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tao13
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« on: September 04, 2020, 07:19:24 AM »
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Hi all. I have a problem with idle from some days.
What i saw is rpm at idle fluctuate between 720 and 780 and with it afr fluctuate between 14.2 and 15.7 and in the same time the timing advance fluctuate between 10degree and 29 degree ( i defined my kfzw and kfzw2 at 800 rpm and 10% load with 29 values).
I specify next thing are ok and tested:
- no leak vaccum/noboost
- maf is ok
- map is ok
- vvt is ok
- engine haf only 4000km (all new inside)
- all negative wires are ok
- o2 wideband sensor is ok , had only 4000km too
- 02 second sensor is disabled
- no cat from years
Who is first who cause this thing? timing , afr or voltage?
Some advice please?
Thanks
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yxx499
Full Member
Karma: +4/-10
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« Reply #1 on: September 04, 2020, 07:55:28 AM »
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The tuner  |
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tao13
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« Reply #2 on: September 04, 2020, 10:12:57 AM »
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hahahhaha, what a joke.......car works greate before 2-3 days ago.........something happened..........the tuner was the same......the tuner am i, so fogot about the tuner
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nyet
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« Reply #3 on: September 04, 2020, 11:44:08 AM »
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coolant temp sensor? crank position sensor? throttle body sticking/needs adaptation? accel pedal pot?
definitely a hardware problem, these things are hard to track down.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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 ex
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tao13
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« Reply #4 on: September 04, 2020, 12:06:45 PM »
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thanks again nyet
-coolant temp sensor is ok , verified with iat sensorat the cold starting
-throttle bodu was cleaned 4000km before when the engine was build , and it s clean now too
-throttle position was logged and it is ok
maybe crank sensor , but i think it must make problem in the running too
i suspect a big consumption who influence the injectors and coil
i will write here when i have a result
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tao13
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« Reply #5 on: September 23, 2020, 06:53:26 AM »
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for the moment i don't find the problem
suspect the cranck sensor or an injector
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Auriaka
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« Reply #6 on: September 23, 2020, 08:25:34 AM »
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Going off of information that you have pisred and what you described.....
Thatss pretty big swing for timing. When I have had this happen before actual load was greater then request and pissed it off.
Do a log and watch your request load and actual, and warch throttle plate angle... if your kfmirl and kfmiop are good, and kfped is sane.. you could try numbing wdkgugn a little at that rpm.
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nyet
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« Reply #7 on: September 23, 2020, 11:21:42 AM »
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-throttle position was logged and it is ok
if this isn't the accel pedal pot, make sure to check accel pedal signal. |
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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 ex
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tao13
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« Reply #8 on: September 28, 2020, 11:30:13 AM »
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thanks guys , will check these days
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tao13
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« Reply #9 on: September 28, 2020, 10:42:02 PM »
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Hi Auriaka. About my problem , is not on the running, it is an idle. I don't modified irl/iop and kfped. They are the same from 1 year and the car works ok at idle.
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tao13
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« Reply #10 on: January 06, 2021, 06:30:28 AM »
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Problem not resolved.
I checked every hose , every valve........nothing broken, no leak.
Aster 1 minute at idlr Afr goes crazy.
KFPED standard
IOP and irl stock before 150%.
KFMRES stock
MLHFM stock with stock maf case+sensor.
I resolved adaption at idle to be constant and looks ok 0.8% but afr and lambda control after 60 seconds goes crazy.
It is 5120 hacked file.
TEMIN and TEMINVA are 0.3 for 731cc injectors.
Torque intervention is disable!
Can be from the map sensor 4000mbar because it's minimum value can read is 500mbar?
I tried to put idle rpm at 800, but seems a little better.
Please some advice.
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« Last Edit: January 06, 2021, 10:23:09 AM by tao13 »
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nyet
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« Reply #11 on: January 06, 2021, 11:33:27 AM »
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Can you try with a non-5120 hacked file? Yes, you won't be able to read high boost, but at least to see if the 5120 is causing the idle issues.
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ME7.1 tuning guideECUx PlotME7Sum checksumTrim heatmap toolPlease 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 ex
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tao13
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« Reply #12 on: January 06, 2021, 01:28:56 PM »
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Can you try with a non-5120 hacked file? Yes, you won't be able to read high boost, but at least to see if the 5120 is causing the idle issues.
I had the same setup with same tvub and krkte on non hacked file. Idle was much better. Forgot to say i use 4bar fpr with krkte 0.04951 , temin and teminva 0.3 and next tvub 8v 2.00 10v 1.29 12v 0.86 14v 0.56 16v 0.44 All fkkvs kfkhfm and kflf are 1 not touchd yet. I don't have any solution to resolve this, what is strange idle make like this from time to time and especially when colant temp is over 90 degree! |
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« Last Edit: January 06, 2021, 01:55:47 PM by tao13 »
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doublerwest
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« Reply #13 on: January 07, 2021, 04:03:40 PM »
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Go back to stock and then check to see if it still fluctuates.. Throttle body could have gone bad... I chased my tail for awhile until i pulled throttle body off and looked at it in the light. Body wasn't closing all the way all the gears and stops are plastic and it wont seat properly and bounce closed to open!
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W357
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tao13
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« Reply #14 on: January 08, 2021, 09:51:07 AM »
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Go back to stock and then check to see if it still fluctuates.. Throttle body could have gone bad... I chased my tail for awhile until i pulled throttle body off and looked at it in the light. Body wasn't closing all the way all the gears and stops are plastic and it wont seat properly and bounce closed to open!
Thanks for your opinion but i replaced the throttle 2 weeks ago to test if is its fault. IT doesn't. |
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