3.3TT ECU_PSI is varying inexplicable

[tecjonny]

Hey alltogether,

I finally coming to opening up an thread in hope, your swam knowledge could help in my very very weird case. So I'll try to explain my problem as short as possible in steps. Please mark, i'm living in southern germany.

1. Stinger GT 3.3 OPF 2019, 45.600km (~30.000 miles), runing all good before JB4. Bastuck exhaust + K&N already installed
2. Installing JB4 + gapped HKS with all additional BMS wires that exist
3. experienced ECU_PSI from above 14psi since the very first Log

so basically i already made over 1000 miles with the jb4 and only have problems, which occure not continously. The basic problem is, that the ecu_PSI is unintentionally waaaaaaaay to high, goes sometimes up to 19psi - absolutely NO matter, in which Map i am in. I also made a complete restock to the system, which means i disconnected ALL cables from JB4 and drove the car on stock - still could see the same problem with the car demanding up to 19psi over an independent obd-measurement.
So i checked all stock cables, reconnected them, couldnt find anything, also did a ton of battery disconnects to reset all the system. Last time was a week ago, after i disconnected the jb4. after connecting the battery, i drove couple miles without any problems, couldn't even provoke it with the casual cases like full gas on 5th etc.
After i didn't get any more problems i thought about connecting the jb4 again - drove it since then on Map0 and let it learn for 100 miles. No problems at all, ECU-PSI all the way max. 14psi.
But yesterday was the big disappointment since the restless gas pedal was noticeable, which always meant a unclean psi, so i opened up jb4 and saw again ECU-PSI with 17+ . Tried Map0 and map3, getting continously bad ecu_PSIs...
I'm honest that i'm pretty speechless now and no further ideas, what it could be on this point... I spent a lot of miles on the road figuring out, what the problem could be. Spent lot of litres of best 102 octane European ARAL gas (should be around 96+ in the states), tons of logs, exchanged the EWG_cables, turning bit0, 1, 5 off, etc.pp.

But since the problem also occured without the JB4 inbetween, i have to have some other problems with my hardware. But also those did occure after installing the Jb4 for the first time and first Log.

I'm inbetween failures with EWG, mass air flow meter, something with fuel pump?! I'm overwhelmed and wanted to ask, whether some of you guys have an idea, what i could check next?!
My logical next step for today would be, to disonnect the battery for 30 mins and drive the jb4 with map0 and monitor, what ecu_psi is doing on a 100% pull...
I have estimated a trillion logs, but here are only some:

Last Map0 without problems

Last Map5 run without problems

Map3 with problems last time

Map0 since yesterday questioning my life decisions

Greets

 

[Terry@BMS]

You'd have to attach the CSVs to the post if you want me or anyone to look at them.

 

[tecjonny]

You'd have to attach the CSVs to the post if you want me or anyone to look at them.

Hi Terry,

Sorry, i thought the google drive Link was okay.
Here you go:

So the maps are basically Map0 and Map5 without problems on the same day, that was couple of days ago.
And Map3 and Map0 Newest problems are after it worked for quite a while and out of nothing started with those unusual ECU_PSI again.

PS: I'm in communication with Marian all day for the past couple weeks. We're both out of ideas, what could be wrong with my car, why i'm asking for help in here. Otherways, the next step would be to dissambly all changed parts and ask for a date at the dealership (which could take weeks).

 

[tecjonny]

So, update for now, perfect example how everything is fine right now.
I disconnected the battery, checked all JB4 cables, equipped them with just a bit of contact spray, checked both ecu connections, checked jb4 OBD connection, read codes with an independent OBD after re-equipping car with battery, deleted everything, reconnected jb4 and flashed it on v28 (just curiosly) and drove an map0 out of stand without any suspicisous values.

It's like the ecu is learning some faulty values over time and raises up the ecu psi after couple miles... Last time i made this reset (1 week ago), i drove with this stats on map0 for 100 miles without ANY problems. After i switched on map5 and did couple of runs, it still didn't raise the ecu psi. But after driving couple times it reoccured again, even with map0 (as described in original post).
I'm soooo curious, what my car want's to tell me

PS: Small info btw: I'm living in 700m/2100ft above sealevel.

 

[Terry@BMS]

I opened the "map 3 with problems" log but I'm hard pressed to see any problems. What do you think is wrong with this exactly?

 

[tecjonny]

I opened the "map 3 with problems" log but I'm hard pressed to see any problems. What do you think is wrong with this exactly?

You dont see any problems with ECU_PSI on 19?! Especially with Boost2 on nearly 25psi?
imho that's way to high, because if i drive on map0, it also goes up to 19psi, both ecu_psi and boost2.
I mean i can also feel it with extremely unsteady ignition while being on half gas, f.e. driving in the traffic and just casually flowing on the street. The acceleration feels extremely unsteady, car drives really bad. Restart of the car sometimes help for a short time, sometimes it just needs 1-2 boost-ups and it's back again.

 

[Terry@BMS]

Is your concern that your boost is just higher than normal? If so lead with that because the issue has nothing to do with ECU_PSI. Boost is likely from your modified exhaust combined with cooler weather.

Use JB4 EWG connectors to slow down the turbines if you're looking to run less boost. Start with FF = 35.

Also I only check this forum once every couple of weeks so email us if you need quicker support on it.

 

[tecjonny]

Update for this case: I made an appointment at my kia dealer, which is sadly in a month.
But my befriended tuning specialist made an true point, that P0018 failure could really cause a way bigger problem, than i thought. This failure could lead to an dirty cvvt, which leads to an unclear camshaft position, so the sensor puts out the failure. Every once in a while it also occurs Motor Check Light. So we're regarding this theme untill i'm doing more with the jb4.

I'll inform on further informations in here.

 

[tecjonny]

Update again: We're currently waiting for new timing chains! The shop found out, both timing chains on the banks have lengthened in an unusual way. Those apparently occused false sensor recognitions on both banks, which led to false recognized timings on the CVVT. That's why the gas always produced unsteady wastegate status and also different states on the Camshaft Timing. So the whole timing chain, rails etc. going to be changed.

What a crazy and also annoying problem... especially with my low mileage of only 29.000 miles on the clock. And the car also is staying there for already 3 weeks and still no delivery date for the hardware...

Greets