Car Audi MK1 225 BAM 1.8T,

Hello,

After changing the injectors from 386cc to 440cc and installing an uprated fuel pump I'm having troblems with the AFR peaking & troughing at WOT, see attached screen shot.


I've changed the TVUB;

V           MS
7.96           2.098
10           1.321
11.97   0.919
14.01   0.67
15.98   0.47

and the KRKTE to 0.07404

Any ideas on how to rectify this would be most appreciated.

Thanks

Further information for clarity;

-> Bootrom Version = 05.12
-> EPK = 40/1/ME7.5/5/4018.10//24b/Dst04o/061000//
-> Contents of ECUID data table:
   - '0261206795'         (SSECUHN)
   - '1037360313'         (SSECUSN)
   - '8N0906018H  '       (VAG part number)
   - '0004'               (VAG sw number)
   - '1.8L R4/5VT     '   (engine id)
-> Contents of ECUID data table:
   - 'HW_MAN004'

Full list of mods;

- 440cc injectors
- Uprated fuel pump
- Mushroom Air filter
- New TIP's (Badger5)
- Stainless tubular manifold
- F23 hybrid Turbo
- 3" full exhaust & down pipe.
- Decat

Purchased to be installed
- FMIC

Other points of note;
- Rebuilt head
- New cambelt
- New water pump
- New oil pump
- New transmission oil
- New Haldex oil & filter
- Rebuilt Brakes
- Coilovers
- Little tree air filter (Vanilla)
 

Good thing you posted logs.

I saw this and I'm not even going to bother looking at your fueling

Are you kidding me? Did you read any of the warnings on the tuning page about the MAP limit and boost request? Your motor isn't going to last long with this level of dumb.

I thought it was the cheap 440cc non-branded injectors, so I purchased real Bosch 550cc 0280158117 and changed the;

TVUB to 8V-2.0002, 10V-1.3495, 12V-1.0001, 14V-0.7788, 16V-0.6187 (not 100% sure about these)

KRKTE to 0.05927

The result was the same

So I have applied the factory map with the above TVUB and KRKTE with the modified LAMFRA.

The result is the same but not as pronounced.

Any Ideas\help would be most appreciated

Log, AFR screen shot & LAMFRA screen shot attached

Thanks

Ian

.

As a test I just tried using the attached table using the 44.95 PSID correction factor (to populate the TVUB), it's better but still not acceptable.

Has anyone got the voltage offsets for the Bosch 550cc 0280158117 at 3 Bar as I'm trying to find definitive offsets which someone is using and works & it's like trying to find Lord Lucan?

There are a few sources on the fountain of all truth & justice (the Internet ) but none of them match up, I've tried a couple without success.

Thanks

PS

Tried Bosch direct and they won't give out the information.

Another avenue closed ,

Where should I be looking, the other correction tables FRLFSDP & FKKVS?

These look like another can of worms

I have noticed tha these tables in the factory map are zero'd out?

Absolutely not.

You need to fix primary with MLHFM, KRKTE to get to within 5% part/wot FIRST. If you can't do that then you have severe hardware issues.

Then TVUB for idle.

Then you can use KFKHFM/KFLF/FKKVS for the rest, and fine tune cold/warm start.