NefMoto

Hi all,

i hope someone can navigate me to what i'm missing. I really wanna learn how to tune the car properly by myself.
Since my first post, i read several posts in the Forum, guides, wiki etc.
So i got to deleted my not mounted rear O2 sensor and SAI.
Idle rpm risen to 780rpm, to smoothen idle

After that i wanted to start my tune with setting up for bigger injectors, so i bought Bosch EV6 0280155968 440cc@3bar
The engine has been completely rebuild, everything is new or known good/tested. I pressure checked for leaks nothing found, crank breather system is working and seal.

-Krkte from stock 0.103 to 0.074
-Tvub i got from another post, where it says
8V   1.8144
10V   1.2
12V   0.7648
14V   0.4992
16V   0.3808
are used in Volvo OEM setup. (Reply 16, http://nefariousmotorsports.com/forum/index.php?topic=4175.15)

My LTFT stay Zero no matter how long i drive, but my STFT are quite high (up to -24) at idle/low load. I dont know what to log, to see what i'm missing.

Try .06695 and see if it helps. I am assuming AWP so if memory serves me correctly 286cc stock. 286/440=0.65     Stock krkte X .65=0.06695

stock injectors are 317cc.

You dont have long term fuel trims because you didnt do the deletes properly. Go over your changes again to verify, or post your file and ill have a look. Also, make sure your 440s are actually real as 70% of the 440s sold are shit china clones.
 

I thought only the 225hp 1.8T injectors were 386 and the rest were smaller ???

first of all some specs of the car:
-compression lowered to 8.5:1
-engine block and head AGU
-ECU and Harness from AUM 06A906032FC
-K04-023 upgrade Turbo
-3 inch downpipe 200cpi cat
-3 inch exhaust

yes i tested the stocks, with an spare fuel rail and pump, at 4 bar they make about 317cc which matches the KRKTE from 0.103


Injectors where bought from Bosch authorized dealer, also tested by myself they are all about 435cc. But you are right, must have to do something with my deletes. Took my Original file and just modified KRKTE, TVUB, KVB and LDRXN (just to get rid of the boost leak error the big turbo causes)
After flashing i let the engine idle for 10 min, then i drove about 15 min stop and go 0-50km/h without building boost through the city. Fuel trims are good as far as i get it. I am unable to post the VCDS screenshot?
The problem now is, at boost (got AFR Gauge) my AFR is fine, as i would expect it about 12.5.
In idle it drops to about 10.6 - 11.4. Could this be caused by the now appearing errors from rear O2, SAI and N249?

Maybe now i can post the picture. Excuse it beeing no screenshot, vcds stopped displaying while using snipping tool.

Iirc it could be caused by rear o2 dtc
Just code them out
Also with that rich youve got a primary sensor curcuit malfunction dtc due to poisoning

Maf issues could also be the reason of fueling
Post logs

440 are old crap why do even you buy them in 2021 ? Its ridiculous
Also cr 8.5is too low for k04023

^^^ what he said

The injectors are required for getting the car street legal, compression is this low, cause i think after getting street legal i`ll go K04 GT28 Eliminator, its already laying around here :D



For fueling, there is no error stored.
I think tomoroww i got time to code rear O2 out.

For logs, i would use me7logger, i log:
-rkat_w
-fra_w
-fr_w
-lamsoni_w
-lamsbg_w
-nmot
-mshfm_w
-te_w

anything else to log for getting fuel trims right?

here is the file, i would flash for the fuel trims, with added rear O2 and SAI delete. maybe u still wanna take a look. 

well, since it was clear weather and there was nothing better to do, i flashed the file and hit a run to and on the highway. the full throttle pull on the highway starts at about line 5050, i did pull gears 3,4 and 5

I grabbed this tune as a temp tune until I get new 630cc's but may just go for a better 550 or 750 set

Frankly it runs quite smoothly. I am only running 12-14psi.

AWP ecu/harness
0280150558 42lb 440cc 4 hole injectors
1.8t bored/stroked to a 2.0
230-240psi compression
9.6:1 CCTA TSI rods/pistons w/intake notch added
AEB head w/VVT
Big port transvers intake
3" (2.75) MAF
Gt2871 ebay journal T25

I dont recommend anyone just willie nilly flashing internet tunes. I just needed something other than a stage 2 with stock 30lb injectors to continue getting miles and breaking in the motor.


Thank you zCruuz