Poor idle: oscillate *Siemens Deka and S3 MAF**

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schattenparker

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	Poor idle: oscillate Siemens Deka and S3 MAF* « on: June 13, 2013, 01:31:41 PM »

Hello guys,
i have the following Problem:
Golf 4 1.8t with gtx28.

So the car runs great besides idle. Lambda in idle ist 1 but the car oscillate arround 600 u/min and 1000 u/min. When i changed to original MAF and injectors the car get a perfekt idle.
I changed some axis in FKKVS and in the MAF compensatze Map (replaced from the originale S3).
Is there any more Map that i have to Change?

best regards


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vdubnation

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #1 on: June 13, 2013, 01:40:56 PM »

dekas are horrible at idle i had to raise my idle to stop some miss fire

increase these got these from tonys stage 3 helped me out alot
NLLM - Raised idle speed to help with misfires
KFMRESK - Raised base idle torque with clutch depressed to help with misfires
KFMRES - Raised base idle torque without clutch depressed to help with misfires

also how are ltft's idle trims ?
post your tvub,kvb


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schattenparker

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #2 on: June 14, 2013, 03:02:38 AM »

KVB is only for calculating consumption on instrument i think.

TVUB:
8 10 12 14 16
1,8802 1,2295 0,8748 0,6454 0,4747

trims are arround:
STFT: +1% and LTFT -3 %

I haven`t any missfire. The only problem i have is the oscillate at idle.
Are there any more maps? I tuned a s3 with DEKAs for a while and there are no problems at idle.


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vdubnation

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #3 on: June 14, 2013, 06:35:48 AM »

heres my tvub not sure if it will make a diff.


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schattenparker

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #4 on: June 14, 2013, 10:49:14 AM »

Whats your krkte and fkkvs? 3 bar fuel pressure regulator?

If i have enough time tomorrow, i will test again.


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schattenparker

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #5 on: June 15, 2013, 09:08:45 AM »

Problem solved. Little tuning with fkkvs ans car runs perfekt.


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catbed

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #6 on: June 15, 2013, 01:46:03 PM »

Quote from: schattenparker on June 15, 2013, 09:08:45 AM

Problem solved. Little tuning with fkkvs ans car runs perfekt.

What did you adjust in FKKVS? Add fuel at low PW?


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schattenparker

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #7 on: June 15, 2013, 11:33:42 PM »

i decrease fkkvs and increase krkte.
So i have values arround 0,893xx in fkkvs.


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vwaudiguy

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	Re: Poor idle: oscillate Siemens Deka and S3 MAF* « Reply #8 on: July 28, 2013, 11:17:34 PM »

How far apart were these oscillations?


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