco]

that's not the goal here. the end goal is having open loop boost control with modulation through tps and quick spool function with the target boost and PID at 0.

[mapper]

Are you sure the right boost table is active? 

[dx4picco]

I guess yes, table 1 is for pump gas, table 2 will be for e85, it is planed to be a e85 switch. for for now multifuel blend is on 0%

[Vaughan]

Had a quick look at your tune and your boost target is always set to 0 which means that you are entering stage 3 as soon as boost control starts and because your Base DC Mode is set to Stage 2 and your PID values are 0s it will just keep using the wastegate DC value it had in stage 2 (which it passed through immediately).

[dx4picco]

well, I guess rooky mistakes from using a basemap. One of the setting sliped through

[dx4picco]

I am having difficulties with engine start that I can't explain.

the most obvious is in this log from warm (https://drive.google.com/file/d/1OTuNjsVCuZAIQTbUpM5ZP874mJQR4QkY/view?usp=sharing): with exactly the same parameters,every second start the car starts right up like it did on all the ej20 I did tuneon g4+, but then every second start it sputters once then continues to crank and finally starts but it doesn't feels right.

cal file: https://drive.google.com/file/d/1urWlq4OxD4hIzeoAjNe2eBbMWuXx7LLV/view?usp=sharing

trigger scope during a difficult start with warm engine: https://drive.google.com/file/d/1L8dNwHEArzKJXugtZKtJB6-i86_MMLvx/view?usp=sharing

even with cold starts its not that good in my opinion: https://drive.google.com/file/d/1b1CYWWVnawFMfePHVr6TxOzzrq9BhwLr/view?usp=sharing

I tried anything front trigger thresholds to different crank enrichment/hold times/ prime times/ and its always hit and miss.

that's something i've never been confronted with on g4+. any input on that?

 

thanks!

[dx4picco]

any thoughts on that?

[Vaughan]

Maybe it's not quite syncing right but the only thing I could think of there is arming voltages.

Maybe more advance in the 0RPM 80kpa Ign table cell might help but I'm just guessing here.

[dx4picco]

should I go lower or higher with the arming voltages? stock is 0.5v and 2.0V in the first columns, I tried from 0.3V up to 0.8V, and 1.5 up to 3 without changes.

For the ignition angle, I tried dropping it like that because when I look at the logs, as soon as the ecu sees rpm, it commends 12° btdc even though my ignition table 1 is way less. so I have basically no influence on that

[Adamw]

In all of your start attempts is syncs very quickly so I dont think it is a trigger issue.  

One thing I notice in your log is your accel deadband is too low so at idle due to the noise on your TPS signal you have accel enrichment continuously being pumped in. This may mean the VE numbers in your fuel table are a bit skewed from this extra accel fuel. 

I would also make the first two columns of you fuel table much flatter - so you have the same VE all the way down.  This is because when cranking you are operating in/near the 0Kpa cell so MAP it is not a good indicator of load in those columns.  It is easier to tune if you take this variable out by making the cranking columns flat.  

[dx4picco]

looking back at my request on that car, seems like his issue with starting came with WW comp

I'm running like shown in the cal file 60% wallwetting, 0.3ms asyncro and 2.0 accel sens table.

when I did tune it, increasing WW did help quite alot with accel enrichment, but it seems like it was written that it inpeeds my startin problems (exactly like him, either it starts, or its flooded like shown by the very low afrs on misses)

how shouls I go about it? remove also ww and increase accel sens table?

[dx4picco]

I'm posting in this topic because a new issue related to this car (my dads car) came today.

I started it to move the car around, but the car ran pig rich (afr pegged at 8.0 and fuel dumping out tof the exhaust)

I thought one injector got stock stuck open, so I parked it and removed the fuel pump fuse to hopefuly clear as much as possible. injectors are about 1.5 months old.

now I cannot connect to the ecu (g4x plugin for v3-v4 subaru) with any of my computer or tablets. so I am unable to test for injectors ticking

how should I go from there? I will ask the question but I know the probability is very low, can it be an ecu problem causing both issues?

could you help finding a way to find out what is going on?

[Adamw]

With ignition on, engine off, is the power LED on the ECU on?

[dx4picco]

indeed no blue light to be found on the ecu. when engine off and ignition on

[Adamw]

Need to follow up where the power has been lost, most likely just a blown fuse or bad relay.

[dx4picco]

ok, i tested all the fuses, all were ok, the catch was that somehow ecu power goes through the fuel pump fuse.

as I pluged it out to avoid flooding the engine there was no power.

I got to test the injectors, all are ticking.

[dx4picco]

here is a log I just made of the startup

https://drive.google.com/file/d/1UFKpKOgvO2YTlcrkU5ryKoy2d4eDzKhi/view?usp=sharing

an then just after with fuel pump disconnected

https://drive.google.com/file/d/1RyiulS7BZac7Y9sS3N0VW92Kv118hm2z/view?usp=sharing

car ran perfect after I tuned it, car never sat longer than one week since the injector install,

is there anything obvious in the log that I missed?

 

edit 356: found a mechanical failure of the injector cap (?!)on cylinder 1 that lead to the bottom Oring from the sidefeed injector pushed through