1.8T idle AFR problem

Pages: [1]

« previous next »

Author

Topic: 1.8T idle AFR problem (Read 7060 times)

alperx

Jr. Member

Karma: +1/-1
Offline

Offline

Posts: 25

Always be your own dog.

	1.8T idle AFR problem « on: August 24, 2011, 11:05:13 PM »

Hi
I have an Audi A6 - 1999 - AJL - 1.8T - 180hp - ecu : Bosch me3.8

I changed the turbo, manifold, injectors (siemens 630cc).
I changed the ecu chip with the re-flashable one.

I modified the part throttle map according to the injectors to find a reasonable AFR for using the car.

However, expectedly, I could not set the IDLE AFR with the Part Throttle map.
I also could not set the WOT AFR with this part throttle map.

So I have some questions if you don't mind..

1. What maps should I modify to change the IDLE AFR and WOT AFR ?
2. Is there any address for changing the Overall Fuel Trim ?

I have an excel file for the Me3.8 ECU in German - and I find it too complicated to find what I need.. I'm trying for 1 week

file is : http://www.alperileri.com/me38.xls

Any help will be SOO appreciated..

Regards,
Alper


	Logged

True Females

NOTORIOUS VR

Administrator
Hero Member

Karma: +58/-7
Offline

Offline

Posts: 1056

	Re: 1.8T idle AFR problem « Reply #1 on: August 28, 2011, 08:57:35 PM »

If you've replaced your injectors you will need to adjust the dead time and the calculated fueling variable to get started.

Put the part throttle map back to stock..

Then plug in the proper dead time corrections into this map:

$09563 Spannungskorrektur 5x1

The problem is that I don't know how that ECU determines the base fueling variable... or what it's called... I did a quick search but couldn't find anything... maybe someone else can chime in on it.


	Logged

SCHNELL ENGINEERING BLOG · STANDALONE ECUS · TUNING · DYNO · WIRING · PARTS · VEMS
Google Talk: NOTORIOUS.VR
n00bs start here: http://s4wiki.com/wiki/Tuning

RS-MAD

Jr. Member

Karma: +3/-1
Offline

Offline

Posts: 46

	Re: 1.8T idle AFR problem « Reply #2 on: August 29, 2011, 12:58:25 PM »

There is injector constant like krkte and there is multipleyer constant.
Names are Grundanpassungsfaktor and Grundanpassungskonstante ...

Hope this helps .. Pay atention that Grundanpassungskonstante change the MS scalar of tables ..


	Logged

alperx

Jr. Member

Karma: +1/-1
Offline

Offline

Posts: 25

Always be your own dog.

	Re: 1.8T idle AFR problem « Reply #3 on: September 21, 2011, 01:27:37 AM »

Alright
thanks for the help..
I changed the injector constants as you told : bingo, it works but there's a problem that has NEVER been solved.

The car starts normally when it's cold, however it doesn't start easily when it's hot.
After half an hour drive, when I turn off the ignition, and try to start the car again, I have to hold the ignition at least 10-15 seconds to make the car running.

Can you help on this matter, please ?

Thanks to this great forum community..


	Logged

True Females

alperx

Jr. Member

Karma: +1/-1
Offline

Offline

Posts: 25

Always be your own dog.

	Re: 1.8T idle AFR problem « Reply #4 on: September 22, 2011, 12:27:31 AM »

Bump Bump Bump


	Logged

True Females

maZer.GTi

Full Member

Karma: +68/-6
Offline

Offline

Posts: 246

	Re: 1.8T idle AFR problem « Reply #5 on: April 12, 2013, 02:34:36 AM »

Quote from: alperx on September 21, 2011, 01:27:37 AM

Adjust with Heißstartanhebung


	Logged

Pages: [1]

« previous next »

Jump to:

Navigation

Personal Tools

May 01, 2024, 03:25:37 PM

Welcome, Guest. Please login or register.
Did you miss your activation email?

Navigation

Personal Tools

Search