Pages: 1 ... 5 6 [7] 8
Author Topic: 1.8T engine is running too rich - Long Term Fuel Trim -19% please help :(  (Read 80233 times)
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #90 on: February 18, 2015, 11:23:43 AM »

intake leak post maf, pre-inlet

or bad MAF.
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
10101011
Full Member
***

Karma: +10/-13
Offline Offline

Posts: 161



WWW
« Reply #91 on: February 18, 2015, 05:56:06 PM »

I am thinking the same as Nyet.   
Logged

Poor quality lingers long after the price is forgotten ....
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #92 on: February 18, 2015, 06:10:56 PM »

Err. I take that back, metered air is missing, so pressure side, post turbo. Pressure test either way.
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM


« Reply #93 on: February 18, 2015, 09:09:16 PM »

Sorry guys but pressure test with 2 bar was negative!
Logged
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #94 on: February 18, 2015, 10:01:08 PM »

O2 sensors, MAF, EGT
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM


« Reply #95 on: February 18, 2015, 10:20:25 PM »

Rear o2 is deleted, MAF is testet with diodetest, EGT i dont have!

The only thing is pre cat lambda, but the lambda regulition is disabled on full throttle, isn't it??
Logged
4ringpieces
Full Member
***

Karma: +4/-4
Offline Offline

Posts: 232


« Reply #96 on: February 19, 2015, 10:44:26 AM »

Brake servo pipes split, recommend you check them from inlet all the way back to the servo
Logged
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM


« Reply #97 on: February 19, 2015, 09:07:29 PM »

I checked the vac  line to the brake booster, the silly pump and the other vac lines i have removed!

I got a vac line from the intake manifold over a check valve directly to the break booster
« Last Edit: February 19, 2015, 10:05:41 PM by funnix » Logged
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #98 on: February 19, 2015, 11:01:07 PM »

Is it a wideband car? If so, post logs. If not, get a wideband.
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM


« Reply #99 on: February 19, 2015, 11:33:54 PM »

Yes, it's wideband! Nyet, can you help me to log the right blocks?

I got VisualME7Logger, in the evening i will do some logs.
« Last Edit: February 20, 2015, 12:08:06 AM by funnix » Logged
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM


« Reply #100 on: February 23, 2015, 12:18:54 AM »

Which values could be helpful to find out more about the problem?
Logged
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM


« Reply #101 on: February 26, 2015, 12:09:01 PM »

Sorry guys for doubleposting, but could the rear o2 removing cause the problem with the negative fuel trim?
Logged
nyet
Administrator
Hero Member
*****

Karma: +604/-166
Offline Offline

Posts: 12232


WWW
« Reply #102 on: February 26, 2015, 12:10:08 PM »

no, if you coded them out correctly.

and even if you didn't, I am unsure how you'd end up with a double digit trim.
Logged

ME7.1 tuning guide (READ FIRST)
ECUx Plot
ME7Sum checksum checker/corrrector for ME7.x

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience.
userpike
Hero Member
*****

Karma: +22/-1
Offline Offline

Posts: 763


« Reply #103 on: February 28, 2015, 12:28:29 AM »

it is my understanding that if you hear air rush when you pump the brakes along with idle changes and vacuum changes, the brake booster itself/lines/checkvalves has a leak. The brake booster should hold a vacuum during its test. I guess you could plug up the port  on the intake manifold used for the brake booster and see if trims change. It might be hard to stop though.  Tongue
Logged
funnix
Full Member
***

Karma: +1/-0
Offline Offline

Posts: 76


1.8t AUM



Thank you guys,

i will test like userspike wrote.


@Nyet: I've forget to set CLRSKA to zero, because i don't have the right adress for ist in my 0032FC XDF.

So if anybody have the adress please post!

Logged
Pages: 1 ... 5 6 [7] 8
  Print  
 
Jump to:  

Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Page created in 0.052 seconds with 17 queries. (Pretty URLs adds 0.001s, 0q)