Dwynell
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« Reply #15 on: November 20, 2014, 09:27:37 AM »
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B6 S4 MLHFM is the same as B5 RS4.
If I use the maf I had on the car before I don't get deviation, but with the rs4 maf with kfkhfm set to all 1s there is deviation. the only time I don't get deviation with the rs4 maf is if I set kfkhfm to .93 |
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« Reply #16 on: November 20, 2014, 09:59:49 AM »
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If I use the maf I had on the car before I don't get deviation, but with the rs4 maf with kfkhfm set to all 1s there is deviation. the only time I don't get deviation with the rs4 maf is if I set kfkhfm to .93
Something is off there, bc oem RS4 KFKHFM is 1.024 across the whole board. I agree with DD, are you sure it is RS4 oem MAF and sensor? BC, i bought one myself, and i got the same problem. act load way above req. Bought oem Maf and evrything was OK. How is fueling when you overshooting that muck load? Way too rich? |
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Dwynell
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« Reply #17 on: November 20, 2014, 10:43:22 AM »
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Something is off there, bc oem RS4 KFKHFM is 1.024 across the whole board.
I agree with DD, are you sure it is RS4 oem MAF and sensor?
BC, i bought one myself, and i got the same problem. act load way above req.
Bought oem Maf and evrything was OK.
How is fueling when you overshooting that muck load? Way too rich?
Oem based on info on box and sensor itself. if I wait till around 3k to go wot so I don't limp, load around 260 with request 230 and afr 10.8 |
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ddillenger
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« Reply #18 on: November 20, 2014, 10:52:37 AM »
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Oem based on info on box and sensor itself. if I wait till around 3k to go wot so I don't limp, load around 260 with request 230 and afr 10.8
THE. MAF. IS. SHIT. |
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nyet
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« Reply #19 on: November 20, 2014, 10:58:00 AM »
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If I use the maf I had on the car before I don't get deviation, but with the rs4 maf with kfkhfm set to all 1s there is deviation. the only time I don't get deviation with the rs4 maf is if I set kfkhfm to .93
Please post logs showing large positive deviation (which is UNDER boost, btw) BEFORE the car goes limp. If you are seeing 10% WGDC, it is already limp and the log won't tell you jack. I'm guessing boost leak or DV failure. Or possibly insufficient I-Max at redline (on the one good log, I see there is some deviation at redline, and pre-lin meets the ilimit) I don't see how this has anything to do with a bad MAF btw. |
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« Last Edit: November 20, 2014, 11:04:34 AM by nyet »
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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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« Reply #20 on: November 20, 2014, 12:01:21 PM »
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Oem based on info on box and sensor itself. if I wait till around 3k to go wot so I don't limp, load around 260 with request 230 and afr 10.8
And you are targeting AFR 12.5??? |
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Dwynell
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« Reply #21 on: November 20, 2014, 02:57:09 PM »
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And you are targeting AFR 12.5???
Yes target afr is about 12.5. I increased kfldimx, did a few wot run and car didn't go into limp or give deviation code. The load is still a little above request with kfkhfm set to 1s |
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nyet
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« Reply #22 on: November 20, 2014, 03:00:38 PM »
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Have you checked your imax trims? (ldimxa_#)
If they are positive, I'd imax up a bit, clear codes and relog.
The ECU could be trimming your imax upwards for you.
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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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ddillenger
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« Reply #23 on: November 20, 2014, 03:12:07 PM »
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Have you checked your imax trims? (ldimxa_#)
If they are positive, I'd imax up a bit, clear codes and relog.
The ECU could be trimming your imax upwards for you.
I still think his MAF is reading high. |
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10101011
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« Reply #24 on: November 20, 2014, 05:05:09 PM »
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 Boost leak . Are you sure the ''Y"" pipe is in good order put you hands on the ''Y'' pipe at the throttle body and check if it is ripped on the bottom  Lee
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Poor quality lingers long after the price is forgotten ....
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nyet
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« Reply #25 on: November 20, 2014, 05:38:12 PM »
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I still think his MAF is reading high.
It is, SLIGHTLY, but that doesn't explain boost deviation |
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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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ddillenger
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« Reply #26 on: November 20, 2014, 05:53:32 PM »
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It absolutely does. MAF reading high will trigger premature leak diagnosis.
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Dwynell
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« Reply #27 on: November 20, 2014, 06:46:35 PM »
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It absolutely does. MAF reading high will trigger premature leak diagnosis.
I think the problem is with this maf from ECS, in the pic below actual boost is 25 psi at 3750 rpm and at same point load is 254. also think I need to adjust kfldhbn once I get maf/limp mode fixed |
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« Reply #28 on: November 20, 2014, 10:19:24 PM »
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Yes target afr is about 12.5. I increased kfldimx, did a few wot run and car didn't go into limp or give deviation code. The load is still a little above request with kfkhfm set to 1s
hmm, and I bet your maf readings are way high for the power it outputs?? |
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nyet
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« Reply #29 on: November 20, 2014, 10:58:50 PM »
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hmm, and I bet your maf readings are way high for the power it outputs??
MAF readings are high for the amount of air actually flowing into the motor  ps_w vs MAP is a good indication of whether your MAF is correct or not, since fuel trims can be compensated by KRKTE/TVUB adjustments. |
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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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